Chrome Take a Test Olga Gonzale Secure htt MAT 141-NR Summer 2018 est aspxtestld

Question

Chrome Take a Test Olga Gonzale Secure htt MAT 141-NR Summer 2018 est aspxtestld 18405520 oiga Gonzalez & 1 72718 347 PM Time Remaining: 00:50:01 Submit Quiz Quiz: Quiz #6 Chapter 8 and 9 11 of 18 (7 complese) This Quiz: 18 pts possible This Question: 1 pt The tollowing data represent the pH of rain for a random sample of 12 rain dares. A normal probablity plot supgests the data could come from a population that is normally distributed. A boxplot indicates there are no outiers. Complete parts a) through d) below 4.99 4.74 456 5.30 5.02 4.80 6.19 572 Cick the icon to view the table of critical t-values (a) Determine a point estimate for the population mean. Apont estimate for the population mean is (Round to two decimal places as needed.) p) construct and merpret a 90%confdence nend the mean pHoftanwater. Select the correct choice below ad filinthe answer boxes to enmiete your (Use ascending order Round to two decimal places as needed) OA. "repeated samples are taken, 95% of them wil have a sample pHofran water between-ard OB. There is a 95% probatiity that the true mean pH of tan water is between 11and11. OC. Theres95% condence that te populaion mean pH of tain water is between and E - te) construa and interpret agg%comfdence nerval for the mean pH offanwaler. Select the corectchoce below and f.inte answer boles to complete your (Use ascending onder Round to two decimal places as needed.) OA. Thereis99% confidence that the populaton mean pH of fan water is between? ardll. Cick to select your answerts)

Explanation / Answer

The statistical software output for this problem is:

One sample T confidence interval:
? : Mean of variable

95% confidence interval results:

99% confidence interval results:

Hence,

a) Point estimate = 4.99

b) Option C; 4.75; 5.23

c) Option A; 4.66; 5.33

d) Increases; Since the higher confidence required wider confidence interval.

Variable Sample Mean Std. Err. DF L. Limit U. Limit Data 4.9925 0.10833537 11 4.7540555 5.2309445

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

---

---

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