Video A-Z Fowle Marketing Research, Inc., bases charges to a client on the assumption that telephone surveys can be completed in a mean time of 15 minutes or less. If a longer mean survey time is necessary, a premium rate is charged. Suppose a sample of 35 surveys produces the data in the Microsoft Excel Online file below. Use a known a = 4.1 minutes. Is the premium rate justified? X Open spreadsheet a. Formulate the null and alternative hypotheses for this application How less than or equal to 15 Hain greater than 15 me b. Compute the value of the test statistic (to 2 decimals), 2.89 c. What is the p-value (to 4 decimals)? d. Using a = .01, is a premium rate justified for this client? A No Check My Work Reset Problem File Home Insert Dr Page Layout Formulas Data Review View Help dining Comments Arial 10 *** y # General K19 6 G H 1 1 2 A Call Time (minutes) 20.3 13.7 16.2 D Hypothesis Test about a Population Mean: Sigma Known Case Formules 4 3 6 7 18.1 Sample Se Sample Man ANA ANA Hypothesized Mean Value Population Standard Deviation 15 0.01 10 11 12 13 14 15 16 Level of significance Standard Error Critical Value Test State) ONA ANA ANA 136 173 146 174 18.5 99 15.1 186 17 145 19.5 113 163 205 217 16 122 18.5 25 145 21.5 156 159 547 p-value (Lower pvalue (Upper Tall) pvalue (Two To SNIA NA NA ENIA Rood Nil Hypothesis? Data range AA wy 19 20 21 22 23 24 25 26 27 25 29 30 31 12 lyzer 10 167 116 16.0 Sbeeti CM MacBook