For Exercises 5–8: (a) State the null hypothesis and the alternate hypothesis. (b) State the decision rule. (c) Compute the value of the test statistic. (d) What is your decision regarding H0? (e) What is the p-value? Interpret it.
5. The manufacturer of the X-15 steel-belted radial truck tire claims that the
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- bartam 40. GUeTticient of skewness and interpret the result : Age below (yrs) No. of employees 25 8. 30 20 35 40 40 65 45 80 50 92 55 100arrow_forwardTourism is extremely important to the economy of Florida. Hotel occupancy is an often-reported measure of visitor volume and visitor activity (Orlando Sentinel, May 19, 2018). Hotel occupancy data for February in two consecutive years are as follows. Current Year (1) Previous Year (2) 1458 1800 Occupied Rooms (X) 1470 Total Rooms (n) 1750 Formulate the hypothesis test can be used to determine whether there has been an increase in the proportion of rooms occupied over the one-year period. Oa. Ho: p1=p2 vs Ob. Ho: p1> p2 vs Oc. Ho: p1=p2 vs Od. Ho: p1=p2 vs Ha: p1>p2 Ha: p1=p2 Ha: p1arrow_forward$292,700 with o = $60,000. A local real Assume that the average home price in the U.S. is u = estate company in Ohio believes that the average home price in a well-esteemed neighborhood is higher than the national average. The real estate company takes a random sample of 36 homes from this neighborhood and finds that X = 310,000. Do homes in this neighborhood cost more than the U.S. average? Assume a = .10. Please show the four-step hypothesis test.arrow_forward1arrow_forwardExercise 1.10 1. Cheryl has taken two quizzes in her history class. She scored 15 on the first quiz, for which the mean of all scores was 12 and the standard deviation was 2.4. Her score on the second quiz, for which the mean of all scores was 11 and the standard deviation was 2.0, was 14. In comparison to her classmates, did Cheryl do better on the first quiz or the second quiz? 2. Roland received a score of 70 for which the mean score was 65.5. Roland has learned that the z- score for his test is 0.6. What is the standard deviation for this set of test scores? 3. A data set has a mean of i = 75 and a standard deviation of 11.5. Find the z-score for each of the following: a. x = 85 b. x = 95 c. x = 50 d. x = 75 4. A random sample of 1000 oranges showed that the mean amount of juice per orange was 7.4 fluid ounces, with a standard deviation of 1.1 fluid ounces. a. Determine the z-score, to the nearest hundredth, of an orange that produced 6.6 fluid ounces of juice. b. The z-score for…arrow_forwardDo men take less time than women to get out of bed in the morning? The 42 men observed averaged 7.6 minutes to get out of bed after the alarm rang. Their standard deviation was 2.2. The 52 women observed averaged 9 minutes and their standard deviation was 2.1 minutes. What can be concluded at the a = :0.01 %3D level of significance?arrow_forwardTourism is extremely important to the economy of Florida. Hotel occupancy is an often-reported measure of visitor volume and visitor activity (Orlando Sentinel, May 19, 2018). Hotel occupancy data for February in two consecutive years are as follows. Ho: P1 P2 less than or equal to 0 Ha P1 P2 greater than 0 b. What is the estimated proportion of hotel rooms occupied each year (to 2 decimals)? 1,435 1,750 1,422 1,800 a. Formulate the hypothesis test that can be used to determine whether there has been an increase in the proportion of rooms occupied over the one-year period. Let P1 = population proportion of rooms occupied for current year P2 = population proportion of rooms occupied for previous year Current year Previous Year .82 .05 p-value = .7997 Using a 0.05 level of significance, what is your conclusion? .014 c. Conduct a hypothesis test. What is the p-value (to 4 decimals)? Use Table 1 from Appendix B. to .066 Do you think area officials would be pleased with the results?…arrow_forwardConduct a hypothesis test to determine if the data provide evidence that the mean pounds of product produced in an hour is greater than 33,000. What is the null and alternate hypothesis?arrow_forwardThe following model predicts credit card acceptance (yes) as follows: p-value (0.001) (0.001) (<0.001) Here the response variable, CardAcceptance-1 if the card is accepted and 0 otherwise What is the effect of BadReport on Card Acceptance? Choose one from below: Intercept BadReports Coefficient Income 1.05 -1.36 0.026 As number of bad reports increases the probability of card acceptance decreases Bad reports has no effect on probability of card acceptance As number of bad reports decreases the probability of card acceptance decreases As the number of bad reports increases the probability of card acceptance increasesarrow_forwardMeteorologists in Texas want to increase the amount of rain delivered by thunderheads by seeding the clouds. Without seeding, thunderheads produce, on average, 300 acre feet. The meteorologists randomly selected 30 clouds which they seeded with silver iodide to test their theory that average acre feet of rain produced is more than 300. Are the conditions met to conduct a One Sample t Test for the mean? Answer choices: Yes, because the data is quantitative. Yes, because the sample size is 30. No, because we don't have np≥10np≥10 and n(1−p)≥10n(1−p)≥10. No, because the data is strongly skewed and has extreme outliers.arrow_forwardExercise 6. Regression Fallacy. Historically, scores on the two midterms had a correlation of 0.48. Suppose that Jeri scored 2.1 standard deviations below the mean on the first midterm. (a) How many standard deviations [above or below?] the mean would you predict for her second midterm?arrow_forwardThe weekly expenditure on groceries of a random sample of 100 family households was recorded. It was estimated that the mean expenditure was approximately $240. With rising interest rates and petrol prices, it was anticipated that grocery expenditure might decrease. Which hypothesis test would you use to test this claim? 1.One tailed, one sample t-test 2.Two tailed, one sample t-test 3.One tailed, z-test 4.One-tailed Paired Samples t-test 5.Chi Squarearrow_forwardarrow_back_iosSEE MORE QUESTIONSarrow_forward_ios
- Glencoe Algebra 1, Student Edition, 9780079039897...AlgebraISBN:9780079039897Author:CarterPublisher:McGraw HillHolt Mcdougal Larson Pre-algebra: Student Edition...AlgebraISBN:9780547587776Author:HOLT MCDOUGALPublisher:HOLT MCDOUGAL