Question

A day November 11, 2019 at 2:00 PM Late exam will have 15 points acted No w Noon. Please show All Work for any partial credit. If necessary to your final write your wees and we e that all populations have a normal distribution. You will only receive credit for the originale Botocopy). For the questions involving hypothesis testing you follow each of the steps in the de Number each of the steps from page 394. You may e Muhematian. Maple or Excel unless otherwise specie and work if po necessary round your final news to sinificant digitales specified No exame will be accepted after Friday November sheet. Please label all you may use the last page for scratch for the original with your name printed on it for complete the guidelines for hypothesis testing in the textbook hypothesis 3 Q018 Hypothesis testing for Variance and Standard counts) 417-422 F Variance and Standard Deviation(Bank ac- A local bank says that the standard deviation for bank account balances is 2454.26. A random sampe Side 26 bank accounts reveals a standard deviation of 2422.76. Assume that the bank balances are normally distributed. Test the hypothesis that the standard deviation for bank accounts is less than 2454.20 at the 0.05 level of significance. Use the Traditional method and refer to the guidelines on page 379 and include the graph. Show the position of the critical values and the test statistic. You must number each of the 8 steps on page 379. 15 points (graph is 4 of the 15 points)

Answer 1

We are Per 2454-26 vs H: 62 under Ho, (n-1)5² - 1 12 · 2 in2 Statstistic 2422.762 = 22 x 44 54262 2454.262 = 1 21.439 2 4.63 (We take root critical values for 2=0.05 for sod). = 110.98 and n² = 1 - 3.314 W =136.78 0.975, 22 3. 314 0.025 22 = 6.665 from the tables) c aca 4.63 since to 48 (21.434 (36.78 we fail to reject to So we cannoret conclude that 6<2454-26 at the 57 significance level