Please answer the marked questions..........
Please show your work.............
Please answer the marked questions.......... Please show your work............. that all young adult men is greater...
Please answer the marked questions.......... Please show your work............. you know that th 100, at the b. Repeat part (a) assuming that ulation standard deviation is ơ the conclusions produced (a) assuming that you know that the n standard deviation is ơ 3( In art c. Explain why arts (a) and (b) are virtually identical, the interval estimate produced in narrower than that in part (a). why ling 1,000 membersofa normal popula- Applications nd 15,500 ands 9,950. Estimate The following...
Complete entire problem, showing ALL work so the learner can transpose into a notebook. 3. (SECTION 11.2) Spam e-mail has become a serious and costly nuisance. An office manager believes that the average amount of time spent by office workers reading and deleting sparn is NOT 25 minutes per day. To test this beliel, he takes a random sample of 18 workers and measures the amount of time each spends reading and deleting spam. The results are listed here. If...
Please show hand written work for everything including formulas etc. For problems 9, 10, 11, and 12, solve the problems by answering a) State the claim (use a sentence), b) H, H and place the claim with either one of the two. c) Test statistic, show and label the formula you use. d) Find critical value(s), and reject Ho or fail to reject Ho. You may use ap-value. e) Write a formal conclusion and final statement 11. A golf balls...
Please answer the marked questions.......... Please show your work............. of 18 and s25. Test nough evidence infer that the on the package. A random sample ers whose packaging states that the contents weigh 8 ounces was drawn. The contents were weighed and the results follow. Can we conclude at the 1% significance level that on average the containers are know that the mislabeled? produced in tical. with α .05 = 1,000. 7.80 7.91 7.93 7.99 7.94 7.75 7.97 7.95 7.79...
cording to a survey, the average young adult male plays video games for 4 hours per week. To test fthe amount of video male plays video games for 4 hours per week. To test if the amount of video est, at a 5% significance level. She surveys 28 male college students randomly and asks them about their amount of video games each week on average. games in college is more than the national average, a researcher decides to do a...
show work please Problem 2: Use the following to answer questions a)-e): A random sample of 48 students at a large university reported getting an average of 7 hours of sleep on weeknights, with standard deviation 1.62 hours. A dotplot of the data is provided. 9.6 Weekniaht Sleep a. Briefly explain why it is reasonable to use a t-distribution to perform inference about the mean amount of weeknight sleep for students at this university. (2 points) The research question: It...
Please answer all questions below: 1.) Claim: Carzz Magazine claims that the Civic Hybrid gets exactly 38 mpg on the highway. A random sample of 49 revealed a mean of 38.99 mpg. Use the traditional method at a 12% significance level to test the claim assuming a known population standard deviation of 3.42. Critical z-Score = [three decimal accuracy] Test Statistic = [three decimal accuracy] 2.) Claim: The average career length for an NFL kicker is less than 4.8 years....
Answer ALL questions please! 1. Records of 40 used passenger cars and 40 used pickup trucks (none used commercially) were randomly selected to investigate whether there was any difference in the mean time in years that they were kept by the original owner before being sold. For cars the mean was 5.3 years with standard deviation 2.2 years. For pickup trucks the mean was 7.1 years with standard deviation 3.0 years. a. Construct the 95% confidence interval for the difference...
please show work/calculator steps III. Short Answer: Place your final answers in the blanks provided. (#6 & #7 are worth 10 pts. each) 6. You wish to invest in socially responsible stocks but fear that they may be overpriced as measured by the P/E, the Price-to-Earnings ratio. The average P/E Ratio for the S&P Index is 15.74, and the standard deviation is not known. You take a random sample of 32 socially conscious stocks and find the P/E sample mean...
7. The manufacturer of a certain brand of auto batteries claims the mean life of these batteries is 45 months. A consumer protection agency that wants to check thisclaim took a random sample of 36 such batteries and found the mean life for this sample is 43.75 months with a standard deviation of 4.5 months.a. Find the p-value for the test of hypothesis with the alternative hypothesis that the mean life of these batteries is less than 45 months.b. Would...