A shopper wanted to test whether there was a difference in the average waiting times at the check-out counter among 5 different supermarkets. She selected a random sample of 20 shoppers from each of the five supermarkets. i. What is the null hypothesis for this situation? OThe average waiting time to check out is 25 minutes for all five supermarkets OThe average waiting time for each of the 100 shoppers is different. ONone of these

the unemployment rate for 18- to 34-year-olds was reported to be 10.8% (the Cincinnati Enquirer, november 6, 2012). assume that this report was based on a random sample of four hundred 18- to 34-year-olds. a. a political campaign manager wants to know if the sample results can be used to conclude that the unemployment rate for 18- to 34-years-olds is significantly higher than the unemployment rate for all adults. according to the bureau of labor Statistics, the unemployment rate for all adults was 7.9%. develop a hypothesis test that can be used to see if the conclusion that the unemployment rate is higher for 18- to 34-year-olds can be supported.b. use the sample data collected for the 18- to 34-year-olds to compute the p-value for the hypothesis test in part (a). using a 5 .05, what is your conclusion?c. explain to the campaign manager what can be said about the observed level of significance for the hypothesis testing results using the p-value

26. A mail order company has conducted a survey to assess whether at least 95% of their customers are satisfied with their most recent order. The results show that of the 280 customers asked, 270 said they were satisfied, with the final 10 saying they were dissatisfied. They have asked you to A conduct a hypothesis test at the 5% level to assess whether there is sufficent evidence to show that more than 95% of their customers are satisfied. What should your null and alternative hypotheses be? Ho:u = 0.95 H1:µ > 0.95 Ho:µ > 0.95 H:µ = 0.95 Ho:u 0.95 = 0.95 H: µ + 0.95 Ho:µ + 0.95 H:µ = 0.95

May I know the correct option?