Hi Please help with the attached questions

#6

Cost of Braces The average cost forteeth straightening with metal braces is approximately $54-32. A nationwide franchise thinks that its cost is below that gure. A random sample of23 patients across the oountry had an average cost of $5198 with a standard deviation of $635. at o. = 0115, can it be concluded that the mean is less than $5432? assume that the population is approximater normally distributed. {a} State the hypotheses and identify the claim. H.:$El H1: $8 Tlris hypothesis test is a test. [b] Find the critical value(s]. Round the answerrs} to at least three decimal places. If there is more than one critical value, separate them with commas. Critical value(s}: [:l {c} Compute the test value. Always round I score values to at least three decimal place. r=El (d) Make the decision. the null hypothesis. {e} Summarize me results. There enough evidence to support the claim that the naunwide fanchise's mean cost for teeth stlaightening is less than $5432. ije on other Planets Forty-eight percent of people believe that there is life on other planets in the universe. A scientist does not agree with this nding. He surveyed 130 randomlyr selected individuals and found 52 believed that there is life on other planets. At a: 0-05, is there sufcient evidence to conclude that the percentage differs from 43%? Use the critical value method with tables. Do not round intennecliatJe steps. {a} State the hypotheses and identifyr the claim. H.0 H. = D This hypothesis test is a test. {b} Find the critical value{s}. Round the answer to two decimal places. If there is more than one critical value, separate them with commas. Critical value(s}: D {c} Compute the test 1Il'alue. Round the answer to at least two decimal places. z=El (d) Make the derision. me \"was. (e) Summarize the results. There is (Choose one} I" that the percerage of people who believe that there is life on other planets differs from 43%