Question

The student academic group on a college campus claims that freshman students study at least 2.5 hours per day, on average. One Introduction to Statistics class was skeptical. The class took a random sample of 30 freshman students and found a mean study time of 137 minutes with a standard deviation of 45 minutes. If α = 0.01 (or 99% confidence level), is the student academic group’s claim correct?

Answer #1

A student group claims that first year students at a university
must study 2.5 hours per night during the
school week. A skeptic suspect that they study less than that on
average. A class survey finds that the
average study time claimed by 269 students is 137 minutes. Regard
these students as a random sample
of all first-year students and suppose we know that study times
follow a Normal distribution with
standard deviation of 65 minutes. Is there evidence that...

6. A university student claims that on average, full-time
students study more than 30 hours per week. A statistics class
conducts a study to test the claim. The students randomly sample 15
students and find ?=32.4 hours and ?=4.2 hours.
a) State the null and alternative hypotheses.
b) Determine the outcome of the student’s test at the:
i) At the 5% significance level. (∝=0.05) ii) At the 1%
significance level. ∝=0.01

Hypothesis testing: A student group claims that first-year
students at a university must study 2.25 hours per night during the
school week. A skeptic suspects that they study less than that on
average. A class survey finds the study time claimed by 259
students is 147 minutes. Regard these students as a random sample
of all 1st year students and suppose what study times follow a
Normal Distribution with a population standard deviation 62
minutes. Test to see if the...

A college claims that commute times to
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12 minutes. Assume that student commute times at this
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At the 0.05 level of...

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Calculate the point estimate of the proportion of students on
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Calculate the 95% confidence interval for the proportion of
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The college board claims that 32% of community college students
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Calculate the test statistics associated with this
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A recent study by XYZ Research Agency of college students found
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A. .23
B. .32
C. .45
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A recent study by XYZ Research Agency of college students found
that 33% of students drink energy drinks. A sample of 35 students
found that 8 drink energy drinks. Assume...

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Enter your answers rounded to four decimal places.
(a). The pooled sample...

In a study of the effect of college student employment on
academic performance, the following summary statistics for GPA were
reported for a sample of students who worked and for a sample of
students who did not work. The samples were selected at random from
working and nonworking students at a university. (Use a statistical
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employed. Round your test statistic to two decimal places, your df
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