The telephone company was interested in measuring the average daily usage in minutes for household telephones...
A school administrator claimed that the average time spent on a school bus by those students in his school district who rode school buses was 35 minutes. A random sample of 20 students who did ride the school buses yielded an average of 42 minutes riding time with a standard deviation of 6.2 minutes. Does this sample of size 20 contain sufficient evidence to indicate that the mean riding time is greater than 35 minutes at the 5% level of...
all of these pls D) In repeated sampling, 95% of the sample means will fall within the interval created. 4) A retired statistician was interested in determising the average cost of a $200,000.00 term lle insurance policy for a 60-year-old male non-smoker. He randomly sampled 63 subjects (60-year-old male non-smokers) and constructed the following 95 percent c mean cost of the term life insurance: ($850.00, $1050.00) State the appeopriate confidence interval for the interpretation for this term life insurance cost...
photos for each question are all in a row (1 point) In the following questions, use the normal distribution to find a confidence interval for a difference in proportions pu - P2 given the relevant sample results. Give the best point estimate for p. - P2, the margin of error, and the confidence interval. Assume the results come from random samples. Give your answers to 4 decimal places. 300. Use 1. A 80% interval for pı - P2 given that...