4.24 Ivy is not sure whether a particular coin is fair. She flips the coin 100 times and decides thatthe coin is not fair if she observes 40 or fewer heads, or 60 or more heads. State the nulland alternative hypotheses Ho and H1, calculate the significance level a, and plot the powerfunction associated with her test.

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MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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You are conducting a multinomial hypothesis test for the claim that the 4 categories occur with the following frequencies: Complete the table. Category A B C D 40 32 Observed Expected Squared Frequency Frequency Residual 10 Ho: PA 21 = 0.5; PB = 0.3; pc = 0.1; PD = 0.1 What is the chi-square test-statistic for this data? x² = Report all answers accurate to three decimal places.
Only numbers 3 and 4
Under what condition is the interpretation of Pearson's r and Cramer's V the same? a. Pearson's r and Cramer's V are never interpreted in the same way b. when a chi-square analysis is conducted with higher-order data c. when the null hypothesis is rejected d. when dfRC = 1
*11. Show that for the two-tailed test, the p-value is: Vn(Y – 60) 2 1- ¢
7.16 Using an app or the Web on a smartphone. The Nielsen Company reports that U.S. residents aged 18 to 34 years spend an average of 2.83 hours per day using an app or the Web on a smartphones You wonder if this it true for students at your large university because you rarely see students not using their smartphones. You collect an SRS of n = 75 students and obtain 2 = 3.17 hours with s =1.36 hours. (a) Report the 95% confidence interval for u, the average number of hours per month that students at your university use the Internet on a computer. (b) Use this interval to test whether the average time for students at your university is different from the average, reported by Nielsen. Use the 5% significance level. Summarize your results.
Adults tend to believe that a majority of teenagers sleep in on Saturdays, but maybe that is a misconception. A random sample of 120 teenagers showed that 48 slept in the previous Saturday. Use the computer output provided below to determine if there is convincing evidence at the α = 0.05 level that the true proportion of teenagers who slept in on the previous Saturday is less than 0.5. Use this computer output to answer the questions. Because the P-value α, we H0. We convincing evidence that the true proportion of teenagers who slept in on the previous Saturday is .
Question 6 please
Need help in part B
suppose media reports that only 37% of doctors recommend wearing face masks.You suspect this is incorrect, so you sample 66 random doctors and find that 15 of them recommend wearing face masks. State the alternative hypotheses of this test. Alternative Hypothesis (Ha):p = To test our hypothesis, we will assume that p= What is the value of np rounded to 2 decimal places? What is the value of n(1−p) rounded to 2 decimal places? Is the success-failure condition of the Central Limit Theorem satisfied? Yes. Both npnp and n(1−p)n(1-p) are ≥15≥15. No. Either np<15np<15 or n(1−p)<15n(1-p)<15. multiple choice (5)
Benford's Law claims that numbers chosen from very large data files tend to have "1" as the first nonzero digit disproportionately often. In fact, research has shown that if you randomly draw a number from a very large data file, the probability of getting a number with "1" as the leading digit is about 0.301. Suppose you are an auditor for a very large corporation. The revenue report involves millions of numbers in a large computer file. Let us say you took a random sample of n = 250 numerical entries from the file and r = 60 of the entries had a first nonzero digit of 1. Let p represent the population proportion of all numbers in the corporate file that have a first nonzero digit of 1. Test the claim that p is less than 0.301 by using α = 0.01. What does the area of the sampling distribution corresponding to your P-value look like? a. The area in the right tail of the standard normal curve. b. The area not including the right tail of the standard normal curve.…

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Ivy is not sure whether a particular c the coin is not fair if she observes 4 4.24 and alternative hypotheses Ho and H function associated with her test.