Problems in Statistics- Correlation and Regression

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Problems in Statistics – Correlation and Regression

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Answer 1
H0: ρ = 0 (1): There was no linear relation between weights and chest size of wild
bears.
H1: ρ ≠ 0 (2): There was significant linear correlation between weights and chest size
of wild bears.
r = 0.964
B. Critical r = ± 0.268
B.
A.
Answer 2
H0: ρ = 0 (1): There was no linear relation between weights of paper and glass
garbage.
H1: ρ ≠ 0 (2): There was a significant linear correlation weight of paper and glass
garbage.
r = 0.126
B. One critical value at r = 0.126
(1) =
(2) >
(3) Less than or equal to
(4) Is not

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Answer 3
a. D.
b. r = 0.816
C. There is sufficient evidence to support the claim of a linear correlation between the
two variables.
c. B.
Answer 4
a. A
b. r = 0.816
D.
c. D.
Answer 5
Correct Scatterplot D.
Linear correlation r = 0.770
H0: ρ = 0 (1): There was no linear relation between number of internet users and scientific
award winners.
H0: ρ > 0 (2): There was significantly positive linear relation between number of internet
users and scientific award winners.
The P-value = 0.073
(3) Greater than
(4) is not