Question 1

What kind of distribution is the t distribution?

Accepted Answer

A) Continuous 
B) Discrete 
C) Subjective 
D) z distribution 
A) Continuous 
B) Discrete 
C) Subjective 
D) z distribution

Question 2

A survey of an urban university (population of 25,450)showed that 750 of 1100 students sampled attended a home football game during the season.Using the 99% level of confidence,what is the confidence interval for the proportion of students attending a football game?

Accepted Answer

A) [0.767,0.814] 
B) [0.6550,0.7050] 
C) [0.6659,0.6941] 
D) [0.6795,0.6805] 
A) [0.767,0.814] 
B) [0.6550,0.7050] 
C) [0.6659,0.6941] 
D) [0.6795,0.6805]

Question 3

The 95 percent confidence interval states that 95 percent of the sample means of a specified sample size selected from a population will lie within plus and minus 1.96 standard deviations of the hypothesized population mean.

Accepted Answer

A) True 
 B)False

Question 4

A local company wants to evaluate their quality of service by surveying their customers.Their budget limits the number of surveys to 100.What is their maximum error of the estimated mean quality for a 95% level of confidence and an estimated standard deviation of 5?

Accepted Answer

A) 0.9604 
B) 0.9920 
C) 1.96 
D) 5% 
A) 0.9604 
B) 0.9920 
C) 1.96 
D) 5%

Question 5

Making generalized statements about a population based on a sample is called ______________________.

Accepted Answer

statistica

Question 6

Explain the concept of a confidence interval when estimating a population mean.

Accepted Answer

A confidence interval is derived from th

Question 7

Which statement(s)is/are correct about the t distribution?

Accepted Answer

A) Mean = 0 
B) Symmetric 
C) Based on degrees of freedom 
D) All of these are correct 
A) Mean = 0 
B) Symmetric 
C) Based on degrees of freedom 
D) All of these are correct

Question 8

A student wanted to construct a 95% confidence interval for the average age of students in her statistics class.She randomly selected 9 students.Their average age was 19.1 years with a standard deviation of 1.5 years.What is the 99% confidence interval for the population mean?

Accepted Answer

A) [17.42,20.78] 
B) [17.48,20.72] 
C) [14.23,23.98] 
D) [0.44,3.80] 
A) [17.42,20.78] 
B) [17.48,20.72] 
C) [14.23,23.98] 
D) [0.44,3.80]

Question 9

A point estimate is a range of values used to estimate a population parameter.

Accepted Answer

A) True 
 B)False

Question 10

When using Student's t to compute an interval estimate,

Accepted Answer

A) we assume that the samples are collected from normally distributed populations 
B) we estimate the population standard deviation based on the sample standard deviation 
C) we use the z distribution 
D) A and B only 
A) we assume that the samples are collected from normally distributed populations 
B) we estimate the population standard deviation based on the sample standard deviation 
C) we use the z distribution 
D) A and B only

Question 11

A student wanted to construct a 95% confidence interval for the average age of students in her statistics class.She randomly selected 9 students.Their average age was 19.1 years with a standard deviation of 1.5 years.What is the 95% confidence interval for the population mean?

Accepted Answer

A) [0.97,3.27] 
B) [15.64,22.56] 
C) [17.97,20.23] 
D) [17.95,20.25] 
A) [0.97,3.27] 
B) [15.64,22.56] 
C) [17.97,20.23] 
D) [17.95,20.25]

Question 12

A survey of 25 grocery stores revealed that the average price of a gallon of milk was $2.98 with a standard error of $0.10.If 90% and 95% confidence intervals are developed to estimate the true cost of a gallon of milk,what similarities would they have?

Accepted Answer

A) Point estimates 
B) t-statistics 
C) Standard errors 
D) Both a and c 
A) Point estimates 
B) t-statistics 
C) Standard errors 
D) Both a and c

Question 13

A survey of an urban university (population of 25,450)showed that 750 of 1100 students sampled attended a home football game during the season.Using the 90% level of confidence,what is the confidence interval for the proportion of students attending a football game?

Accepted Answer

A) [0.7510,0.8290] 
B) [0.6620,0.6980] 
C) [0.6659,0.6941] 
D) [0.6795,0.6805] 
A) [0.7510,0.8290] 
B) [0.6620,0.6980] 
C) [0.6659,0.6941] 
D) [0.6795,0.6805]

Question 14

The distribution of Student's t has

Accepted Answer

A) a mean of zero and a standard deviation of one 
B) a mean of one and a standard deviation of one 
C) a mean of zero and a standard deviation that depends on the sample size 
D) a mean that depends on the sample size and a standard deviation of one 
A) a mean of zero and a standard deviation of one 
B) a mean of one and a standard deviation of one 
C) a mean of zero and a standard deviation that depends on the sample size 
D) a mean that depends on the sample size and a standard deviation of one

What kind of distribution is the t distribution?

A survey of an urban university (population of 25,450)showed that 750 of 1100 students sampled attended a home football game during the season.Using the 99% level of confidence,what is the confidence interval for the proportion of students attending a football game?

The 95 percent confidence interval states that 95 percent of the sample means of a specified sample size selected from a population will lie within plus and minus 1.96 standard deviations of the hypothesized population mean.

A local company wants to evaluate their quality of service by surveying their customers.Their budget limits the number of surveys to 100.What is their maximum error of the estimated mean quality for a 95% level of confidence and an estimated standard deviation of 5?

Making generalized statements about a population based on a sample is called ______________________.

Explain the concept of a confidence interval when estimating a population mean.

Which statement(s)is/are correct about the t distribution?

A student wanted to construct a 95% confidence interval for the average age of students in her statistics class.She randomly selected 9 students.Their average age was 19.1 years with a standard deviation of 1.5 years.What is the 99% confidence interval for the population mean?

A point estimate is a range of values used to estimate a population parameter.

When using Student's t to compute an interval estimate,

A student wanted to construct a 95% confidence interval for the average age of students in her statistics class.She randomly selected 9 students.Their average age was 19.1 years with a standard deviation of 1.5 years.What is the 95% confidence interval for the population mean?

A survey of 25 grocery stores revealed that the average price of a gallon of milk was $2.98 with a standard error of $0.10.If 90% and 95% confidence intervals are developed to estimate the true cost of a gallon of milk,what similarities would they have?

A survey of an urban university (population of 25,450)showed that 750 of 1100 students sampled attended a home football game during the season.Using the 90% level of confidence,what is the confidence interval for the proportion of students attending a football game?

The distribution of Student's t has

What Is Statistics

Describing Data: Frequency Distributions and Graphic Presentations

Describing Data: Numerical Measures

Describing Data: Displaying and Exploring Data

A Survey of Probability Concepts

Discrete Probability Distributions

Continuous Probability Distributions

Sampling Methods and the Central Limit Theorem

One-Sample Tests of Hypothesis

Two-Sample Tests of Hypothesis

Analysis of Variance

Linear Regression and Correlation

Multiple Regression and Correlation Analysis

Chi-Square Applications

Filters

Exam 9: Estimation and Confidence Intervals

What kind of distribution is the t distribution?

A survey of an urban university (population of 25,450)showed that 750 of 1100 students sampled attended a home football game during the season.Using the 99% level of confidence,what is the confidence interval for the proportion of students attending a football game?

The 95 percent confidence interval states that 95 percent of the sample means of a specified sample size selected from a population will lie within plus and minus 1.96 standard deviations of the hypothesized population mean.

A local company wants to evaluate their quality of service by surveying their customers.Their budget limits the number of surveys to 100.What is their maximum error of the estimated mean quality for a 95% level of confidence and an estimated standard deviation of 5?

Making generalized statements about a population based on a sample is called ______________________.

Explain the concept of a confidence interval when estimating a population mean.

Which statement(s)is/are correct about the t distribution?

A student wanted to construct a 95% confidence interval for the average age of students in her statistics class.She randomly selected 9 students.Their average age was 19.1 years with a standard deviation of 1.5 years.What is the 99% confidence interval for the population mean?

A point estimate is a range of values used to estimate a population parameter.

When using Student's t to compute an interval estimate,

A student wanted to construct a 95% confidence interval for the average age of students in her statistics class.She randomly selected 9 students.Their average age was 19.1 years with a standard deviation of 1.5 years.What is the 95% confidence interval for the population mean?

A survey of 25 grocery stores revealed that the average price of a gallon of milk was $2.98 with a standard error of $0.10.If 90% and 95% confidence intervals are developed to estimate the true cost of a gallon of milk,what similarities would they have?

A survey of an urban university (population of 25,450)showed that 750 of 1100 students sampled attended a home football game during the season.Using the 90% level of confidence,what is the confidence interval for the proportion of students attending a football game?

The distribution of Student's t has

What Is Statistics

Describing Data: Frequency Distributions and Graphic Presentations

Describing Data: Numerical Measures

Describing Data: Displaying and Exploring Data

A Survey of Probability Concepts

Discrete Probability Distributions

Continuous Probability Distributions

Sampling Methods and the Central Limit Theorem

One-Sample Tests of Hypothesis

Two-Sample Tests of Hypothesis

Analysis of Variance

Linear Regression and Correlation

Multiple Regression and Correlation Analysis

Chi-Square Applications

Filters