The Nenana Ice Classic in Alaska is a contest in which participants guess the ex

Question

The Nenana Ice Classic in Alaska is a contest in which participants guess the exact day and hour when a tripod set up on the Tanana River will fall through the breaking ice. Those who guess correctly split a cash prize of $300,000. Both the year and the exact breakup date have been recorded since 1917. Scientists have used this data to try to prove that global warming is occurring (i.e., that the breakup date gets earlier (smaller) each year). Below are plotted the breakup dates (measured in days since Jan. 1st) against the years from 1917 to 1941.

What three assumptions (besides independence) are necessary for a regression? Select all that apply.

Linear relationship between x and y

Nonlinear relationship between x and y

Normally distributed y's for each x

Non-normally distributed y's for each x

Standard deviations of the y's are constant for each x

Standard deviations of the y's are not constant for each x

Fan shape in the residuals

135 130 125 120 115 y=-0.2663x +134.39 R' = 0.1075 110 17 27 32 37 Ye ar Coefficient Standard t-Value p-Value Regression Table Constant Year Error 134.386 4.782 28.103 0.0001 0.266 0.1601.6640.1097

Explanation / Answer

we have to give 3 assumptions from the above given options to find the regression

those assumptions will be

1)there must be some linear relation ship between the x and y

2)normal distribution y's for each x

3) standard deviation of the y's are constant for each x.

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

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