Answer questions 10-13 using the following Instructions:

- DO NOT APPROXIMATE any of the values that you get unless you are instructedto do so

- Use the symbol

- Use the symbol>=to denote greater than or equal ( with no space between them)

- use the wordnot=to denote not equal ( with no space between them)

- 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

- Please stick to the special instructions provided inside each question (if any)

QUESTION 11 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). V 000 B I Q 5- Paragraph v Arial v 14px v P 0 WORDS POWERED BY TINY QUESTION 12 035 In order to estimate the average daily down time, a manufacturer randomly sampled 25 days of production records and found a mean of 51.75 minutes and standard deviation of 7.9 minutes. Construct a 90% confidence interval for the population mean, assuming the days of production follows the Normal distribution. a. Tabulated value = b. Upper limit (approximate to four decimal points) 0. Lower limit (approximate to four decimal points) QUESTION 13 0.25 po Interpret the confidence interval calculated in the previous question For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac). BIU S Paragraph V Arial V 14px V P 0 WORDS PQUESTION 10 1.25 pt In 2012, the mean monthly bill of cell phone users in a given city was 86.7 L.E. A sample of 35 cell phone bills from last year was found to average 92.3 L.E. with standard deviation of 14 LE. Do the sample results indicate that the average cell phone bill has increased from 2012 to last year? Use a=10%. a. H0: 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 H0 or write the letter b if you will not reject H0, your answer should be either a or b)