Introduction to the Practice of Statistics: w/CrunchIt/EESEE Access Card
8th Edition
ISBN: 9781464158933
Author: David S. Moore, George P. McCabe, Bruce A. Craig
Publisher: W. H. Freeman
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Chapter 6.4, Problem 112E
To determine
To find: The power against the alternative
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is the proportion of infant colic differs among mothers who smoke and mothers who do not smoke. Show all 5 steps of the hypothesis test. α=0.05.
Target wants to know if their online sales are above what they observed last year during the pandemic. They test Ho: p = 0.45 vs. HA: p > 0.45 and reject
the null hypothesis. Later they find out that actually 45% of their sales were online. Which of the following is true:
Multiple Choice
Type I Error was made
A Correct Decision was made
A researcher selects a sample and administers treatment for anxiety to the individuals in the sample. If the sample is used for a hypothesis test, what does the null hypothesis (H0) put forth about the treatment?
Group of answer choices
The treatment has an effect on anxiety.
The treatment divides each anxiety score by a constant.
The treatment multiplies each anxiety score by a constant.
The treatment has no effect on anxiety.
Chapter 6 Solutions
Introduction to the Practice of Statistics: w/CrunchIt/EESEE Access Card
Ch. 6.1 - Prob. 1UYKCh. 6.1 - Prob. 2UYKCh. 6.1 - Prob. 3UYKCh. 6.1 - Prob. 4UYKCh. 6.1 - Prob. 5UYKCh. 6.1 - Prob. 6UYKCh. 6.1 - Prob. 7UYKCh. 6.1 - Prob. 8UYKCh. 6.1 - Prob. 9UYKCh. 6.1 - Prob. 10UYK
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- Help me solve this 17 parts remaining The claim is that for 9 AM body temperatures of females, the mean is less than 98.6°F. The sample size is n= 33 and the test statistic is t= - 4.786. Use technology to find the P-value. Based on the result, what is the final conclusion? Use a significance level of 0.10. Begin by using the original claim to identify the null hypothesis and the alternative hypothesis for this test. The null hypothesis (denoted by Ho) is a statement that the value of a population parameter (such as proportion, mean, or standard deviation) is equal to some claimed value. The alternative hypothesis (denoted by H, or H, or HA) is a statement that the parameter has a value that somehow differs from the null hypothesis. Print Continuearrow_forwardState whether the standardized test statistic t indicates that you should reject the null hypothesis. Explain. (a) t=2.321 (b) t=0 (c) t=−2.238 (d) t= -2.327arrow_forwardState whether the standardized test statistic t indicates that you should reject the null hypothesis. Explain. (a) t= 2.047 (b) t =0 (c) t= 1.939 (d) t= - 2.034 to = 1.974arrow_forward
- State whether the standardized test statistic t indicates that you should reject the null hypothesis. Explain. xt (a) t= 1.538 (b) t=0 (c) t= 1.489 (d) t= - 1.574 pter Contents essible Resour to =1.533 Is for Success Is for Success (d) For t= - 1.574, should you reject or fail to reject the null hypothesis? Itimedia Librai O A. Fail to reject Ho, because t> 1.533. O B. Fail to reject Ho, because t 1.533. cussions O D. Reject Ho, because t<1.533.arrow_forward#3 Step 1: State the null and alternative hypotheses for the test. Is it, " >, =/, > " Step 2: Compute the value of the test statistic. Round your answer to three decimal places. Step 3:arrow_forwardreview(31a) MAKE SURE YOU SELECT TWO ANSWERS FOR THIS QUESTION.. Type of test and hypotheses. Professor dill wonders if male and female earn significantlly differnent grades, when taking the same course with the same instructor. He randomly samples 160 males. and 100 females. The males receive 20 A's, 32 B's 70 C's 30 D's, anf 8 F's.The female receive 20'A's, 28 B's, 30 C's, and 10 D's. and 12 F's; His hypotheses is that gender and grades are related. Choose the type of test you should choose to test the hypotheses in symbol notation( or in words if symbol is not appropriate) (a) Z test (b)single sample t test (c)dependent t test (d) independent t test (e) Pearson correlation coeffieient. (f) ANOVA (g) chi Square goodness of fit test (h)Chi Square test of independence (i) Ho: u1-u2=0 H1: u1-u2!=0 (j) Ho: u1-u2 =0 H1:u1-u2<0 (k) Ho: u1-u2 >= 0 H1: u1=u2<0 (l) Ho : Rho=0 H1: Rho!=0 (m) Ho: Rho >= 0 H1: Rho <0 (n) Ho:Rho <= 0 H1: Rho >…arrow_forward
- You have just analyzed the results from your experiment, and you calculated p = .13. What conclusions can you make? Select all that apply. You reject the null hypothesis. You accept the null hypothesis. You fail to reject the null hypothesis. You accept the alternative hypothesis.arrow_forwardTest the hypothesis using the P-value approach. Be sure to verify the requirements of the test. Ho: p=0.7 versus H₁: p>0.7 n = 200; x = 145; α = 0.01 Click here to view page of the table Calculate the test statistic, Zo. Zo = (Round to two decimal places as needed.) Click here to view page 2 of the table.arrow_forwardYou perform a hypothesis test for a population proportion with the null hypothesis that the proportion is equal to 0.3. With alpha = 0.05, the test reveals that you do NOT have enough evidence to conclude that p is different from 0.3. If you had done the same test with the same data, but had used alpha = 0.10, what conclusion would you have made? Group of answer choices You would reject the null hypothesis. You would not reject the null hypothesis The answer cannot be determined with the information given.arrow_forward
- Dose there is a claim that a certain population has a mean, μ, that is different than 6. You want to test this claim. To do so, you can ple from the population and perform a hypothesis test at the 0.05 level of significance. To start this test, you write the null hypoth native hypothesis, H₁, as follows. Ho: μ=6 H₁: μ#6 ppose you also know the following information. The value of the test statistic based on the sample is -1.745 (rounded to 3 decimal places). The p-value is 0.081 (rounded to 3 decimal places). (a) Complete the steps below for this hypothesis test. Standard Normal Distribution Step 1: Select one-tailed or two-tailed. O One-tailed O Two-tailed Step 2: Enter the test statistic. (Round to 3 decimal places.) -1.745 Step 3: Shade the area represented by the p-value. Explanation Check Ⓒ2022 McGraw Hill LLC. All Rights Reserved. Termarrow_forwardThe clinical trial for a new drug results in a p-value of 0.045. What decision should the scientists make? We reject the null hypothesis that the drug doesn't work. We accept the null hypothesis that the drug doesn't work. We reject the alternative hypothesis that the drug does work. We accept the alternative hypothesis that the drug does work.arrow_forward
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