Question 1

The sampling distribution of the mean is always normally distributed.

Accepted Answer

A) True 
 B)False

Question 2

For the z test, the critical region for rejection of H 0 _________.

Accepted Answer

A)  is determined only by a 
B)  is determined by a and N 
C)  allows us to accept the null hypothesis 
D)  depends on N 
A)  is determined only by a 
B)  is determined by a and N 
C)  allows us to accept the null hypothesis 
D)  depends on N

Question 3

Define the critical region and the critical values of a statistic.

Accepted Answer

In statistical hypothesis testing, the c

Question 4

Assume the following values of s have been obtained for different Null Hypothesis Populations. Calculate the value of the standard error of the mean for samples of size N taken from the respective populations.

Accepted Answer

The answer of Assume the following values of s have...

Question 5

The normal deviate test uses the mean of the sample as a basic statistic.

Accepted Answer

A) True 
 B)False

Question 6

A computer memory manufacturer specifies that its memory chip stores data incorrectly an average of 6.3 out of 10 million cycles with a standard deviation of 0.48. A batch of 30 chips your company ordered stores data incorrectly an average of 6.9 times per 10 million cycles.

Accepted Answer

The answer of A computer memory manufacturer specifies that its...

Question 7

The average weight of a species of laboratory rats at birth is 27.6 grams with a standard deviation of 3.4 grams. You wish to test the hypothesis that a different maternal feeding cycle but the same quantity and quality will affect birth-weight. A sample of 10 female rats given the new feeding schedule gave birth to 56 baby rat pups with an average weight of 25.9 grams.

Accepted Answer

The answer of The average weight of a species of...

Question 8

A sampling distribution gives one the values a statistic can take, along with the probability of getting each value if sampling is random from the H1 population.

Accepted Answer

A) True 
 B)False

Question 9

Referring to question 29, if N is increased to 90, power = _________ to detect a real effect such that µ real = 53.

Accepted Answer

A)  0.8524 
B)  0.9103 
C)  0.4761 
D)  0.5142 
A)  0.8524 
B)  0.9103 
C)  0.4761 
D)  0.5142

Question 10

The average life of a light bulb is 862 hours with a standard deviation of 51 hours. A new manufacturing process results in a sample of 24 bulbs with a mean life of 899 hours until burn out.

Accepted Answer

The answer of The average life of a light bulb...

Question 11

Generally speaking, if the sampling distribution of a statistic is indeterminate (impossible to determine), the statistic cannot be used for inference.

Accepted Answer

A) True 
 B)False

Question 12

Explain the process of generating sampling distributions using the empirical approach.

Accepted Answer

The process of generating sampling distr

Question 13

A set of sample scores from an experiment has an N = 28 and a mean = 52. H 1 is directional, predicting an effect of the independent variable which decreases the magnitude of the dependent variable. H 0 asserts the sample is a random sample from a population of scores where µ = 55 and s = 12. a = 0.051 tail. Using the z test to analyze the data, what is the correct conclusion regarding H 0 ?

Accepted Answer

A)  reject H 0 ; the independent variable has a real effect 
B)  retain H 0 ; we cannot conclude that the independent variable has a real effect 
C)  accept H 0 ; the independent variable has no effect 
D)  reject H 0 ; the independent variable has no effect 
A)  reject H 0 ; the independent variable has a real effect 
B)  retain H 0 ; we cannot conclude that the independent variable has a real effect 
C)  accept H 0 ; the independent variable has no effect 
D)  reject H 0 ; the independent variable has no effect

Question 14

In a population with = 100 and s = 15, what is the probability if we randomly drew a sample of N = 9 we would get a value of   108?

Accepted Answer

The answer of In a population with = 100 and...

Question 15

By using a stringent alpha level, and designing the experiment for high power, we maximize the probability of correctly concluding regardless of whether H0 is true or false.

Accepted Answer

A) True 
 B)False

Question 16

The sampling distribution of the mean is made up of mean scores.

Accepted Answer

A) True 
 B)False

Question 17

A raw score distribution which has a moderate negative skew will result in a sampling distribution of the mean for N = 42 that is _________.

Accepted Answer

A)  also negatively distributed 
B)  normally distributed 
C)  positively skewed 
D)  cannot be determined 
A)  also negatively distributed 
B)  normally distributed 
C)  positively skewed 
D)  cannot be determined

Question 18

The critical value for the z distribution using a = 0.05 2 tail is _________.

Accepted Answer

A)  ±1.96 
B)  ±2.58 
C)  ±1.64 
D)  ±2.33 
A)  ±1.96 
B)  ±2.58 
C)  ±1.64 
D)  ±2.33

Question 19

The binomial distribution is an example of a sampling distribution.

Accepted Answer

A) True 
 B)False

Question 20

Is it always the case for both directional and nondirectional H 1s that if z obt ?5= z crit, the correct conclusion is to reject H 0? Explain.

Accepted Answer

No, it is not always the case that if z

The sampling distribution of the mean is always normally distributed.

For the z test, the critical region for rejection of H 0 _________.

Define the critical region and the critical values of a statistic.

Assume the following values of s have been obtained for different Null Hypothesis Populations. Calculate the value of the standard error of the mean for samples of size N taken from the respective populations.

The normal deviate test uses the mean of the sample as a basic statistic.

A computer memory manufacturer specifies that its memory chip stores data incorrectly an average of 6.3 out of 10 million cycles with a standard deviation of 0.48. A batch of 30 chips your company ordered stores data incorrectly an average of 6.9 times per 10 million cycles.

A sampling distribution gives one the values a statistic can take, along with the probability of getting each value if sampling is random from the H₁ population.

Referring to question 29, if N is increased to 90, power = _________ to detect a real effect such that µ real = 53.

The average life of a light bulb is 862 hours with a standard deviation of 51 hours. A new manufacturing process results in a sample of 24 bulbs with a mean life of 899 hours until burn out.

Generally speaking, if the sampling distribution of a statistic is indeterminate (impossible to determine), the statistic cannot be used for inference.

Explain the process of generating sampling distributions using the empirical approach.

In a population with = 100 and s = 15, what is the probability if we randomly drew a sample of N = 9 we would get a value of 108?

By using a stringent alpha level, and designing the experiment for high power, we maximize the probability of correctly concluding regardless of whether H₀ is true or false.

The sampling distribution of the mean is made up of mean scores.

A raw score distribution which has a moderate negative skew will result in a sampling distribution of the mean for N = 42 that is _________.

The critical value for the z distribution using a = 0.05 2 tail is _________.

The binomial distribution is an example of a sampling distribution.

Is it always the case for both directional and nondirectional H ₁s that if z _obt ?5= z _crit, the correct conclusion is to reject H ₀? Explain.

Statistics and Scientific Method

Basic Mathematical and Measurement Concepts

Frequency Distributions

Measures of Central Tendency and Variability

The Normal Curve and Standard Scores

Correlation

Linear Regression

Random Sampling and Probability

Binomial Distribution

Introduction to Hypothesis Testing: Using the Sign Test

Power

Students T Test for Single Samples

Students T Test for Correlated and Independent Groups

Introduction to the Analysis of Variance

Introduction to the Two-Way Analysis of Variance

Chi-Square and Other Nonparametric Tests

Filters

Exam 12: Sampling Distributions, Sampling Distribution of the Mean: the Normal Deviate Z Test

The sampling distribution of the mean is always normally distributed.

For the z test, the critical region for rejection of H 0 _________.

Define the critical region and the critical values of a statistic.

Assume the following values of s have been obtained for different Null Hypothesis Populations. Calculate the value of the standard error of the mean for samples of size N taken from the respective populations.

The normal deviate test uses the mean of the sample as a basic statistic.

A computer memory manufacturer specifies that its memory chip stores data incorrectly an average of 6.3 out of 10 million cycles with a standard deviation of 0.48. A batch of 30 chips your company ordered stores data incorrectly an average of 6.9 times per 10 million cycles.

A sampling distribution gives one the values a statistic can take, along with the probability of getting each value if sampling is random from the H1 population.

Referring to question 29, if N is increased to 90, power = _________ to detect a real effect such that µ real = 53.

The average life of a light bulb is 862 hours with a standard deviation of 51 hours. A new manufacturing process results in a sample of 24 bulbs with a mean life of 899 hours until burn out.

Generally speaking, if the sampling distribution of a statistic is indeterminate (impossible to determine), the statistic cannot be used for inference.

Explain the process of generating sampling distributions using the empirical approach.

In a population with = 100 and s = 15, what is the probability if we randomly drew a sample of N = 9 we would get a value of 108?

By using a stringent alpha level, and designing the experiment for high power, we maximize the probability of correctly concluding regardless of whether H0 is true or false.

The sampling distribution of the mean is made up of mean scores.

A raw score distribution which has a moderate negative skew will result in a sampling distribution of the mean for N = 42 that is _________.

The critical value for the z distribution using a = 0.05 2 tail is _________.

The binomial distribution is an example of a sampling distribution.

Is it always the case for both directional and nondirectional H 1s that if z obt ?5= z crit, the correct conclusion is to reject H 0? Explain.

Statistics and Scientific Method

Basic Mathematical and Measurement Concepts

Frequency Distributions

Measures of Central Tendency and Variability

The Normal Curve and Standard Scores

Correlation

Linear Regression

Random Sampling and Probability

Binomial Distribution

Introduction to Hypothesis Testing: Using the Sign Test

Power

Students T Test for Single Samples

Students T Test for Correlated and Independent Groups

Introduction to the Analysis of Variance

Introduction to the Two-Way Analysis of Variance

Chi-Square and Other Nonparametric Tests

Filters

A sampling distribution gives one the values a statistic can take, along with the probability of getting each value if sampling is random from the H₁ population.

By using a stringent alpha level, and designing the experiment for high power, we maximize the probability of correctly concluding regardless of whether H₀ is true or false.

Is it always the case for both directional and nondirectional H ₁s that if z _obt ?5= z _crit, the correct conclusion is to reject H ₀? Explain.