Back in April and May of 1985, the Gallup organization conducted a poll to estimate the percentage of Americans who approved of how President Reagan was handling his job. At the 5% significance level, do the data suggest that the percentage of those who approved of Reagan increased from April to May in 1985? Population 1: April p = 795/1528 = 0.5203Population 2: May p = 840/1528 = 0.5497Show all your steps, setting up your null and alternative hypothesis.

Thirty-three percent of all Americans drink bottled water more than once a week (Natural resources Defense Council, December 4, 2015). Suppose you have been hired by the Natural Resources Defence Council to investigate bottled water consumption in St. Paul. You plan to select a sample of St. Paulites to estimate the proportion who drink bottled water more than once a week. Assume the popluation proportion of St. Paulites who drink bottled water more than once a week is 0.33 , the same as the overall proportion of Americans who drink bottled water more than once a week. Use z-table. b. Based upon a sample of  540 St. Paulites, what is the probability that the sample proportion will be within  of the population proportion (to 4 decimals). probability =_____ d. Based upon a smaller sample of only  200 St. Paulites, what is the probability that the sample proportion will be within 0.01 of the population proportion (to 4 decimals). probability=_____

5. For 2019, the mean fare to fly from Los Angeles to Miami was $250 on Aero Lindvallia. In December 2021, nine flights were randomly surveyed resulting in the following ticket price data being recorded: $ 321 $ 280 24 $ 286 $ 299 $310 $ 275 $ 250 $ 270 $ 281 The numbers above can be copied & pasted directly into Microsoft Excel®. a. What test would you use to determine if the ticket prices had gone up or down? Is it a one-tailed or two-tailed test? Explain. b. Calculate the necessary statistics to perform that test. c. Using the 6-step hypothesis testing procedure, perform the test that you described above. Use a level of significance of 0.01. Comment on each step of the 6-step hypothesis testing procedure; especially explain why a t-distribution must be used. d. Compute the p-value. Would the results of the hypothesis test change if the level of significance was 0.05? se ecA u

The question is as follows: If 23 more HRDs responded to the survey, which of the following is the best estimate of the number of people employed by the 23 organisations these HRD represent? A. 95,907  B. 117, 965 C. 2,206,000 D. 3,308,780 E. 15,379,628 Please see attachments. Thanks

Bank of America's Consumer Spending Survey collected data on annual credit card charges in seven different categories of expenditures: transportation, groceries, dining out, household expenses, home furnishings, apparel, and entertainment. Using data from a sample of 42 credit card accounts, assume that each account was used to identify the annual credit card charges for groceries (population 1) and the annual credit card charges for dining out (population 2). Using the difference data, the sample mean difference was d = $850 , and the sample standard deviation was sa = $1,123. a. Formulate the null and alternative hypotheses to test for no difference between the population mean credit card charges for groceries and the population mean credit card charges for dining out. Ho : Hd is equal to 0 Ha : Hd is less than or equal to 0 b. Use a = 0.05 level of significance. Can you conclude that the population means differ? differ What is the p-value? (to 6 decimals) C. Which category,…

The British Department of Transportation studied to see if people avoid driving on Friday the 13th. They did a traffic count on a Friday and then again on a Friday the 13th at the same two locations. The data for each location on the two different dates is in the table. Do the data show that on average fewer people drive on Friday the 13th? Test at the 10% level. Traffic Count 6th 13th 1990, July 138998 138877 1990, July 135438 136187 1991, September 132918 129920 1991, September 136810 133914 1991, December 124545 120192 1991, December 128339 125776 1992, March 122024 118128 1992, March 124013 120800 1992, November 136759 134911 1992, November 123410 122447 Dates State the null and alternative hypotheses. Ho: Hd ? ✓ Ha: Hd ? ✓ Calculate the test statistic. Round to four decimal places. d= Calculate the standardized test statistic. Round three decimal places. t = Find the p-value. Round to four decimal places. p-value = State your decision. O Since the p-value is greater than .10,…

1. In a survey, 957 internet users chose to respond to this question posted on ratemyprofessors.com: How helpful are the reviews on this website? 92% of the respondents said “Very Helpful”.    a. Determine whether the study is an experimental or an observational study.  b. Identify the sample and the population.  c. Is the value 92% a statistic or a parameter?  d. Identify a major problem with the study.

x Resorts & Spas, a magazine devoted to upscale vacations and accommodations, published its Reader's Choice List of the top 20 independent beachfront boutique hotels in the world. The data shown are the scores received by these hotels based on the results from Resorts & Spas' annual Readers' Choice Survey. Each score represents the percentage of respondents who rated a hotel as excellent or very good on one of three criteria (comfort, amenities, and in-house dining). An overall score was also reported and used to rank the hotels. The highest ranked hotel, the Muri Beach Odyssey, has an overall score of 94.3, the highest component of which is 97.7 for in-house dining. If required, round your answer to three decimal places. Click on the datafile logo to reference the data.       Hotel Overall Comfort Amenities In-House Dining     Muri Beach Odyssey 94.3 94.5 90.8   97.7     Pattaya Resort 92.9 96.6 84.1   96.6     Sojourner's Respite 92.8 99.9 100.0   88.4…

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According to the 2016 Consumer Expenditure Survey, Americans spend an average of $1,124 on cellular phone service annually (U.S. Bureau of Labor Statistics website). Suppose that we wish to determine if there are differences in cellular phone expenditures by age group. Therefore, samples of 10 consumers were selected for three age groups (1834, 35- 44, 45 and older). The annual expenditure for each person in the sample is provided in the table below. Click on the datafile logo to reference the data. DATA file 35-44 969 434 1,792 1,500 1,277 1,056 1,922 1,350 18 - 34 1,355 115 1,456 2,045 1,621 994 1,937 1,200 1,567 1,390 a. Compute the mean, variance, and standard deviation for each of these three samples. Round your answers to one decimal place. 18-34 35-44 45+ 1,586 1,415 45 and Older 1,135 956 400 1,374 1,244 825 763 1,192 1,305 1,510 Mean = Variance Standard Deviation b. What observations can be made based on these data? The age group that spends the least amount on cellular phone…