Please help me Answer questions 6-9, here are some Instructions (to help you answer the questions):

- Use the symbol

- Use the symbol>=to denote greater than or equal

- use the wordnot =to denote not equal

- Use the word "Mue" if you want to refer to the population mean

-Use the word "X bar" if you would like to refer to the sample mean

- Use the word "Pi" if you would like to refer to the population proportion

- Use the letter "p" if you would like to refer to the sample proportion

QUESTION 6 1. In study for the month printing cost, 25 printing unit has been chosen, where the average of the cost was 23.87 thousand pound and standard deviation 10.25 thousand pound. Test at 95% condence whether the mean of the printing cost in the population is at most 25 thousand pound. a. What assumption is needed to do this test? b. H0: c. H1: d. Calculated Statistic value (approximate to four decimal points) = e. Tabulated value(s) = 1. Decision: (write the letter a if you will reject Ho or write the letter b if you will not reject H0, your answer should be either a or b) QUESTION 7 0.25 points Save Answer Using the test in the previous question, what conclusion can be drawn about the question's claim QUESTION 8 1.25 p A study showed that 79% of companies offer employees flexible working hours. Suppose a researcher believes that in accounting firms this figure is lower. The researcher randomly selects 415 accounting firms and through interviews determines that 303 of these firms have flexible hours. Does the test show enough evidence to conclude that a significantly lower proportion of accounting firms offer employees flexible working hours? (use a = 0.01) a. HO: b. H1: c. Test Statistic value (approximate to four decimal points) = d. Critical value(s) = e. Decision: (write the letter a if you will reject Ho or write the letter b if you will not reject HO, your answer should be either a or b)QUESTION 9 0.25 points Save Answer Using the test in the previous question, what conclusion can be drawn about the question's claim For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac). \"I