Slatisties eourse has found sömething interesting: there may be a relationship between scores on his first midterm and the Español number of years the test-takers have spent at the university. For the 64 students taking the course, the professor found that the least-squares regression equation relating the two variables number of years spent by the student at the university (denoted by x) and score on the first midterm (denoted by v) is y= 82.52-2.53x. The standard error of the slope of the least-squares regression line is approximately 1.55. Test for a significant linear relationship between the two variables by doing a hypothesis test regarding the population slope B,. (Assume that the varíable y follows a normal distribution for each value of x and that the other regression assumptions are satisfied.) Use the 0.05 level of significance, and perform a two- tailed test. Then complete the parts below. (If necessary, consult a list of formulas.) (a) State the null hypothesis H, and the alternative hypothesis H. B H :0 H, :0 OSO (b) Determine the type of test statistic to use. (Choose one) ▼ (c) Find the value of the test statistic. (Round to three or more decimal places.) 回 国回|

Algebra and Trigonometry (MindTap Course List)
4th Edition
ISBN:9781305071742
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter1: Equations And Graphs
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The proiessur of an introductory statistics course has found something interesting: there may be a relationship between scores on his first midterm and the
number of years the test-takers have spent at the university. For the 64 students taking the course, the professor found that the least-squares regression
Español
equation relating the two variables number of years spent by the student at the university (denoted by x) and score on the first midterm (denoted by y) is
y = 82.52- 2.53x. The standard error of the slope of the least-squares regression line is approximately 1.55.
%3D
Test for a significant linear relationship between the two variables by doing a hypothesis test regarding the population slope B,: (Assume that the variable y
follows a normal distribution for each value of x and that the other regression assumptions are satisfied.) Use the 0.05 level of significance, and perform a two-
tailed test. Then complete the parts below.
(If necessary, consult a list of formulas.)
Aa
(a) State the null hypothesis H and the alternative hypothesis H,.
H :0
H :0
D
(b) Determine the type of test statistic to use.
(Choose one) ▼
O<O
(c) Find the value of the test statistic. (Round to three or more decimal places.)
(d) Find the p-value. (Round to three or more decimal places.)
(e) Based on the data, can the professor conclude (using the 0.05 level) tha
there is a significant linear relationship between number of years spent at the
university and score on the first midterm?
Yes
No
Transcribed Image Text:The proiessur of an introductory statistics course has found something interesting: there may be a relationship between scores on his first midterm and the number of years the test-takers have spent at the university. For the 64 students taking the course, the professor found that the least-squares regression Español equation relating the two variables number of years spent by the student at the university (denoted by x) and score on the first midterm (denoted by y) is y = 82.52- 2.53x. The standard error of the slope of the least-squares regression line is approximately 1.55. %3D Test for a significant linear relationship between the two variables by doing a hypothesis test regarding the population slope B,: (Assume that the variable y follows a normal distribution for each value of x and that the other regression assumptions are satisfied.) Use the 0.05 level of significance, and perform a two- tailed test. Then complete the parts below. (If necessary, consult a list of formulas.) Aa (a) State the null hypothesis H and the alternative hypothesis H,. H :0 H :0 D (b) Determine the type of test statistic to use. (Choose one) ▼ O<O (c) Find the value of the test statistic. (Round to three or more decimal places.) (d) Find the p-value. (Round to three or more decimal places.) (e) Based on the data, can the professor conclude (using the 0.05 level) tha there is a significant linear relationship between number of years spent at the university and score on the first midterm? Yes No
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