Reference no: EM131444601
Sleep for Med Students vs. Non Med Students
One-Tailed and Two-Tailed Tests
Consider the sleep habits of med students versus non med students. The study consists of the hours of sleep per day obtained by 25 med students and 30 non-med students. The summarized data is given in the table below. x-bar is the mean hours of sleep per day from each sample. The degrees of freedom is given to save calculation time if you are not using software.
|
Mean Sleep Per Night for Med Students vs. Non-Med Students
|
|
Type of Student
|
n
|
|
s2
|
s
|
|
Med Student (x1)
|
25
|
5.7
|
0.9
|
0.95
|
|
Non Med Student (x2)
|
30
|
6.3
|
1.9
|
1.38
|
|
Degrees of Freedom: df = 51
|
|
|
|
|
1) The Two-Tailed Test:
Test the claim that the mean number of hours of sleep for med and non med students is different. Use the 0.05 significance level.
a. What is the claim?
b. What are the null hypothesis and alternative hypotheses?
c. What test statistic did you obtain? Hint: this is a t-test. Make sure you show your work.
d. Would you reject or fail to reject the null hypothesis? Why? Make sure you are not using generic wording. Which specific hypothesis test are you rejecting or failing to reject?
e. Conclusion: Is there enough data to support the claim that the mean hours of sleep by med and non med students are different?
2) The Two-Tailed Test:
Test the claim that the mean number of hours of sleep for med and non med students is different. Use the 0.01 significance level.
a. What is the claim?
b. What are the null hypothesis and alternative hypotheses?
c. What test statistic did you obtain? Hint: this is a t-test. Make sure you show your work.
d. Would you reject or fail to reject the null hypothesis? Why? Make sure you are not using generic wording. Which specific hypothesis test are you rejecting or failing to reject?
e. Conclusion: Is there enough data to support the claim that the mean hours of sleep by med and non med students are different?
3) The One-Tailed Test:
Test the claim that, on average, med students get LESS sleep than non-med students. Use the 0.05 significance level.
a. What is the claim? Is this a left-tailed test, a right-tailed test, or a non-directional test?
b. What are the null hypothesis and alternative hypotheses?
c. What test statistic did you obtain? Hint: this is a t-test. Make sure you show your work.
d. Would you reject or fail to reject the null hypothesis? Why? Make sure you are not using generic wording. Which specific hypothesis test are you rejecting or failing to reject?
e. Conclusion: Is there enough data to support the claim that, on average, med students get less sleep than non-med students?
4) The One-Tailed Test:
Test the claim that, on average, med students get LESS sleep than non-med students. Use the 0.01 significance level.
a. What is the claim? Is this a left-tailed test, a right-tailed test, or a non-directional test?
b. What are the null hypothesis and alternative hypotheses?
c. What test statistic did you obtain? Hint: this is a t-test. Make sure you show your work.
d. Would you reject or fail to reject the null hypothesis? Why? Make sure you are not using generic wording. Which specific hypothesis test are you rejecting or failing to reject?
e. Conclusion: Is there enough data to support the claim that, on average, med students get less sleep than non-med students?
|
Nonconstant growth
: Carnes Cosmetics Co.'s stock price is $52.97, and it recently paid a $2.25 dividend. This dividend is expected to grow by 19% for the next 3 years, then grow forever at a constant rate, g; and rs = 14%. At what constant rate is the stock expected to ..
|
|
What does the market believe will be the stock price
: You are considering an investment in Justus Corporation's stock, which is expected to pay a dividend of $2.75 a share at the end of the year (D1 = $2.75) and has a beta of 0.9. The risk-free rate is 3.6%, and the market risk premium is 4.5%. Justus c..
|
|
Average loan debt for undergraduate students
: A college claims that the average loan debt for undergraduate students upon graduation is $30,000. You conduct a hypothesis test where you conclude the average loan amount exceeds $30,000. which hypothesis test decision error could you have made, ..
|
|
Good investment for the mutual fund
: Suppose you are an analyst in a mutual fund and you have been following Apple for several years. The mutual fund has invested heavily in Apple. You have just been asked by the mutual fund manager to write a report on Apple with analysis and more impo..
|
|
Sleep for med students vs non med students
: Consider the sleep habits of med students versus non med students. The study consists of the hours of sleep per day obtained by 25 med students and 30 non-med students. The summarized data is given in the table below. x-bar is the mean hours of sl..
|
|
What was the firms cash flow from assets
: The December 31, 2015, balance sheet of Schism, Inc., showed long-term debt of $1,460,000, $152,000 in the common stock account, and $2,770,000 in the additional paid-in surplus account. The December 31, 2016, balance sheet showed long-term debt of $..
|
|
Complete a root-cause analysis
: Identify your problem statement and complete a root-cause analysis. Identify which quality tools you used to identify and vet the problem. Explain the quantitative and qualitative tools you used and provide a summary of how you arrived at your pro..
|
|
Calculate descriptive statistics for the prices
: Visually present data for the unit price of the product from different brands. Calculate descriptive statistics for the prices of different brands. Comment on the location, shape and variability of those distributions
|
|
How to find the interquartile range of the score
: The score is approximately normally distributed with a mean of 270, and population standard deviation of 9, how to find the score at the 25th, 75th percentile? and how to find the interquartile range of the score?
|