need help with question 5

A snack-food company claims that its bags of plain chips contain 250 g, but we believe there is less than the stated amount. We decide to perform a hypothesis test at the 5% significance level (a = .05). We open 10 bags and find the sample mean is x = 245. If o = 8: (a) Find the critical z, rounding to 3 decimal places: Za = (b) Find the test statistic, rounding to 3 decimal places: z = (c) What is the conclusion of our test? O Reject the null hypothesis. O Do not reject the null hypothesis