Question

music do, on average, 6. Register Balance: Here we investigate whether the register balance at a local retail store is better on days with a manager than days without a manager. This evidence might be used to determine whether or not you should always schedule a manager. The table gives the register balance for a sample of 10 days with a manager and 10 days without a manager. Here, 0 means the register balance is right on, negative means there is less money than there should be, and positive means there is more money than there should be. The degrees of freedom (d.f.) is given in the table. Register Balance (10 days each) mean With Manager (21) -5 0 -7 5 -3 - 2 -1 -7 -5 -2.90 13.21 3.63 Without Manager (29) 2 -9 -15-10-10 0 -12-5 0 -14 -7.30 38.01 6.17 degrees of freedom: d.f. = 15 s (a) Test the claim that the average register balance is better (greater) for all days with a manager than those days without a manager. Use a 0.01 significance level. (b) Test the same claim at the 0.05 significance level.

Answer 1

Ans: we have giren nis-2.90, 52²-7:30 bis 3-63, 6.17 mi? 10 ne a10. degree of freedom 15 Mo: Mic My Hq: 4,242 Conetailed! 80, since xur 2 128190-(-7.30) 3.632 6:17.2 + Te 822 ch t - to 1.9437 we it at 994. with is df = 2.6025 since A <2.6025, so do not reject Ho. do nat have evidence to accept the claimi that average register balance is better for all days with a manage than those days without manager it at 957. with is df = 1.7531 sinec it >1.7531, so Reject Ho. we have evidence accept the claim. a b)