Question 1

Sampling distribution of is the

Accepted Answer

A)  probability distribution of the sample mean 
B)  probability distribution of the sample proportion 
C)  mean of the sample 
D)  mean of the population 
A)  probability distribution of the sample mean 
B)  probability distribution of the sample proportion 
C)  mean of the sample 
D)  mean of the population

Question 2

Random samples of size 36 are taken from an infinite population whose mean and standard deviation are 20 and 15, respectively. The distribution of the population is unknown. The mean and the standard error of the mean are

Accepted Answer

A)  36 and 15 
B)  20 and 15 
C)  20 and 0.417 
D)  20 and 2.5 
A)  36 and 15 
B)  20 and 15 
C)  20 and 0.417 
D)  20 and 2.5

Question 3

In a restaurant, the proportion of people who order coffee with their dinner is .9. A simple random sample of 144 patrons of the restaurant is taken.
a. What are the expected value, standard deviation, and shape of the sampling distribution of ?
b. What is the probability that the proportion of people who will order coffee with their meal is between 0.85 and 0.875?
c. What is the probability that the proportion of people who will order coffee with their meal is at least 0.945?

Accepted Answer

a. 0.9; 0.

Question 4

A population has a mean of 75 and a standard deviation of 8. A random sample of 800 is selected. The expected value of is

Accepted Answer

A)  8 
B)  75 
C)  800 
D)  None of these alternatives is correct. 
A)  8 
B)  75 
C)  800 
D)  None of these alternatives is correct.

Sampling distribution of is the

Random samples of size 36 are taken from an infinite population whose mean and standard deviation are 20 and 15, respectively. The distribution of the population is unknown. The mean and the standard error of the mean are

A population has a mean of 75 and a standard deviation of 8. A random sample of 800 is selected. The expected value of is

Data and Statistics

Descriptive Statistics: Tabular and Graphical Displays

Descriptive Statistics: Numerical Measures

Introduction to Probability

Discrete Probability Distributions

Continuous Probability Distributions

Interval Estimation

Hypothesis Tests

Comparisons Involving Means, Experimental Design, and Analysis of Variance

Comparisons Involving Proportions and a Test of Independence

Simple Linear Regression

Multiple Regression

Filters

Exam 7: Sampling and Sampling Distributions

Sampling distribution of is the

Random samples of size 36 are taken from an infinite population whose mean and standard deviation are 20 and 15, respectively. The distribution of the population is unknown. The mean and the standard error of the mean are

A population has a mean of 75 and a standard deviation of 8. A random sample of 800 is selected. The expected value of is

Data and Statistics

Descriptive Statistics: Tabular and Graphical Displays

Descriptive Statistics: Numerical Measures

Introduction to Probability

Discrete Probability Distributions

Continuous Probability Distributions

Interval Estimation

Hypothesis Tests

Comparisons Involving Means, Experimental Design, and Analysis of Variance

Comparisons Involving Proportions and a Test of Independence

Simple Linear Regression

Multiple Regression

Filters