King Tut was an ancient Egyptian ruler whose tomb was discovered and opened in 1923. Legend has it that the archaeologists whoopened the tomb were subject to a "mummy's curse," which would shorten their life spans. An article presents an investigation of themummy's curse. The article reports that 24 people exposed to the curse had a mean life span of 72.0 years with a standard deviationof 12.4 years, while a sample of 9 Westerners in Egypt at the time who were not exposed to the curse had a mean life span of 77.0years with a standard deviation of 13.6 years. Can you conclude that the mean life span of those exposed to the mummy's curse is lessthan the mean of those not exposed? Find the P-value and state a conclusion.3 conclude that the mean life span of those exposed to the mummy's curse is less thanSinceP>04Othe mean of those not exposed., we cannot

Given Data : For Sample 1 x̄1 = 72.0 s1 = 12.4 n1 = 24 For Sample 2…

Answered: King Tut was an ancient Egyptian ruler…

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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Part 1 of 4 Victoria, an accomplished marathon runner, claims that the standard deviation for her time to run a 26.2 mile marathon is less than 17.5 minutes. To test her claim, Victoria looks up 11 of her race times (in minutes): 227.2, 233.3, 259.7, 265.8, 252.1, 228.8, 222.6, 202.9, 214.5, 237.2, 267.7 Perform a hypothesis test using a 9% level of significance to test Victoria's claim. Step 1: State the null and alternative hypotheses. 17.5 Ha:0
Question 2 A survey recently reported that the mean national annual expenditure for inpatient and outpatient services of all persons over 64 years of age was $5,423 with a standard deviation of $979. A random sample of 352 persons over age 64 living in Sudbury had an average expense of $5,516. a) Can we conclude that the mean inpatient and outpatient expense of all Sudbury residents over age 64 is higher than the national average of $5,423? Use the 0.01 level of significance. b) Calculate the P-value for this test. Would your answer have changed if you had used a 0.05 level of significance? c) The P-value is not the probability that is true. Discuss this claim, stating your position explicitly.
Question 3: The waiting times (in minutes) of a random sample of 22 people at a bank have a sample standard deviation of 3.6 minutes. Assume the sample is from a normally distributed population. Use a 98% level of confidence to construct the confidence intervals for (a) the population variance and (b) the population standard deviation. Interpret the results.
Section 9.2 Question #8 Listed below are time intervals (min) between eruptions of a geyser. Assume that the "recent" times are within the past few years, the "past" times are from around 20 years ago, and that the two samples are independent simple random samples selected from normally distributed populations. Do not assume that the population standard deviations are equal. Does it appear that the mean time interval has changed? Is the conclusion affected by whether the significance level is 0.10 or 0.01? Recent 77 91 90 78 57 100 61 87 69 89 83 83 55 81 73 101 61 Past 90 89 93 94 64 85 85 92 88 91 89 91 Let μ1 be the recent times and let μ2 be the past times. What are the null and alternative hypotheses? A. H0: μ1 = μ2 H1: μ1 ≠ μ2 B. H0: μ1 < μ2 H1: μ1 = μ2 C. H0: μ1 = μ2 H1: μ1 > μ2 D. H0: μ1 ≠ μ2…
Question 6
Question 7: Weight loss: In a study to determine whether counseling could help people lose weight, a sample of people experienced a group-based behavioral intervention, which involved weekly meetings with a trained interventionist for a period of six months. The following data are the numbers of pounds lost for 14 people. Assume the population is approximately normal. Perform a hypothesis test to determine whether the mean weight loss is greater than 13 pounds. Use the a=0.05 level of significance and the P-value method with the TI-84 Plus calculator. 21.2 27.5 6.5 22.8 20 11.5 16.2 19.7 36.3 32.5 11.1 34.8 22.4 17.9 Part 1: (a) State the appropriate null and alternate hypotheses. H0: (BLANK) H1:(BLANK) This hypothesis test is a (BLANK) tests. Answer Choice: Left-Tailed Right-Tailed Two-Tailed Part 2: (b) Compute the value of the test statistic. Round the answer to at least three decimal places. t = (BLANK) Part 3: (c) Compute the P-value. Round the answer to at…
Question 20. part b. Nationally, patients who go to the emergency room wait an average of 7 hours to be admitted into the hospital. Do patients at rural hospitals have a lower waiting time? The 14 randomly selected patients who went to the emergency room at rural hospitals waited an average of 5.8 hours to be admitted into the hospital. The standard deviation for these 14 patients was 1.7 hours. What can be concluded at the the αα = 0.05 level of significance level of significance? C.)The test statistic ?, z or t = ____ (please show your answer to 3 decimal places.) D.)The p-value = ______ (Please show your answer to 4 decimal places.) E.) The p-value is ?, ≤ , > α

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