Introductory Statistics (10th Edition)
Introductory Statistics (10th Edition)
10th Edition
ISBN: 9780321989178
Author: Neil A. Weiss
Publisher: PEARSON
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Chapter 9, Problem 1RP

Explain the meaning of each term.

  1. a. null hypothesis
  2. b. alternative hypothesis
  3. c. test statistic
  4. d. significance level

(a)

Expert Solution
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To determine

Explain the meaning of null hypothesis.

Explanation of Solution

Null hypothesis:

Null hypothesis is a statement about population parameter, its value is equal to the claim value, which is denoted by H0. The population parameter can be mean, standard deviation, proportion, variance, and so on. The possible symbols used in the null hypothesis would be , or =.

(b)

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To determine

Explain the meaning of alternative hypothesis.

Explanation of Solution

Alternative hypothesis:

It is complementary to the null hypothesis. That is, it differs from the null hypothesis. The possible symbols used in the alternative hypothesis would be <,>, or ≠. It is denoted by Ha.

  1. 1. If the sign is < or > then the test is called as one-tailed test.
  2. 2. If the sign is ≠. Then the test is called as two-tailed test.

(c)

Expert Solution
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To determine

Explain the meaning of test statistic.

Explanation of Solution

Test statistic:

This is a numerical value calculated from sample data by which it can be concluded whether the null hypothesis would be rejected or accepted in a hypothesis testing.

(d)

Expert Solution
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To determine

Explain the meaning of level of significance.

Explanation of Solution

Significance level:

The probability of rejecting a true null hypothesis is called as a level of significance.

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Chapter 9 Solutions

Introductory Statistics (10th Edition)

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When...Ch. 9.3 - Explain how the P-value is obtained for a one-mean...Ch. 9.3 - True or false: The P-value is the smallest...Ch. 9.3 - The P-value for a hypothesis test is 0.06. For...Ch. 9.3 - The P-value for a hypothesis test is 0.083. For...Ch. 9.3 - Which provides stronger evidence against the null...Ch. 9.3 - Which provides stronger evidence against the null...Ch. 9.3 - In each of Exercises 9.559.62, we have given the...Ch. 9.3 - In each of Exercises 9.559.62, we have given the...Ch. 9.3 - In each of Exercises 9.559.62, we have given the...Ch. 9.3 - In each of Exercises 9.559.62, we have given the...Ch. 9.3 - Prob. 59ECh. 9.3 - Prob. 60ECh. 9.3 - Prob. 61ECh. 9.3 - Prob. 62ECh. 9.3 - In Exercises 9.639.68, we have given the value...Ch. 9.3 - In Exercises 9.639.68, we have given the value...Ch. 9.3 - In Exercises 9.639.68, we have given the value...Ch. 9.3 - In Exercises 9.639.68, we have given the value...Ch. 9.3 - In Exercises 9.63-9.68, we have given the value...Ch. 9.3 - In Exercises 9.639.68, we have given the value...Ch. 9.3 - Consider a one-mean z-test. Denote z0 as the...Ch. 9.3 - Prob. 70ECh. 9.3 - Obtaining the P-value. Let x denote the test...Ch. 9.4 - Explain why considering outliers is important when...Ch. 9.4 - Prob. 73ECh. 9.4 - Prob. 74ECh. 9.4 - Prob. 75ECh. 9.4 - Prob. 76ECh. 9.4 - Prob. 77ECh. 9.4 - Prob. 78ECh. 9.4 - Prob. 79ECh. 9.4 - Prob. 80ECh. 9.4 - Prob. 81ECh. 9.4 - Prob. 82ECh. 9.4 - Preliminary data analyses indicate that applying...Ch. 9.4 - Preliminary data analyses indicate that applying...Ch. 9.4 - Preliminary data analyses indicate that applying...Ch. 9.4 - Preliminary data analyses indicate that applying...Ch. 9.4 - Preliminary data analyses indicate that applying...Ch. 9.4 - Preliminary data analyses indicate that applying...Ch. 9.4 - Job Gains and Losses. In the article Business...Ch. 9.4 - Hotels and Motels. The daily charges, in dollars,...Ch. 9.4 - Body Temperature. A study by researchers at the...Ch. 9.4 - Teacher Salaries. Data on salaries in the public...Ch. 9.4 - Cell Phones. 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