Answered: base on the computed z value, what…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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help me answering these questions in math please. answer only no need for long solutions!

on the computedz value, what decision should be made with the null hypothesis?
A. Reject the Null hypothesis
C. Accept the null hypothesis
D. Cannot determine
B. Ignore the null hypothesis
27. Which of the following is the standard deviation of sample proportions?
Po
n
A. Jpą
С.
40
Po4o
D.
В.
72
For items 28 - 30. A certain health magazine stated that 14%% of men said they used exercise to reduce stress. At
a = 0.05, test the claim wherein, from a random sample of 100 men who were selected, 10 said that they used
exercise to relieve stress.
28. From the given information, what is the sample proportion?
C. 0.01
A. 0.14
В. О.1
D. 0.05
29. What is the computed z value?
А. 1.33
В. 2
C. 44.44
D. 10
30. What type of test should be imposed?
A. left-tailed test
C. right-tailed test
D. one-tailed test
B. two-tailed test
31. Which of the following DOES NOT illustrate a bivariate data?
A. In a class, IQ scores and math scores in a long exam ca
B. In monitoring, we can collect from different cars their ages and their mileages.
C. The final grade in Statistics subject.
D. In chemistry, a confined gas can have different volumes and corresponding pressure.
be collected.
32. Which scatterplot shows most likely a positive correlation?
Scatterplot 1
Scatterplot 2
A. I only
B. Il only
C. both I and II
D. neither
33. In terms of strength of association, how do you compare Scatterplot I with II?
Scatterplot 1
Scatterplot 2
A. The strength of association in Scatterplot I is greater.
B. The strength of association in Scatterplot II is greater.
C. The strength of association in both scatterplots is the same.
4

Transcribed Image Text:19. What type of hypothesis is this: "Students using brand A ballpens write better than those using brand B 18. In a z-test of proportions, the computed z lies in the rejection region. This means that: A. The sample proportion is equal to the population proportion. B. The sample proportion is equal to the hypothesized proportion. C. The sample proportion is not equal to the hypothesized proportion. D. The sample proportion is not equal to the population proportion. ballpens." A. Null hypothesis B. Nondirectional hypothesis C. Directional Hypothesis D. none of the above 20. What type of error is committed when you reject a null hypothesis when, in fact, it is true? A. Type 1 B. Type III C. Type II D. Type I, II, and III 21. Suppose it is the Christmas season and Janine thinks that it is the month of January, what error is she committing? A. Type I С. Туре II C. Type III D. Type I, II, and III 22. Which of the following is the CORRECT null and alternative hypotheses of the statement: "The average time to commute from home to school is 35.9 minutes"? A. Ho: u = 35.9 and H,: u = 35.9 B. Ho: H = 35.9 and H: u > 35.9 C. Ho: t = 35.9 and H,: u < 35.9 D. Ho: u = 35.9 and H,: u #35.9 23. Given the hypotheses Ho: t = 23.6 and H: u = 23.6, critical value of +1.96 and the test value of -2.15, which of the following shows the correct rejection region? С. А. D. For items 24- 26. Refer your answer to the given problem below. of women's dresses sold per day is 24. In a random sample of 36 days, it has been found out that the average number of dresses sold is 23 with a standard deviation of 7 dresses. At the 0.05 level of significance, is there a The manager of the women's dress department of a store wants to know whether the true average number sufficient evidence to reject the null hypothesis that u = 24? 24. Which of the following is the CORRECT null and alternative hypotheses? A. Ho: H = 24 and H: u = 24 B. Ho: H = 24 and H,: u # 24 C. Ho: t = 24 and H: u < 24 D. Hg: H = 24 and H: u > 24 |3D 25. What is the computed z value? C. -0.86 A. 0.86 D. -0.76 B. 0.76 B.

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