X Quiz: IB Validity Testing EXAM × ST T Distribution Calculator ActiveStudent % Solved Sof nps.instructure.com/courses/59012/quizzes/297806/take/questions/1474163 11 ath Minnie tosses four coins 80 times. The table shows the distribution of the number of heads obtained in each toss of four coins. Number of heads 0 1 234 Frequency 10 24 26 17 3 Using the binomial distribution B(4, 0.5), find the expected frequencies of obtaining 0, 1, 2, 3 or 4 heads. 0: 4: 1: 2: 3: Perform a goodness of fit test at the 5% significance level to find out whether the data fits a binomial distribution. null hypothesis: alternative hypothesis: chi-squared-statistic: p-value:

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Dataset Available: Download Houston.xlsx You may need to use the appropriate appendix table or technology to answer this question. Data were collected on the amount spent by 64 customers for lunch at a major Houston restaurant. These data are contained in the file Houston. Based upon past studies the population standard deviation is known with a = $6. 20.50 14.63 23.77 29.96 28.87 15.78 18.16. 12.16 18.89 19.88 23.11 20.11 20.34 27.49 36.55 21.18 19.22 34.13 25.53 27.71 33.81 21.79 29.49 32.70 9.20 20.89 11.22 16.43 17.66 9.59 Need Help? Read It 19.16 26.35 20.01 26.85 13.63 17.22 13.17 20.12 22.11 22.47 20.36 35.47 11.85 17.88 6.83 30.99 18.38 26.85 25.10 20.08 30.36 21.79 14.62 Watch It 18.37 32.27 12.63 27.55 25.87 14.37 15.61 26.46 24.24 16.66 20.85 (a) At 99% confidence, what is the margin of error in dollars? (Round your answer to the nearest cent.) $ (b) Develop a 99% confidence interval estimate of the mean amount spent for lunch in dollars. (Round your answers to the nearest…

Water Temperature If the variance of the water temperature in a lake is 28°, how many days should the researcher select to measure the temperature to estimate the true mean within 3° with 90% confidence? Round the intermediate calculations to two decimal places and round up your final answer to the next whole number. The researcher needs a sample of at least days.