Tela earns a base salary of $2200 per month. Once she reaches $41000 in total sales, she earns an additional 5% commission (salary) on the amount of sales over $41000. Let s be the amount of her total sales for the month and N(s) be the amount of her salary for the month. (For instance, if she had sales of $42000 for the month, she would earn a salary of $2200 plus 5% of $1000, since $42000 is $1000 more than $41000.)

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.