SAT Income GPA 1651 47000 2.79 1581 34000 2.97 1790 90000 3.48 1626 60000 2.5 1754 113000 2.92 1754 71000 3.76 1706 105000 2.8 1765 59000 3.26 1786 50000 3.89 1686 27000 3.67 1790 107000 3.31 1707 109000 3.16 1804 81000 3.73 1712 62000 3.21 1607 72000 2.8 1738 63000 3.7 1790 55000 3.86 1796 64000 3.91 1547 47000 2.63 1692 89000 2.98 1711 42000 3.45 1689 70000 3.06 1740 118000 2.88 1940 113000 3.96 A researcher studies the relationship between SAT scores, the test-taker’s family income (Income), and his/her grade point average (GPA). Data are collected from 24 students. A portion of the data is shown in the accompanying Excel Estimate: SAT = β0+ β1Income + β2GPA At the 5% significance level, are income and GPA individually significant? Show the relevant steps of each test, using the critical value approach. At the 5% significance level, are income and GPA jointly significant? Show the relevant steps of the hypothesis test, using the critical value approach. Predict SAT if Income is $80,000 and GPA is 3.5. Use these values for the explanatory variables to construct the 95% prediction interval for the individual SAT score. Regression Analysis -> stats -> Please answer each part

Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

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SAT	Income	GPA
1651	47000	2.79
1581	34000	2.97
1790	90000	3.48
1626	60000	2.5
1754	113000	2.92
1754	71000	3.76
1706	105000	2.8
1765	59000	3.26
1786	50000	3.89
1686	27000	3.67
1790	107000	3.31
1707	109000	3.16
1804	81000	3.73
1712	62000	3.21
1607	72000	2.8
1738	63000	3.7
1790	55000	3.86
1796	64000	3.91
1547	47000	2.63
1692	89000	2.98
1711	42000	3.45
1689	70000	3.06
1740	118000	2.88
1940	113000	3.96

A researcher studies the relationship between SAT scores, the test-taker’s family income (Income), and his/her grade point average (GPA). Data are collected from 24 students. A portion of the data is shown in the accompanying Excel

Estimate: SAT = β₀+ β₁Income + β₂GPA
At the 5% significance level, are income and GPA individually significant? Show the relevant steps of each test, using the critical value approach.
At the 5% significance level, are income and GPA jointly significant? Show the relevant steps of the hypothesis test, using the critical value approach.
Predict SAT if Income is $80,000 and GPA is 3.5. Use these values for the explanatory variables to construct the 95% prediction interval for the individual SAT score.

Regression Analysis -> stats -> Please answer each part

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