Unit 3 Lesson 1: Basics of Hypothesis Testing

Pataasin ang iyong marka sa homework at exams ngayon gamit ang Quizwiz!

Assume the percentage of on-time U.S. airline flights is less than 75%. Also assume that the initial conclusion rejects the null hypothesis. State the final conclusion in simple, nontechnical terms.

A. There is sufficient evidence to support the claim that the percentage of on-time U.S. airline flights is less than 75%

Assume the normal distribution applies to a scenario where you are given H1: p<0.08 in a test using a significance level of a=0.01. Find the critical z value(s)

A. z = -2.33

Given that a test statistic in a left-tailed test is z= - 1.25, use a 0.05 significance level to find the P-value and state the conclusion about the null hypothesis

B. 0.1056; fail to reject the null hypothesis

The standard deviation of duration times (in seconds) of the Old Faithful geyser is less than 40 sec. Identify the null hypothesis and alternative hypothesis in symbolic form.

B. H0: σ= 40 sec; H1: σ<40 sec

Given that a test statistic in a right-tailed test uses a significance level of a=0.02, assume the normal distribution applies and find the critical z value(s)

B. z = 2.05

The majority of college students have credit cards. Identify the null hypothesis and alternative hypothesis in symbolic form.

C. H0: P=0.5; H1: p > 0.5

Assume the normal distribution applies to a scenario where you are given H1: p≠ 0.6 in a test using a significance level of a=0.005. Find the critical z value(s)

C. z = ±2.81

With H1: P>0.75, a test statistic is z=0.55. Use a 0.05 significance level to find the P-value, and state the conclusion about the null hypothesis

D. 0.2912; fail to reject the null hypothesis

The standard deviation of human body temperatures is equal to 0.62F. Identify the null hypothesis and alternative hypothesis in symbolic form

D. H0: σ=0.62F; H1: σ ≠ 0.62F

It is claimed that more than 75% of adults always wear a seat belt in the front seat. A poll of 1012 adults resulted in 870 who say that they always wear a seat belt in the front seat. Find the value of the test statistic z using

D. z = 8.06


Kaugnay na mga set ng pag-aaral

EMT Chapter 9 Patient Assessment

View Set

Chapter 48: Estrogens and Progestins: Basic Pharmacology and Noncontraceptive Applications, Chapter 49: Birth Control, Chapter 50: Androgens, Chapter 51: Drugs for Erectile Dysfunction and Benign Prostatic Hyperplasia, Chapter 43: Drugs for Angina Pe...

View Set

Marketing research Test One Chapter 3

View Set

Based on Orientation and The Way to Test

View Set

Family violence Final Exam Study Guide

View Set