Question

Twelve different video games showing drug use were observed. The duration times of drug use were​ recorded, with the times​ (seconds) listed below. Assume that these sample data are used with a 0.05 significance level in a test of the claim that the population mean is greater than 75 sec. If we want to construct a confidence interval to be used for testing that​ claim, what confidence level should be used for a confidence​ interval? If the confidence interval is found to be 3.8

secless than<muμless than<211.0

​sec, what should we conclude about the​ claim?

84

15

575

51

0

60

223

43

178

00

2

58

The confidence level should be

____ ​%.

​(Type an integer or a decimal. Do not​ round.)

Answer 1

TOPIC:Confidence interval and hypothesis testing.

dunation - fopulapon mean times Cim sesods Parap 2efine, samp le Aige 12. Nammaly Arsume the populatbon io distnibuted' To test 75 Euo sa Ho H, Y75. (claim: H Hene, = 0. 05. We know, coniden ce tevel (-3) (-0.0) 100 95 EAnd The contidence level should be 95 . Nouw, given the obtoined 95. condidence intenval in3.8 <M211.0 that

Since the con di denee intenval nult nybothesi zed the contains we tail to value 61 Va eject Ho, at 0.05 Conclusion- There is not sutiient e viden ce to suppont the claim porlation mean is 4hat the neaten 75 sec.; at than IAna =0.05,