MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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State the null and alternative hypotheses for the following statement and the type of test being performed.
The dean of a major university claims that the
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- Assume 50 random samples of the same sample size are taken from a population, and a 90% confidence interval is constructed from each sample. How many of the intervals would you expect to contain the true population meanarrow_forward19% of deaths among male adults can be attributed to heart diseases. Is this percentage different among residents in Sonoma County? State the Null and Alternative hypothses. H0:H0: ? μ p Select an answer > = ≠ < Ha:Ha: ? μ p Select an answer < = > ≠arrow_forwardClassify the proposed hypothesis test as Two tailed, Left tailed, or Right tailed. A researcher is interested in determining whether men who have completed a postgraduate degree (master's or Phd) have greater earning potential than those who have completed a Bachelor's degree only. She will perform a hypothesis test to determine whether the mean salary of men who have completed a postgraduate degree is greater than the mean salary of men with a Bachelor's degree only.arrow_forward
- Suppose 231 subjects are treated with a drug that is used to treat pain and 51 of them developed nausea. Use a 0.10 significance level to test the claim that more than 20% of users develop nausea. Identify the null and alternative hypotheses for this test. Choose the correct answer below. A. Ho: p=0.20 H₁: p>0.20 O B. Ho: p=0.20 H₁: p0.20 O C. Ho: p>0.20 H₁: p=0.20 D. Ho: p=0.20 H₁: p<0.20 Identify the test statistic for this hypothesis test. The test statistic for this hypothesis test is (Round to two decimal places as needed.) Identify the P-value for this hypothesis test. The P-value for this hypothesis test is (Round to three decimal places as needed.)arrow_forwardWhich has the greatest standard error? mean=20, s.d.=10, n=9 mean=30, s.d.=15, n=16 mean=40, s.d.=20, n=25 mean=50, s.d.=25, n=36arrow_forwardSuppose you want to test the claim that a population mean equals 38. State the null hypothesis.arrow_forward
- Probability is an important concept for researchers primarily because a. it is used to compare data collected from samples to the population b. it is used to develop statistical hypotheses such as the null hypothesis and alternative hypothesis c. most research involves flipping coins and pulling aces out of a deck of cards. d. it is used to prove a study’s research hypothesesarrow_forwardSuppose it is generally accepted that 40% of consumers use Apple products. You believe that the percentage is greater. You take a sample of 600 consumers and find that 270 of them use Apple products. Conduct a hypothesis test. Assuming the null is true, what is the mean of the population? Assuming the null is true, how far, on average, should a sample proportion be from the expected?arrow_forwardSuppose you are asked to conduct a two-tailed hypothesis test on the population mean. What type of hypothesis test would you use? Why? What assumptions do you need to make about the process when you are conducting a hypothesis test on the population mean in order for your results to be valid?arrow_forward
- Past studies have indicated that the percentage of smokers was estimated to be about 30%. Given the new smoking cessation programs that have been implemented, you now believe that the percentage of smokers has reduced. You randomly surveyed 1775 people and found that 492 smoke. Use a 0.05 significance level to test the claim that the percentage of smokers has reduced. a) Identify the null and alternative hypotheses? Ho: ? v Ha: ? v b) What type of hypothesis test should you conduct (left-, right-, or two-tailed))? O left-tailed O right-tailed O two-tailed c) Identify the appropriate significance level. Submit Question % & 8. 5.arrow_forwardYour teacher claims to produce random numbers from 1 to 5 (inclusive) on her calculator, but you’ve been keeping track. In the past 80 rolls, the number “five” has come up only 8 times. You suspect that the calculator is producing fewer fives than it should. Let p = actual long-run proportion of five’s produced by the calculator. The hypotheses for testing the teacher’s claim are:arrow_forwardSuppose 239 subjects are treated with a drug that is used to treat pain and 52 of them developed nausea. Use a 0.10 significance level to test the claim that more than 20% of users develop nausea. Identify the null and alternative hypotheses for this test. Choose the correct answer below. A. Ho: p=0.20 H₁ :p #0.20 B. Ho: p=0.20 H₁: p > 0.20 C. Ho: p=0.20 H₁: p0.20 H₁: p=0.20 Identify the test statistic for this hypothesis test. The test statistic for this hypothesis test is (Round to two decimal places as needed.)arrow_forward
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