A research study investigated differences between male and
female students. Based on the study results, we...
A research study investigated differences between male and
female students. Based on the study results, we can assume the
population mean and standard deviation for the GPA of male students
are µ = 3.5 and σ = 0.05. Suppose a random sample
of 100 male students is selected and the GPA for each student is
calculated. What is the probability that the random sample of 100
male students has a mean GPA greater than 3.42?
.0548
.4364
.9452
.5636
A random sample of 36 seventh grade students in Harvard are
given a test on a...
A random sample of 36 seventh grade students in Harvard are
given a test on a reading test. Below are their raw scores.
73, 77, 80, 80, 84, 86, 91, 93, 93, 93, 94, 97, 100, 100, 103,
103, 104, 105, 105, 106, 108, 110, 111, 117. 120, 120, 123, 124,
126, 128, 129, 129, 130, 130, 136
Sample mean = 105.97
Sample standard deviation = 17.18
Nationally 30% of the students score 110 points or higher on
this test....
A random sample of 240 American men revealed that 68 held a
bachelors or graduate degree,...
A random sample of 240 American men revealed that 68 held a
bachelors or graduate degree, while 43 of 151 selected american
women held a bachelors or graduate degree. At the 0.05 level of
significance, test the claim that the proportion of American men
who have a bachelors or graduate degree is not equal to the
proportion of american women who do.
Most musicians have different popularities among various age
groupings. In a random sample of 200 high...
Most musicians have different popularities among various age
groupings. In a random sample of 200 high school students, 163 said
they liked Beyoncé or her work. In a random sampling of 200 adults
aged 30 to 40, 128 of them said they liked Beyoncé or her work.
Write down the formula needed in order to create a 95%
confidence interval:
Construct a 95% confidence interval for the difference in the
proportion of students that like Beyonce or her work and...
A research study investigated differences between male and female
students. Based on the study results, we...
A research study investigated differences between male and female
students. Based on the study results, we can assume the population
mean and standard deviation for the GPA of male students are
µ = 3.5 and σ = 0.5. Suppose a random sample of
100 male students is selected and the GPA for each student is
calculated. Find the interval that contains 95.44 percent of the
sample means for male students.
[3.45, 3.55]
[2.50, 4.50]
[3.35, 3.65]
[3.40, 3.60]