If x is uniformly distributed over some interval.The mean value (μ)of x is 2 and its variance (σ2)is 1/3.The probability that x is between 2 and 2.5,P(2 $\le$ x $\le$ 2.5),is _________.

A) 0.45 B) 0.40 C) 0.35 D) 0.33 E) 0.25 A) 0.45 B) 0.40 C) 0.35 D) 0.33 E) 0.25

Exam 6: Continuous Distributions

Suppose the total time to fill a routine prescription at a local pharmacy is 35 minutes based on the time the physician places the order to the time it is dispensed.Assume the standard deviation is 11 minutes.A z score was calculated for a number,and the z score is 3.4. What is x?

(Multiple Choice)

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Question 41

Suppose the total time to fill a routine prescription at a local pharmacy is 35 minutes based on the time the physician places the order to the time it is dispensed.Assume the standard deviation is 11 minutes and the z score is 0. What is x?

(Multiple Choice)

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Question 42

A z score is the number of __________ that a value is from the mean.

(Multiple Choice)

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Question 43

Suppose you are working with a data set that is normally distributed with a mean of 400 and a standard deviation of 20. Determine the value of x such that 60% of the values are greater than x.

(Multiple Choice)

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Question 44

The normal distribution is an example of _______.

(Multiple Choice)

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Question 45

Suppose 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 height of this distribution,f(x),is __________________.

(Multiple Choice)

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Question 46

A uniform continuous distribution is also referred to as a rectangular distribution.

(True/False)

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Question 47

If variable x is normally distributed with mean 0 and standard deviation 1,x ~ N(0,1),then the probability that x is exactly 0 is _________.

(Multiple Choice)

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Question 48

The average time between phone calls arriving at a call center is 30 seconds.Assuming that the time between calls is exponentially distributed,find the probability that more than a minute elapses between calls.

(Multiple Choice)

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Question 49

The height of the rectangle depicting a uniform distribution is the probability of each outcome and it same for all of the possible outcomes

(True/False)

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Question 50

In a standard normal distribution,if the area under curve to the right of a z-value is 0.10,then the area to the left of the same z-value is -0.10.

(True/False)

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Question 51

The probability that a call to an emergency help line is answered in less than 10 seconds is 0.8.Assume that the calls are independent of each other.Using the normal approximation for binomial with a correction for continuity,the probability that at least 75 of 100 calls are answered within 10 seconds is approximately _______

(Multiple Choice)

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Question 52

Most graduate business schools require applicants to take the GMAT.Scores on this test are approximately normally distributed with a mean of 545 points and a standard deviation of 100 points.What score do you need to be in the top 5% (approximately the scores needed for top schools)?

(Multiple Choice)

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Question 53

Completion time (from start to finish)of a building remodeling project is normally distributed with a mean of 200 work-days and a standard deviation of 10 work-days. The probability that the project will be completed within 185 work-days is ______.

(Multiple Choice)

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Question 54

For an exponential distribution with a lambda (l)equal to 20,the mean equal to _______.

(Multiple Choice)

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Question 55

If x is uniformly distributed over some interval.The mean value (μ)of x is 2 and its variance (σ²)is 1/3.The probability that x is between 2 and 2.5,P(2 $\le$ x $\le$ 2.5),is _________.

(Multiple Choice)

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Question 56

Let z be a normal random variable with mean 0 and standard deviation 1.What is P(-2.25 < z < -1.1)?

(Multiple Choice)

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Question 57

Employees arrive at a cafeteria according to a Poisson process at an average rate of 30 employees per hour.The average waiting time between employees' arrivals is _________ minutes.

(Multiple Choice)

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Question 58

Let z be a normal random variable with mean 0 and standard deviation 1.What is P(1.3 < z < 2.3)?

(Multiple Choice)

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Question 59

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 of at least 50,000 miles?

(Multiple Choice)

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Question 60

Showing 41 - 60 of 90

Suppose the total time to fill a routine prescription at a local pharmacy is 35 minutes based on the time the physician places the order to the time it is dispensed.Assume the standard deviation is 11 minutes.A z score was calculated for a number,and the z score is 3.4. What is x?

Suppose the total time to fill a routine prescription at a local pharmacy is 35 minutes based on the time the physician places the order to the time it is dispensed.Assume the standard deviation is 11 minutes and the z score is 0. What is x?

A z score is the number of __________ that a value is from the mean.

Suppose you are working with a data set that is normally distributed with a mean of 400 and a standard deviation of 20. Determine the value of x such that 60% of the values are greater than x.

The normal distribution is an example of _______.

Suppose 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 height of this distribution,f(x),is __________________.

A uniform continuous distribution is also referred to as a rectangular distribution.

If variable x is normally distributed with mean 0 and standard deviation 1,x ~ N(0,1),then the probability that x is exactly 0 is _________.

The average time between phone calls arriving at a call center is 30 seconds.Assuming that the time between calls is exponentially distributed,find the probability that more than a minute elapses between calls.

The height of the rectangle depicting a uniform distribution is the probability of each outcome and it same for all of the possible outcomes

In a standard normal distribution,if the area under curve to the right of a z-value is 0.10,then the area to the left of the same z-value is -0.10.

Most graduate business schools require applicants to take the GMAT.Scores on this test are approximately normally distributed with a mean of 545 points and a standard deviation of 100 points.What score do you need to be in the top 5% (approximately the scores needed for top schools)?

Completion time (from start to finish)of a building remodeling project is normally distributed with a mean of 200 work-days and a standard deviation of 10 work-days. The probability that the project will be completed within 185 work-days is ______.

For an exponential distribution with a lambda (l)equal to 20,the mean equal to _______.

If x is uniformly distributed over some interval.The mean value (μ)of x is 2 and its variance (σ²)is 1/3.The probability that x is between 2 and 2.5,P(2 $\le$ x $\le$ 2.5),is _________.

Let z be a normal random variable with mean 0 and standard deviation 1.What is P(-2.25 < z < -1.1)?

Employees arrive at a cafeteria according to a Poisson process at an average rate of 30 employees per hour.The average waiting time between employees' arrivals is _________ minutes.

Let z be a normal random variable with mean 0 and standard deviation 1.What is P(1.3 < z < 2.3)?

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

Suppose the total time to fill a routine prescription at a local pharmacy is 35 minutes based on the time the physician places the order to the time it is dispensed.Assume the standard deviation is 11 minutes.A z score was calculated for a number,and the z score is 3.4. What is x?

Suppose the total time to fill a routine prescription at a local pharmacy is 35 minutes based on the time the physician places the order to the time it is dispensed.Assume the standard deviation is 11 minutes and the z score is 0. What is x?

A z score is the number of __________ that a value is from the mean.

Suppose you are working with a data set that is normally distributed with a mean of 400 and a standard deviation of 20. Determine the value of x such that 60% of the values are greater than x.

The normal distribution is an example of _______.

Suppose 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 height of this distribution,f(x),is __________________.

A uniform continuous distribution is also referred to as a rectangular distribution.

If variable x is normally distributed with mean 0 and standard deviation 1,x ~ N(0,1),then the probability that x is exactly 0 is _________.

The average time between phone calls arriving at a call center is 30 seconds.Assuming that the time between calls is exponentially distributed,find the probability that more than a minute elapses between calls.

The height of the rectangle depicting a uniform distribution is the probability of each outcome and it same for all of the possible outcomes

In a standard normal distribution,if the area under curve to the right of a z-value is 0.10,then the area to the left of the same z-value is -0.10.

Most graduate business schools require applicants to take the GMAT.Scores on this test are approximately normally distributed with a mean of 545 points and a standard deviation of 100 points.What score do you need to be in the top 5% (approximately the scores needed for top schools)?

Completion time (from start to finish)of a building remodeling project is normally distributed with a mean of 200 work-days and a standard deviation of 10 work-days. The probability that the project will be completed within 185 work-days is ______.

For an exponential distribution with a lambda (l)equal to 20,the mean equal to _______.

If x is uniformly distributed over some interval.The mean value (μ)of x is 2 and its variance (σ2)is 1/3.The probability that x is between 2 and 2.5,P(2 ≤\le≤ x ≤\le≤ 2.5),is _________.

Let z be a normal random variable with mean 0 and standard deviation 1.What is P(-2.25 < z < -1.1)?

Employees arrive at a cafeteria according to a Poisson process at an average rate of 30 employees per hour.The average waiting time between employees' arrivals is _________ minutes.

Let z be a normal random variable with mean 0 and standard deviation 1.What is P(1.3 < z < 2.3)?

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

Suppose 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 height of this distribution,f(x),is __________________.

If x is uniformly distributed over some interval.The mean value (μ)of x is 2 and its variance (σ²)is 1/3.The probability that x is between 2 and 2.5,P(2 $\le$ x $\le$ 2.5),is _________.