Several years ago the proportion of Americans aged 18-24 who invested in the stock market was 0.20. A random sample of 25 Americans in this age group was recently taken. They were asked whether or not they invested in the stock market. The results follow: \[\begin{array} { l l l l l } y e s & \text { no } & \text { no } & \text { yes } & \text { no } \\ \text { no } & \text { yes } & \text { no } & \text { no } & \text { yes } \\ \text { no } & \text { no } & \text { no } & \text { no } & \text { no } \\ \text { no } & \text { no } & \text { no } & \text { yes } & \text { no } \\ \text { no } & \text { no } & \text { yes } & \text { no } & \text { no } \end{array}\] At a .05 level of significance, use Excel to determine whether or not the proportion of Americans 18-24 years old that invest in the stock market has changed.

@#IMG-DLM& Do not reject H 0 , .617 > .05

More evidence against H0 is indicated by _____.

A) lower levels of significance B) smaller p-values C) smaller critical values D) lower probabilities of a Type II error A) lower levels of significance B) smaller p-values C) smaller critical values D) lower probabilities of a Type II error

Exam 9: Hypothesis Tests

A group of young businesswomen wish to open a high fashion boutique in a vacant store, but only if the average income of households in the area is more than $45,000. A random sample of nine households showed the following results. \ 48,000 \ 44,000 \ 46,000 \ 43,000 \ 47,000 \ 46,000 \ 44,000 \ 42,000 \ 45,000 Use the statistical techniques in Excel to advise the group on whether or not they should locate the boutique in this store. Use a .05 level of significance. (Assume the population is normally distributed.)

(Essay)

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Question 41

As a general guideline, the research hypothesis should be stated as the _____.

(Multiple Choice)

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Question 42

Your investment executive claims that the average yearly rate of return on the stocks she recommends is at least 10.0%. You plan on taking a sample to test her claim. The correct set of hypotheses is _____.

(Multiple Choice)

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Question 43

If a hypothesis is rejected at a 5% level of significance, it _____.

(Multiple Choice)

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Question 44

A one-tailed test is a hypothesis test in which rejection region is _____.

(Multiple Choice)

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Question 45

A p-value is the _____.

(Multiple Choice)

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Question 46

You are given the following information obtained from a random sample of five observations. 20 18 17 22 18 At a 10% level of significance, use Excel to determine whether or not the mean of the population from which this sample was taken is significantly less than 21. (Assume the population is normally distributed.)

(Essay)

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Question 47

Read the t statistic from the table of t distributions and circle the correct answer. A one-tailed test (lower tail), a sample size of 10 at a .10 level of significance; t = _____.

(Multiple Choice)

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Question 48

The level of significance in hypothesis testing is the probability of _____.

(Multiple Choice)

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Question 49

When the hypotheses H₀: μ ≥ 100 and H_a: μ < 100 are being tested at a level of significance of α, the null hypothesis will be rejected if the test statistic z is _____.

(Multiple Choice)

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Question 50

Several years ago the proportion of Americans aged 18-24 who invested in the stock market was 0.20. A random sample of 25 Americans in this age group was recently taken. They were asked whether or not they invested in the stock market. The results follow: yes no no yes no no yes no no yes no no no no no no no no yes no no no yes no no At a .05 level of significance, use Excel to determine whether or not the proportion of Americans 18-24 years old that invest in the stock market has changed.

(Essay)

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Question 51

A student believes that the average grade on the final examination in statistics is at least 85. She plans on taking a sample to test her belief. The correct set of hypotheses is _____.

(Multiple Choice)

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Question 52

When the p-value is used for hypothesis testing, the null hypothesis is rejected if _____.

(Multiple Choice)

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Question 53

Read the t statistic from the table of t distributions and circle the correct answer. A one-tailed test (upper tail), a sample size of 18 at a .05 level of significance; t = _____.

(Multiple Choice)

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Question 54

More evidence against H₀ is indicated by _____.

(Multiple Choice)

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Question 55

If a hypothesis test leads to the rejection of the null hypothesis, a _____.

(Multiple Choice)

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Question 56

For a sample size of 30, changing from using the standard normal distribution to using the t distribution in a hypothesis test _____.

(Multiple Choice)

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Question 57

An example of statistical inference is _____.

(Multiple Choice)

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Question 58

The rejection region for a one-tailed hypothesis test _____.

(Multiple Choice)

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Question 59

The smaller the p-value, the _____.

(Multiple Choice)

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Question 60

Showing 41 - 60 of 81

As a general guideline, the research hypothesis should be stated as the _____.

Your investment executive claims that the average yearly rate of return on the stocks she recommends is at least 10.0%. You plan on taking a sample to test her claim. The correct set of hypotheses is _____.

If a hypothesis is rejected at a 5% level of significance, it _____.

A one-tailed test is a hypothesis test in which rejection region is _____.

A p-value is the _____.

Read the t statistic from the table of t distributions and circle the correct answer. A one-tailed test (lower tail), a sample size of 10 at a .10 level of significance; t = _____.

The level of significance in hypothesis testing is the probability of _____.

When the hypotheses H₀: μ ≥ 100 and H_a: μ < 100 are being tested at a level of significance of α, the null hypothesis will be rejected if the test statistic z is _____.

A student believes that the average grade on the final examination in statistics is at least 85. She plans on taking a sample to test her belief. The correct set of hypotheses is _____.

When the p-value is used for hypothesis testing, the null hypothesis is rejected if _____.

Read the t statistic from the table of t distributions and circle the correct answer. A one-tailed test (upper tail), a sample size of 18 at a .05 level of significance; t = _____.

More evidence against H₀ is indicated by _____.

If a hypothesis test leads to the rejection of the null hypothesis, a _____.

For a sample size of 30, changing from using the standard normal distribution to using the t distribution in a hypothesis test _____.

An example of statistical inference is _____.

The rejection region for a one-tailed hypothesis test _____.

The smaller the p-value, the _____.

Data and Statistics

Descriptive Statistics: Tabular and Graphical Displays

Descriptive Statistics: Numerical Measures

Introduction to Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling and Sampling Distributions

Interval Estimation

Inference About Means and Proportions With Two Populations

Inferences About Population Variances

Tests of Goodness of Fit, Independence, and Multiple Proportions

Experimental Design and Analysis of Variance

Simple Linear Regression

Multiple Regression

Regression Analysis: Model Building

Time Series Analysis and Forecasting

Nonparametric Methods

Statistical Methods for Quality Control

Decision Analysis

Sample Survey

Filters

Exam 9: Hypothesis Tests

As a general guideline, the research hypothesis should be stated as the _____.

Your investment executive claims that the average yearly rate of return on the stocks she recommends is at least 10.0%. You plan on taking a sample to test her claim. The correct set of hypotheses is _____.

If a hypothesis is rejected at a 5% level of significance, it _____.

A one-tailed test is a hypothesis test in which rejection region is _____.

A p-value is the _____.

Read the t statistic from the table of t distributions and circle the correct answer. A one-tailed test (lower tail), a sample size of 10 at a .10 level of significance; t = _____.

The level of significance in hypothesis testing is the probability of _____.

When the hypotheses H0: μ ≥ 100 and Ha: μ < 100 are being tested at a level of significance of α, the null hypothesis will be rejected if the test statistic z is _____.

A student believes that the average grade on the final examination in statistics is at least 85. She plans on taking a sample to test her belief. The correct set of hypotheses is _____.

When the p-value is used for hypothesis testing, the null hypothesis is rejected if _____.

Read the t statistic from the table of t distributions and circle the correct answer. A one-tailed test (upper tail), a sample size of 18 at a .05 level of significance; t = _____.

More evidence against H0 is indicated by _____.

If a hypothesis test leads to the rejection of the null hypothesis, a _____.

For a sample size of 30, changing from using the standard normal distribution to using the t distribution in a hypothesis test _____.

An example of statistical inference is _____.

The rejection region for a one-tailed hypothesis test _____.

The smaller the p-value, the _____.

Data and Statistics

Descriptive Statistics: Tabular and Graphical Displays

Descriptive Statistics: Numerical Measures

Introduction to Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling and Sampling Distributions

Interval Estimation

Inference About Means and Proportions With Two Populations

Inferences About Population Variances

Tests of Goodness of Fit, Independence, and Multiple Proportions

Experimental Design and Analysis of Variance

Simple Linear Regression

Multiple Regression

Regression Analysis: Model Building

Time Series Analysis and Forecasting

Nonparametric Methods

Statistical Methods for Quality Control

Decision Analysis

Sample Survey

Filters

When the hypotheses H₀: μ ≥ 100 and H_a: μ < 100 are being tested at a level of significance of α, the null hypothesis will be rejected if the test statistic z is _____.

More evidence against H₀ is indicated by _____.