8.8.48 Question Help * A manufacturing firm claims that the batteres used in the

Question

8.8.48 Question Help * A manufacturing firm claims that the batteres used in ther electronic games wit last an average of 26 nours. To maintain thies average, 25 bateres are tested each month it the e of asa pe nnas a mean 'x.23 6 hours and a da dard deias nofe4bus, Assure the dive 0025 an"0025 the firm satsted with its car what o r d sion should the firm draw to battery lives to be appeoximately normal Clicktere to.vew pagc 1 of he lable of crtical yalucs.otthe disthstion. Since the computed 1-value 1- (Round to three decimal places as needed lbetween-bees-ard 602S·the nm snouid.dsatsled wth the clam

Explanation / Answer

Hypothesis:

Null hypothesis: mu = 26
Alternative hypothesis: mu not equal to 26

Test statistic:

n = 25 , mean = 23.6 , s = 4

t = ( mean - mu) / ( s/sqrt(n))
= (23.6 - 26)/ ( 4/sqrt(25))
= -3

Critical value is = +/- 2.064

Since the computed t value -3 is not between t = -2.064 and t = 2.064. The firm should not satisfied with the claim.

we reject the null hypothesis

Related Questions

Navigate

• Browse (All)
• Browse 8
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.