Question
In: Statistics and Probability
A researcher is curious if age makes a difference in whether or not students make use...
A researcher is curious if age makes a difference in whether or not students make use of the gym at a university. He takes a random sample of 30 days and counts the number of upperclassmen (Group 1) and underclassmen (Group 2) that use the gym each day. The data are below. The population standard deviation for underclassmen is known to be 22.57 and the population standard deviation for upperclassmen is known to be 13.57. Upper Classmen average = 202.4, population SD = 13.57, n = 30 Under Classmen average = 191.3, population SD = 22.57, n = 30 Is there evidence to suggest that a difference exists in gym usage based on age? Construct a confidence interval for the data above to decide. Use α=0.10. Confidence Interval (round to 4 decimal places): < μ1 - μ2
Solutions
orchestra answered 1 year agoRelated Solutions
A researcher is curious if age makes a difference in whether or not students make use...
A researcher is curious if age makes a difference in whether or
not students make use of the gym at a university. He takes a random
sample of 30 days and counts the number of upperclassmen (Group 1)
and underclassmen (Group 2) that use the gym each day. The data are
below. The population standard deviation for underclassmen is known
to be 22.57 and the population standard deviation for upperclassmen
is known to be 13.57.
Upper Classmen average = 202.4,...
A researcher wants to determine whether there is a difference in the average age of elementary...
A researcher wants to determine whether there is a difference in
the average age of elementary school, high school, and community
college teachers. Teachers are randomly selected. Their ages are
recorded below. Can you reject the claim that there is no
difference in the average age of each group? Use 5% level of
significance.
Elementary Teachers
High School Teachers
CC Teachers
24
37
45
28
42
36
25
39
39
52
48
61
36
43
35
22
32
45
a)...
2. A researcher wishes to determine whether there is a difference in the average age of...
2. A researcher wishes to determine whether there is a
difference in the average age of elementary school, high school,
and community college teachers. Teachers are randomly selected from
each group. Their ages are recorded below. Test the claim that at
least one mean is different from the others. Use α = 0.01.
Resource: The One-Way ANOVA
Identify the null hypothesis, Ho, and the alternative
hypothesis, Ha.
Determine whether the hypothesis test is left-tailed,
right-tailed, or two-tailed.
Find the critical...
A researcher was curious about whether people’s attitudes are related to their behaviors. As a simple...
A researcher was curious about whether people’s attitudes are
related to their behaviors. As a simple experiment, the researcher
measured people’s attitudes and behaviors regarding housework.
On the attitude side, the researcher measured the level of
agreement on the statement “It is much better for everyone
involved in housework: strongly agree, agree, disagree, and
strongly disagree” On the behavioral side, the respondents are
asked to estimate how many hours of housework they do per week.
Based on your analysis of...
A professor was curious as to whether the students in a very large class she was...
A professor was curious as to whether the students in a very
large class she was teaching, who turned in their tests first,
scored differently from the class mean on the test. The μ on the
test was 75 with σ = 10; the scores were approximately normally
distributed. The mean score for the first 20 tests was 78. Did the
students turning in their tests first score significantly different
from the larger mean at the .05 level?
a) Use...
A nursing professor was curious as to whether the students in a very large class she...
A nursing professor was curious as to whether the students in a
very large class
she was teaching who turned in their tests first scored
differently from the overall
mean on the test. The overall mean score on the test was 75 with
a standard
deviation of 10; the scores were approximately normally
distributed. The mean
score for the first 20 tests was 78. Did the students turning in
their tests first score
significantly
different from the mean?
3. A nursing professor was curious as to whether the students in a very large class...
3. A nursing professor was curious as to whether the students in
a very large class she was teaching who turned in their tests first
scored differently from the overall mean on the test. The overall
mean score on the test was 75 with a standard deviation of 10; the
scores were approximately normally distributed. The mean score for
the first 20 tests was 78. Did the students turning in their tests
first score significantly different from the mean? Explain....
A researcher wants to assess if there is a difference in the average age of onset...
A researcher wants to assess if there is a difference in
the average age of onset of a certain disease for men and women who
get the disease. Let = average age of onset for women and = average
age of onset for men. A random sample of n1 = 30 women with the
disease showed an average age of onset of = 83 years, with a sample
standard deviation of s1 = 11.5 years. A random sample of n2...
A researcher wanted to know if there is an age difference in the amount of time...
A researcher wanted to know if there is an age difference in the
amount of time spent on social media. They collected data from 8
teenagers (13-18 years old) and 8 young adults (21-26 years old);
they measured the average number of hours spent using all social
media platforms over the course of a day. The mean hours spent on
social media for teenage participants was 2.9750 with a variance of
1.0630 and the mean hours spent on social media...
A) Suppose that a medical researcher wants to explore whether there is an effect of age...
A)
Suppose that a medical researcher wants to explore whether there
is an effect of age in systolic blood pressure for males between 40
to 60 years old. To investigate the relationship, a random sample
of 100 males between 40 to 60 years old were selected and their
systolic blood pressure was recorded.
Identify each of the following for this experiment.
Subjects: Individuals between 40 to 60 years old Or Males
between 40 to 60 years old Or Systolic blood...
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