1. An educational psychologist wants to see if students' ID GPA Hours
grade point averages are related to how many hours per
17 3.12 10.5
week they spend studying. To that end, the psychologist
24 4.00 18.0
takes a random sample of students at UWL and records
61 2.85 7.5
for each student in the sample the GPA and average
63 2.51 3.5
number of Hours per week spent studying (as reported
65 2.16 9.0
by the student). The data is displayed at right. Renam-
82 3.62
20.0
ing GPA as y and Hours as x, the five basic statistics
84 3.54 12.0
are T = 11.5, y = 3.11, SSxx = 202.0, SSyy = 2.57, and
SSxy = 18.5.
(a) Find the regression line, using GPA as the dependent variable, and Hours as the
independent variable.
(b) Find the correlation coefficient of GPA with Hours.
(c) Give a test statistic and P-value for a test of the claim that there is a relationship
between the two variables.
(d) What is the predicted GPA for a student who averages zero hours per week studying?

problem:

f(x) = - 2/3x + 5; f(5/2)

substitute 5/2 in for x:

f(5/2) = -2/3(5/2) + 5

simplify the right side:

f(5/2) = -5/3 + 5

f(5/2) = 10/3

f(5/2) = 10/3

i hope this !

region b will make the inequalities y < 2x + 1 and y > -x - 2 true ⇒ answer a

step-by-step explanation:

* lets study the graph and the inequality to solve the question

- the inequality y > -x - 2

∵ the form of the inequality is y > mx + c , m is the slope of the line

  and c is the y-intercept (the line intersect y-axis at point (0 , c)

∴ c = -2 that means the line intersect the y-axis at point (0 , -2)

∵ the sign of the inequality is >

∴ we shad the part over the line

  region a and b

- the inequality y < 2x + 1

∵ the form of the inequality is y > mx + c , m is the slope of the line

  and c is the y-intercept (the line intersect y-axis at point (0 , c)

∴ c = 1 that means the line intersect the y-axis at point (0 , 1)

∵ the sign of the inequality is <

∴ we shad the part under the line

  region b and c

∵ the common region between the two lines is region b

∴ region b will make the inequalities y < 2x + 1 and y > -x - 2 true

12.4, 12.387, 12.26, 12.252, 6.241, 6.2, 6.015, 6.009, 1.411, 1.2, 1.056, 1.007, 0.31,   0.13, 0.5, 0.04

step-by-step explanation:

ur welcome : )

answer: not good

step-by-step explanation: