JU12. IViödule 5 QuiZ Actual 9 Forecast8 2 Based on the conidence interval, can

Question

JU12. IViödule 5 QuiZ Actual 9 Forecast8 2 Based on the conidence interval, can the claim that the differences have a mean of 0 be rejected? A. No, because he confdence interval does not incude zero O D. Yes, because the cenfidence Interval does not include z 0A. No.becsne l appears ulkely that the deerences have amean equal to zero B. Yes, because it appears lkely that the diflerences have a mean equal to zer ° C. Yes, because appears "n kely that the 0 D. No, because appears ikely hat the dnerences have a mean opal to zero have a mean equal to zer 8

Explanation / Answer

Ans:

n=5

df=5-1=4

critical t value=2.776

95% confidence interval

=-2.2+/-2.776*4.087/sqrt(5)

=-2.2+/-5.074

=(-7.274, 2.874)

As,CI includes 0,it means there is no difference in actual and forecast.

actual before difference,d 1 79 82 3 2 82 83 1 3 81 74 -7 4 82 78 -4 5 82 78 -4 mean d -2.2 std. Dev= 4.087

Related Questions

Navigate

• Browse (All)
• Browse J
• Subjects

---

---

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