he piston diameter of a certain hand pump is 0.8 inch. The manager determines th

Question

he piston diameter of a certain hand pump is 0.8 inch. The manager determines that the diameters are normally distributed, with evdence for the What are the correct hypotheses for this test? The null hypothesis is (1) -(2) ___ The altemative hypothesis is H,: (4)5)(6) Calculate the value of the test statistic. a mean of 0.8 inch and a standard deviation of 0.006 inch. After recalibrating the production machine, the and determines that the standard deviation is 0.0045 inch. Is there significant manager to conclude that the standard de ation has decreased at the ? 0.1° level or (Round to three decimal places as needed.) Use technology to determine the P-value for the test statistic The P-value is (Round to three decimal places as needed.) what is the corect conclusion at the ?: 0.10 level of signicance? Since the P-value is (7)than the level of significance, 8) 9)sufficient evidence to conclude that the standard deviation has decreased at the 0.10 level of the null hypothesis. There significance. (6)00.006. 0.0045 (5)O

Explanation / Answer

The statistical software output for this problem is:

One sample variance summary hypothesis test:
?2 : Variance of population
H0 : ?2 = 0.000036
HA : ?2 < 0.000036

Hypothesis test results:

Hence,

Hypotheses:

H0 : ?2 = 0.006
HA : ?2 < 0.006

Test statistic = 12.938

P - value = 0.047

Less; Reject; is

Variance Sample Var. DF Chi-square Stat P-value ?2 0.00002025 23 12.9375 0.0467

Related Questions

Navigate

• Browse (All)
• Browse H
• Subjects

---

---

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