Question

Test the claim that the mean GPA of night students is significantly different than 2.6 at the 0.01 significance level.

Based on a sample of 50 people, the sample mean GPA was 2.57
with a standard deviation of 0.04

The test statistic is: (to 2 decimals)

The p-value is: (to 2 decimals)

Based on this we:

Reject the null hypothesis

OR

Fail to reject the null hypothesis

(Choose one)

Answer #1

Test the claim that the mean GPA of night students is
significantly different than 2.9 at the 0.1 significance level.
Based on a sample of 20 people, the sample mean GPA was 2.87
with a standard deviation of 0.06
The test statistic is (to 3 decimals)
The positive critical value is (to 3
decimals)
Based on this we
fail to reject the null hypothesis
reject the null hypothesis

a. Test the claim that the mean GPA of night students is
significantly different than 3.2 at the 0.05 significance level.
The null and alternative hypothesis would be:
Null Hypothesis: mu = 3.2
Alternative Hypothesis: mu ≠ 3.2
The test is: two-tailed
Based on a sample of 40 people, the sample mean GPA was 3.18
with a standard deviation of 0.04
The test statistic is: _____(to 2 decimals)
The positive critical value is:______ (to 2 decimals)
b. Test the claim...

Test the claim that the mean GPA of night students is
significantly different than 2.3 at the 0.05 significance
level.
The null and alternative hypothesis would be:
H0:p=0.575
H1:p>0.575
H0:μ=2.3
H1:μ≠2.3
H0:p=0.575
H1:p≠0.575
H0:p=0.575
H1:p<0.575
H0:μ=2.3
H1:μ>2.3
H0:μ=2.3
H1:μ<2.3
The test is:
right-tailed
two-tailed
left-tailed
Based on a sample of 40 people, the sample mean GPA was 2.26 with a
standard deviation of 0.04
The test statistic is:______ (to 2 decimals)
The positive critical value is:________ (to 2 decimals)
Based...

Test the claim that the mean GPA of night students is larger
than 2.6 at the 0.10 significance level. The null and alternative
hypothesis would be: H 0 : μ = 2.6 H 1 : μ ≠ 2.6 H 0 : μ ≥ 2.6 H 1
: μ < 2.6 H 0 : p ≤ 0.65 H 1 : p > 0.65 H 0 : p = 0.65 H 1 :
p ≠ 0.65 H 0 : p ≥ 0.65...

Test the claim that the mean GPA of night students is
significantly different than the mean GPA of day students at the
0.2 significance level.
The null and alternative hypothesis would be:
H0:pN=pD
H1:pN<pD
H0:pN=pD
H1:pN≠pD
H0:pN=pD
H1:pN>pD
H0:μN=μD
H1:μN≠μD
H0:μN=μD
H1:μN<μD
H0:μN=μD
H1:μN>μD
The test is:
two-tailed
right-tailed
left-tailed
The sample consisted of 25 night students, with a sample mean GPA
of 2.01 and a standard deviation of 0.08, and 60 day students, with
a sample mean GPA of...

Test the claim that the mean GPA of night students is
significantly different than 3.3 at the 0.01 significance
level.
The null and alternative hypothesis would be:
H0:μ=3.3H0:μ=3.3
H1:μ≠3.3H1:μ≠3.3
H0:p=0.825H0:p=0.825
H1:p≠0.825H1:p≠0.825
H0:μ=3.3H0:μ=3.3
H1:μ<3.3H1:μ<3.3
H0:μ=3.3H0:μ=3.3
H1:μ>3.3H1:μ>3.3
H0:p=0.825H0:p=0.825
H1:p>0.825H1:p>0.825
H0:p=0.825H0:p=0.825
H1:p<0.825H1:p<0.825
The test is:
left-tailed
right-tailed
two-tailed
Based on a sample of 70 people, the sample mean GPA was 3.32 with a
standard deviation of 0.06
The test statistic is: (to 2 decimals)
The positive critical value is: (to 2 decimals)
Based on this...

Test the claim that the mean GPA of night students is
significantly different than 2.4 at the 0.2 significance level. The
null and alternative hypothesis would be: H 0 : p = 0.6 H 1 : p
> 0.6 H 0 : p = 0.6 H 1 : p < 0.6 H 0 : μ = 2.4 H 1 : μ <
2.4 H 0 : μ = 2.4 H 1 : μ ≠ 2.4 H 0 : μ =...

Test the claim that the mean GPA of night students is
significantly different than the mean GPA of day students at the
0.1 significance level.
The null and alternative hypothesis would be:
H0:μN=μDH0:μN=μD
H1:μN<μDH1:μN<μD
H0:μN=μDH0:μN=μD
H1:μN≠μDH1:μN≠μD
H0:pN=pDH0:pN=pD
H1:pN>pDH1:pN>pD
H0:μN=μDH0:μN=μD
H1:μN>μDH1:μN>μD
H0:pN=pDH0:pN=pD
H1:pN≠pDH1:pN≠pD
H0:pN=pDH0:pN=pD
H1:pN<pDH1:pN<pD
The test is:
left-tailed
two-tailed
right-tailed
The sample consisted of 65 night students, with a sample mean GPA
of 2.66 and a standard deviation of 0.06, and 40 day students, with
a sample mean GPA of...

Test the claim that the mean GPA of night students is
significantly different than 3.2 at the 0.01 significance
level.
The null and alternative hypothesis would be:
A) H0:μ=3.2H0:μ=3.2
H1:μ≠3.2H1:μ≠3.2
B) H0:μ=3.2H0:μ=3.2
H1:μ<3.2H1:μ<3.2
C) H0:p=0.8H0:p=0.8
H1:p≠0.8H1:p≠0.8
D) H0:μ=3.2H0:μ=3.2
H1:μ>3.2H1:μ>3.2
E) H0:p=0.8H0:p=0.8
H1:p>0.8H1:p>0.8
F) H0:p=0.8H0:p=0.8
H1:p<0.8H1:p<0.8
The test is:
A) right-tailed
B) two-tailed
C) left-tailed
Based on a sample of 25 people, the sample mean GPA was 3.15 with a
standard deviation of 0.03
The test statistic is:___ (to 2 decimals)...

Test the claim that the mean GPA of night students is smaller
than 2 at the 0.10 significance level.
The null and alternative hypothesis would be:
H0H0:?pσμsx̄p̂ ?=≠≥≤<> Select an answer20.04351.950.10
H1H1:?σsx̄μp̂p ?≠=<>≤≥ Select an
answer0.040.101.95352
The test is:
right-tailed
two-tailed
left-tailed
Based on a sample of 35 people, the sample mean GPA was 1.95 with a
standard deviation of 0.04
The p-value is: (to 4 decimals)
Based on this we:
Reject the null hypothesis
Fail to reject the null...

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