You go to the movieplex where movies ordinarily cost $10. you are intending to see a movie for which you have a $3 off coupon good for only that movie at that time. however, when you get there you see a friend who asks if you would rather see a new release. both movies start and end at the same time. if you decide to see the new re-lease with your friend, what is your opportunity cost? the amount you value the first movie + $3 the amount you value the first movie + $10 $3 $10

According to a research study, parents with young children slept 6.4 hours each night last year, on average. a random sample of 18 parents with young children was surveyed and the mean amount of time per night each parent slept was 6.8. this data has a sample standard deviation of 0.9. (assume that the scores are normally distributed.) researchers conduct a one-mean hypothesis at the 5% significance level, to test if the mean amount of time parents with young children sleep per night is greater than the mean amount of time last year. the null and alternative hypotheses are h0: μ=6.4 and ha: μ> 6.4, which is a right-tailed test. the test statistic is determined to be t0=1.89 using the partial t-table below, determine the critical value(s). if there is only one critical value, leave the second answer box blank.