Question

1. Test the claim that the mean GPA of night students is smaller
than the mean GPA of day students at the .05 significance
level.

The null and alternative hypothesis would be:

H0:μN≤μDH0:μN≤μD H0:pN≥pDH0:pN≥pD H0:pN=pDH0:pN=pD H0:pN≤pDH0:pN≤pD H0:μN≥μDH0:μN≥μD H0:μN=μDH0:μN=μD |

The test is:

right-tailed

two-tailed

left-tailed

The sample consisted of 30 night students, with a sample mean GPA
of 3.33 and a standard deviation of 0.03, and 40 day students, with
a sample mean GPA of 3.35 and a standard deviation of
0.04.

test statistic = | |

[three decimal accuracy] |

Answer #1

Thak You...|||

Test the claim that the mean GPA of night students is larger
than the mean GPA of day students at the 0.10 significance
level.
The null and alternative hypothesis would be:
H0:μN≤μD
H1:μN>μD
H0:μN≥μD
H1:μN<μD
H0:pN≤pD
H1:pN>pD
H0:μN=μD
H1:μN≠μD
H0:pN=pD
H1:pN≠pD
H0:pN≥pD
H1:pN<pD
The test is:
two-tailed
left-tailed
right-tailed
The sample consisted of 35 night students, with a sample mean GPA
of 2.74 and a standard deviation of 0.07, and 35 day students, with
a sample mean GPA of 2.73...

Test the claim that the mean GPA of night students is larger
than the mean GPA of day students at the .005 significance
level.
The null and alternative hypothesis would be:
H0:pN=pDH0:pN=pD
H1:pN<pDH1:pN<pD
H0:pN=pDH0:pN=pD
H1:pN>pDH1:pN>pD
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
The test is:
left-tailed
two-tailed
right-tailed
The sample consisted of 70 night students, with a sample mean GPA
of 2.58 and a standard deviation of 0.04, and 30 day students, with
a sample mean GPA of 2.53...

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 larger
than the mean GPA of day students at the 0.025 significance
level.
The null and alternative hypothesis is
H0:μN≤μD
H1:μN>μD
The test is right tailed
The sample consisted of 25 night students, with a sample mean
GPA of 2.11 and a standard deviation of 0.06, and 25 day students,
with a sample mean GPA of 2.1 and a standard deviation of
0.07.
The test statistic is:
The p-value...

A random sample of 15 night students was taken with a sample
mean GPA of 3.32 and a standard deviation of 0.04. A random sample
of 18 day students was taken with a sample mean GPA of 3.3 and a
standard deviation of 0.02. Test the claim that the mean GPA of
night students (μN) is different than the mean GPA of day students
(μD) at α= 0.01. Assume that the data come from normal populations
with unequal variances.
Round...

Test the claim that the mean GPA of night students is smaller
than 3 at the .05 significance level.
The null and alternative hypothesis would be:
H0:p=0.75
H1:p≠0.75
H0:μ=3
H1:μ>3
H0:p=0.75
H1:p>0.75
H0:μ=3
H1:μ<3
H0:p=0.75
H1:p<0.75
H0:μ=3
H1:μ≠3
The test is:
left-tailed
right-tailed
two-tailed
Based on a sample of 35 people, the sample mean GPA was 2.97 with a
standard deviation of 0.08
The test statistic is: (to 2 decimals)
The critical value is: (to 2 decimals)
Based on this we:
Fail...

Test the claim that the mean GPA of night students is smaller
than 3.1 at the 0.005 significance level. You believe the
population is normally distributed, but you do not know the
standard deviation.
The null and alternative hypothesis would be:
H0:μ≥3.1
H1:μ<3.1
H0:p≥0.775H0
H1:p<0.775H1
H0:p=0.775H0
H1:p≠0.775H1
H0:μ=3.1H0
H1:μ≠3.1H1
H0:μ≤3.1H0
H1:μ>3.1H1
H0:p≤0.775H0
H1:p>0.775H1
The test is:
left-tailed
right-tailed
two-tailed
Based on a sample of 20 people, the sample mean GPA was 3.06
with a standard deviation of 0.05
The test...

1) Test the claim that the mean GPA of night students is smaller
than 3.1 at the 0.02 significance level.
a. The null and alternative hypotheses would be:
H0:p=0.775
H1:p≠0.775
H0:p=0.775
H1:p<0.775
H0:μ=3.1
H1:μ≠3.1
H0:μ=3.1
H1:μ>3.1
H0:μ=3.1
H1:μ<3.1
H0:p=0.775
H1:p>0.775
b. The test is:
*left-tailed
*right-tailed
*two-tailed
2) Based on a sample of 31 people, the sample mean GPA was 3.08
with a standard deviation of 0.14
a. The p-value is: ______ (to 3 decimals)
b. The significance level is:...

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...

Test the claim that the mean GPA of night students is smaller
than 2.9 at the 0.025 significance level.
The null and alternative hypothesis would be: (MULTIPLE
CHOICE)
A.) H0:p=0.725H0:p=0.725
H1:p?0.725H1:p?0.725
B.) H0:p=0.725H0:p=0.725
H1:p<0.725H1:p<0.725
C.) H0:?=2.9H0:?=2.9
H1:?>2.9H1:?>2.9
D.) H0:?=2.9H0:?=2.9
H1:??2.9H1:??2.9
E.) H0:?=2.9H0:?=2.9
H1:?<2.9H1:?<2.9
F.) H0:p=0.725H0:p=0.725
H1:p>0.725H1:p>0.725
The test is: left tailed, right tailed or two tailed?
Based on a sample of 75 people, the sample mean GPA was 2.86
with a standard deviation of 0.07. The p-value is: ____ (to...

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