1. Use the same variable you picked to construct the confidence interval 2. Writ
ID: 3174823 • Letter: 1
Question
1. Use the same variable you picked to construct the confidence interval
2. Write both hypothesis
3. Tell about the tail of the test, find the test statistic and p value (please show steps if possible, I don't understand it that well.)
4. Write the initial conclusion based on the p value approach… use alpha = .05
5. Write your final conclusion using a complete sentence in reference to the context of your problem
6. Discuss the error associated with your decision
Answer the questions with the given data:
var1 var2
Temperatures (F) Ice cream sales ($)
58 215
62 325
52 185
60 332
66 406
74 522
68 412
80 614
76 544
74 445
64 408
Explanation / Answer
here question is not clearly mentioned what do you want.
what I could understand that you want to know the effiect of temperature(x) on icecream sales(y).
(if you want more than this please revert back at earliest)
here we use simple multiple linare regression of line y=a+bx
using software the equation and other information may be retrieved is as
here we want to test the effect of x as its regression coefficient is 14.86379 which is positive.
here null hypothesis H0:b=0 and alternate hypothesis H1:b is not equal to zero.
we use t-test for test of significance of b and t=b/SE(b)=14.86/1.3=11.4,
the critical t(0.05,9)=1.99 is less than calculated t=11.4, so we fail to accept H0 and conclude that b is not zero and there is siginificant effict of temperature on sales.
Variable DF Parameter Standard t Value Pr > |t| Estimate Error Intercept 1 -591.0931 87.63845 -6.74 <.0001 x 1 14.86379 1.3036 11.4 <.0001Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.