Exam 6: Continuous Distributions

If the number of parking spots at urban grocery stores is uniformly distributed over the interval 90 to 140,inclusively (90 $\le$ x $\le$ 140),then the standard deviation of this distribution is __________________.

(Multiple Choice)

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Question 61

Employees arrive at a cafeteria according to a Poisson process at an average rate of 30 employees per hour.The probability that after one employee arrives,the next one will arrive at least 3 minutes later is _________.

(Multiple Choice)

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Question 62

A recent market study has determined that the probability that a young adult will be willing to try a new online financial service that your company is offering is 50%.In a random sample of 10 young adults,the approximate probability that at least 2 but no more than 3 will be willing to try this new service is _________.

(Multiple Choice)

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Question 63

The area under the standard normal distribution between -1 and 1 is twice the area between 0 and 1.

(True/False)

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Question 64

If x,the time (in minutes)to complete an change job at certain auto service station,is uniformly distributed over the interval 20 to 30,inclusively (20 $\le$ x $\le$ 30),then the probability that an oil change job is completed in 21.75 to 24.25 minutes,inclusively,i.e.,P(21.75 $\le$ x $\le$ 24.25)is __________________.

(Multiple Choice)

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Question 65

Participants in a 2 day biking event,cross the finish line at a rate of 10 bike riders per fifteen minute interval.The probability that at least 2 minutes will elapse between bike riders is _____________.

(Multiple Choice)

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Question 66

Inquiries arrive at a record message device according to a Poisson process of rate 15 inquiries per minute.The probability that it takes more than 12 seconds for the first inquiry to arrive is approximately _________

(Multiple Choice)

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Question 67

The expected (mean)life of a particular type of light bulb is 1,000 hours with a standard deviation of 50 hours.The life of this bulb is normally distributed.What is the probability that a randomly selected bulb would last fewer than 1100 hours?

(Multiple Choice)

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Question 68

Participants in a 2 day biking event,cross the finish line at a rate of 10 bike riders per fifteen minute interval.On average,how much time,in minutes,elapses between bike riders?

(Multiple Choice)

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Question 69

If x is uniformly distributed over the interval 8 to 12,inclusively (8 $\le$ x $\le$ 12),then the probability,P(10.0 $\le$ x $\le$ 11.5),is __________________.

(Multiple Choice)

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Question 70

If x,the time (in minutes)to complete an change job at certain auto service station,is uniformly distributed over the interval 20 to 30,inclusively (20 $\le$ x $\le$ 30),then the probability that an oil change job is completed in less than 17 minutes,i.e.,P(x < 17)is __________________.

(Multiple Choice)

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Question 71

A standard normal distribution has a mean of one and a standard deviation of three.

(True/False)

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Question 72

The expected (mean)life of a particular type of light bulb is 1,000 hours with a standard deviation of 50 hours.The life of this bulb is normally distributed. What is the probability that a randomly selected bulb would last fewer than 940 hours?

(Multiple Choice)

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Question 73

If x,the time (in minutes)to complete an oil change job at certain auto service station,is uniformly distributed over the interval 20 to 30,inclusively (20 $\le$ x $\le$ 30),then the standard deviation of this distribution is __________________.

(Multiple Choice)

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Question 74

Since a normal distribution curve extends from minus infinity to plus infinity,the area under the curve is infinity.

(True/False)

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Question 75

If the number of parking spots at urban grocery stores is uniformly distributed over the interval 90 to 140,inclusively (90 $\le$ x $\le$ 140),inclusively (90 $\le$ x $\le$ 140),then the mean of this distribution is __________________.

(Multiple Choice)

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Question 76

A recent market study has determined that the probability that a young adult will be willing to try a new online financial service that your company is offering is 50%.In a random sample of 10 young adults,the probability that exactly 5 will be willing to try this new service is _,and the approximate probability (using the normal distribution is)_.

(Multiple Choice)

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Question 77

The area under the standard normal distribution between 0 and 2 is twice the area between 0 and 1.

(True/False)

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Question 78

At a certain workstation in an assembly line,the time required to assemble a component is exponentially distributed with a mean time of 10 minutes.Find the probability that a component is assembled in 7 minutes or less?

(Multiple Choice)

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Question 79

Sure Stone Tire Company has established that the useful life of a particular brand of its automobile tires is normally distributed with a mean of 40,000 miles and a standard deviation of 5000 miles.What is the probability that a randomly selected tire of this brand has a life between 30,000 and 50,000 miles?

(Multiple Choice)

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Question 80

Showing 61 - 80 of 90

If the number of parking spots at urban grocery stores is uniformly distributed over the interval 90 to 140,inclusively (90 $\le$ x $\le$ 140),then the standard deviation of this distribution is __________________.

Employees arrive at a cafeteria according to a Poisson process at an average rate of 30 employees per hour.The probability that after one employee arrives,the next one will arrive at least 3 minutes later is _________.

The area under the standard normal distribution between -1 and 1 is twice the area between 0 and 1.

Participants in a 2 day biking event,cross the finish line at a rate of 10 bike riders per fifteen minute interval.The probability that at least 2 minutes will elapse between bike riders is _____________.

Inquiries arrive at a record message device according to a Poisson process of rate 15 inquiries per minute.The probability that it takes more than 12 seconds for the first inquiry to arrive is approximately _________

The expected (mean)life of a particular type of light bulb is 1,000 hours with a standard deviation of 50 hours.The life of this bulb is normally distributed.What is the probability that a randomly selected bulb would last fewer than 1100 hours?

Participants in a 2 day biking event,cross the finish line at a rate of 10 bike riders per fifteen minute interval.On average,how much time,in minutes,elapses between bike riders?

If x is uniformly distributed over the interval 8 to 12,inclusively (8 $\le$ x $\le$ 12),then the probability,P(10.0 $\le$ x $\le$ 11.5),is __________________.

If x,the time (in minutes)to complete an change job at certain auto service station,is uniformly distributed over the interval 20 to 30,inclusively (20 $\le$ x $\le$ 30),then the probability that an oil change job is completed in less than 17 minutes,i.e.,P(x < 17)is __________________.

A standard normal distribution has a mean of one and a standard deviation of three.

The expected (mean)life of a particular type of light bulb is 1,000 hours with a standard deviation of 50 hours.The life of this bulb is normally distributed. What is the probability that a randomly selected bulb would last fewer than 940 hours?

If x,the time (in minutes)to complete an oil change job at certain auto service station,is uniformly distributed over the interval 20 to 30,inclusively (20 $\le$ x $\le$ 30),then the standard deviation of this distribution is __________________.

Since a normal distribution curve extends from minus infinity to plus infinity,the area under the curve is infinity.

If the number of parking spots at urban grocery stores is uniformly distributed over the interval 90 to 140,inclusively (90 $\le$ x $\le$ 140),inclusively (90 $\le$ x $\le$ 140),then the mean of this distribution is __________________.

The area under the standard normal distribution between 0 and 2 is twice the area between 0 and 1.

At a certain workstation in an assembly line,the time required to assemble a component is exponentially distributed with a mean time of 10 minutes.Find the probability that a component is assembled in 7 minutes or less?

Introduction to Statistics

Charts and Graphs

Descriptive Statistics

Probability

Discrete Distributions

Sampling and Sampling Distributions

Statistical Inference: Estimation for Single Populations

Statistical Inference: Hypothesis Testing for Single Populations

Statistical Inferences About Two Populations

A Nalysis of Variance and Design of Experiments

Simple Regression Analysis and Correlation

Multiple Regression Analysis

Building Multiple Regression Models

Time-Series Forecasting and Index Numbers

Analysis of Categorical Data

Nonparametric Statistics

Statistical Quality Control

Decision Analysis

Filters

Exam 6: Continuous Distributions

If the number of parking spots at urban grocery stores is uniformly distributed over the interval 90 to 140,inclusively (90 ≤\le≤ x ≤\le≤ 140),then the standard deviation of this distribution is __________________.

Employees arrive at a cafeteria according to a Poisson process at an average rate of 30 employees per hour.The probability that after one employee arrives,the next one will arrive at least 3 minutes later is _________.

The area under the standard normal distribution between -1 and 1 is twice the area between 0 and 1.

Participants in a 2 day biking event,cross the finish line at a rate of 10 bike riders per fifteen minute interval.The probability that at least 2 minutes will elapse between bike riders is _____________.

Inquiries arrive at a record message device according to a Poisson process of rate 15 inquiries per minute.The probability that it takes more than 12 seconds for the first inquiry to arrive is approximately _________

The expected (mean)life of a particular type of light bulb is 1,000 hours with a standard deviation of 50 hours.The life of this bulb is normally distributed.What is the probability that a randomly selected bulb would last fewer than 1100 hours?

Participants in a 2 day biking event,cross the finish line at a rate of 10 bike riders per fifteen minute interval.On average,how much time,in minutes,elapses between bike riders?

If x is uniformly distributed over the interval 8 to 12,inclusively (8 ≤\le≤ x ≤\le≤ 12),then the probability,P(10.0 ≤\le≤ x ≤\le≤ 11.5),is __________________.

If x,the time (in minutes)to complete an change job at certain auto service station,is uniformly distributed over the interval 20 to 30,inclusively (20 ≤\le≤ x ≤\le≤ 30),then the probability that an oil change job is completed in less than 17 minutes,i.e.,P(x < 17)is __________________.

A standard normal distribution has a mean of one and a standard deviation of three.

The expected (mean)life of a particular type of light bulb is 1,000 hours with a standard deviation of 50 hours.The life of this bulb is normally distributed. What is the probability that a randomly selected bulb would last fewer than 940 hours?

If x,the time (in minutes)to complete an oil change job at certain auto service station,is uniformly distributed over the interval 20 to 30,inclusively (20 ≤\le≤ x ≤\le≤ 30),then the standard deviation of this distribution is __________________.

Since a normal distribution curve extends from minus infinity to plus infinity,the area under the curve is infinity.

If the number of parking spots at urban grocery stores is uniformly distributed over the interval 90 to 140,inclusively (90 ≤\le≤ x ≤\le≤ 140),inclusively (90 ≤\le≤ x ≤\le≤ 140),then the mean of this distribution is __________________.

The area under the standard normal distribution between 0 and 2 is twice the area between 0 and 1.

At a certain workstation in an assembly line,the time required to assemble a component is exponentially distributed with a mean time of 10 minutes.Find the probability that a component is assembled in 7 minutes or less?

Introduction to Statistics

Charts and Graphs

Descriptive Statistics

Probability

Discrete Distributions

Sampling and Sampling Distributions

Statistical Inference: Estimation for Single Populations

Statistical Inference: Hypothesis Testing for Single Populations

Statistical Inferences About Two Populations

A Nalysis of Variance and Design of Experiments

Simple Regression Analysis and Correlation

Multiple Regression Analysis

Building Multiple Regression Models

Time-Series Forecasting and Index Numbers

Analysis of Categorical Data

Nonparametric Statistics

Statistical Quality Control

Decision Analysis

Filters

If the number of parking spots at urban grocery stores is uniformly distributed over the interval 90 to 140,inclusively (90 $\le$ x $\le$ 140),then the standard deviation of this distribution is __________________.

If x is uniformly distributed over the interval 8 to 12,inclusively (8 $\le$ x $\le$ 12),then the probability,P(10.0 $\le$ x $\le$ 11.5),is __________________.

If x,the time (in minutes)to complete an change job at certain auto service station,is uniformly distributed over the interval 20 to 30,inclusively (20 $\le$ x $\le$ 30),then the probability that an oil change job is completed in less than 17 minutes,i.e.,P(x < 17)is __________________.

If x,the time (in minutes)to complete an oil change job at certain auto service station,is uniformly distributed over the interval 20 to 30,inclusively (20 $\le$ x $\le$ 30),then the standard deviation of this distribution is __________________.

If the number of parking spots at urban grocery stores is uniformly distributed over the interval 90 to 140,inclusively (90 $\le$ x $\le$ 140),inclusively (90 $\le$ x $\le$ 140),then the mean of this distribution is __________________.