Question

In 2000, the average GPA for Rutgers College students was 3.15. A sample in 2002 showed that the average GPA for Rutgers College students was 3.46. An alternative hypothesis for GPA of Rutgers College students is:

The mean Rutgers College GPA is more than 3.15 and less than 3.46

The mean Rutgers College GPA is less than 3.46

The mean Rutgers College GPA has increased to more than 3.15

None of the above

Answer #1

**upvote** my answer.Thanks
in advance....!

9. (19) A random
sample of 64 UPW college students shows that the sample mean GPA is
2.82 with a standard deviation of 0.45.
(a) Construct a 90%
Confidence Interval for the mean GPA of all UPW students.
(b) If we want to be
95% confident, and we want to control the maximum error of
estimation to 0.1, how many more students should be added into the
given sample?
(c) Would you
conclude that the mean GPA in UPW is...

a sample of 100 1st generation college students, with an average
gpa of 3.20 and a standard deviation of .375. calculate and
interpret 90% CI

We now want to test the null hypothesis H0
H0:In college, the average GPA of men is equal to the average
GPA of women.
H1:In college, the average GPA of men is different from the
average GPA of women.
A sample of 10 men's GPA in college has sample mean 2.9, and a
sample of 10 women's GPA has sample mean 3.1. We also know the GPAs
of men and women have the same estimated standard deviation
0.2.
Calculate the...

A study was conducted at a local college to analyze the average
cumulative GPA of students who graduated last year. Hint: you will
need your textbook.
Pair up the letter of the phrase that best describes each of the
items below.
1. Population_____ 2. Statistic _____ 3. Parameter _____ 4.
Sample _____ 5. Variable _____ 6. Data _____
a) all students who attended the college last year
b) the cumulative GPA of one student who graduated from college
last year...

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...

Suppose the Dean of our college claims that, the average GPA
for all students in the college is at least 3.00, with standard
deviation 0.4. However, from a class with 25 students,
we find the class average GPA is 2.80. Can we reject the
dean’s claim at significance level 0.05? (We conduct a hypothesis
testing).
a). H0:
mu=3.00, Ha:
b). Calculate test statistic, here is
z-value.
c). Find pvalue.
d). Make your decision.

33. Use the following information for questions 31-34:
The average GPA for all college students in the United States as of
2006 was 3.11. We want to test to see if the GPA of
students at Texas A&M is higher than the national
average. Suppose we survey 47 randomly selected students
at Texas A&M and the average GPA is 3.27, with a standard
deviation of 0.54. Assuming all conditions are met,
conduct a hypothesis test at the 0.01 significance
level.
What is the...

The average grade point average (GPA) of undergraduate students
in New York is normally distributed with a population mean of 2.5
and a population standard deviation of 0.4
(III) Above what GPA will the top 7% of the students be (i.e.,
compute the 93rd percentile): GPA (IV) If a sample of 36 students
is taken, what is the probability that the sample mean GPA will be
between 2.5 and 2.75?

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 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...

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