Question
In: Statistics and Probability
4. You want to test whether the quarter of birth affects grades at university. Assuming that...
4. You want to test whether the quarter of birth affects grades at university. Assuming that births are randomly distributed throughout the year (this might not be correct in real life) you collect data on a sample of 100 students and get the following: Quarter birth Q1 Q2 Q3 Q4 Average grade 65 62 63 58 N 25 27 28 20 Compute the appropriate test using a 5% significance level Hint: Don’t forget to reweight the test of each category by the number of observations, as each cell represents the mean Xi for m observations.
Solutions
orchestra answered 1 year agoRelated Solutions
You are a nursing researcher and you are interested in whether university grades are predictive of...
You are a nursing researcher and you are interested in whether
university grades are predictive of performance on the NCLEX exam.
You randomly select a sample of 25 nurses from the Ontario registry
and obtain each nurse’s score on the NCLEX examination. You also
have access to their final grade in university. The complete data
are shown in the table below. Use these data to answer the
questions below the table. Assume a 0.05 level of
significance.
Nurse
NCLEX Score...
Suppose we want to do our own test of whether the way students take notes affects...
Suppose we want to do our own test of whether the way students
take notes affects their memory for material (like the Mueller and
Oppenheimer study), but we have a three condition experiment, where
students are randomly assigned to: 1) a "b.y.o." room where
students bring in their backpacks and can use whatever device
(laptop/ipad, paper notebook, livescribe pen) and whatever style of
note-taking / note-taking sofware they think works best for them;
2) a "laptop" room where students can...
Suppose you want to determine whether the brand of laundry detergent used and the temperature affects...
Suppose you want to determine whether the brand of laundry
detergent used and the temperature affects the amount of dirt
removed from your laundry. To this end, you buy two different brand
of detergent ( Super and Best) and choose three different
temperature levels (cold, warm, and hot). Then you divide your
laundry randomly into 6r piles of equal size and assign each r=4
piles into the combination of (Super and Best) and (cold,warm, and
hot).
super
best
cold
4,5,6,5...
Suppose you want to determine whether the brand of laundry detergent used or the temperature affects...
Suppose you want to determine whether the brand of laundry
detergent used or the temperature affects the amount of dirt
removed from your laundry. To this end, you buy two different brand
of detergent (A and B) and choose three different temperature
levels (“cold”, “warm”, and “hot”). Then you divide your laundry
randomly into 12 piles of equal size and dirtiness and wash them in
a combination of detergent and water temperature. The results you
get are as follows,
Grams...
. Independent samples t-test: You want to test whether plants grow better when you talk...
. Independent samples t-test:
You want to test whether plants grow better when you
talk to them. You obtain two sets of philodendrons, talk to one set
and ignore the other (except to water them). After 6 months, you
measure their growth in inches. The data are below. Conduct an
independent samples t-test with alpha = .05 with a nondirectional
test to determine if there was a significant difference between the
two sets of plants.
Answer the following questions....
The Basic Steps to Calculating a Hypothesis Test You want to start by determining whether you...
The Basic Steps to Calculating a Hypothesis
Test
You want to start by determining whether you are interested in
working with a mean or a proportion. Then identify each of the
parts listed below.
In order to use the formulas for a hypothesis test we first
need to confirm that the sample size requirements for the central
limit theorem are satisfied. See the notes for more information. If
the sample size is not met acknowledge that you need to proceed...
The Basic Steps to Calculating a Hypothesis Test You want to start by determining whether you...
The Basic Steps to Calculating a Hypothesis
Test
You want to start by determining whether you are interested in
working with a mean or a proportion. Then identify each of the
parts listed below.
In order to use the formulas for a hypothesis test we first
need to confirm that the sample size requirements for the central
limit theorem are satisfied. See the notes for more information. If
the sample size is not met acknowledge that you need to proceed...
What statistical test is most appropriate if you want to examine whether there is a difference...
What statistical test is most appropriate if you want to
examine whether there is a difference in graduation rates
(percentages) between public and private high schools in your state
of residence? Assume the data meets the assumptions for a
parametric test.
You want to discover whether university makes students more or less politically engaged. You survey 60...
You want to discover whether university makes students more or
less politically engaged. You survey 60 students (32 freshmen and
28 seniors) and ask them whether or not they voted in the most
recent state election. The results are shown in the table
below.
did not vote
voted
Freshmen
16
16
Seniors
4
24
Calculate the appropriate statistical test of your hypothesis,
including test statistic, and degrees of freedom. State your
conclusion regarding the research question.
You want to test whether salaries have gone up compared to in the year 2000. The...
You want to test whether salaries have gone up compared to in
the year 2000. The 2000 census shows that the average annual salary
of all Americans in 2000 was $35,152. You take an SRS of 10
Americans, ask for their annual salary for this year, and get the
following results in thousands of dollars.
Annual Salary
45, 16, 24, 83, 103, 31, 69, 94, 72, 20
a) Determine the population(s) and parameter(s) being
discussed
b) Determine which tool will...
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