Description
Math 136
T-Lab:
Sleep in hours:
Females: 8 6
7.5 8
6.5 7.5
7 5 7
Males: 7
6
6.5
6
Inference about Two Means
6.5
7
9
Name ____________________________
6.5 8 6 5 7 9.5
8 9 7 7 7 6
8.5
5
5
8
5.5
1. Using data from a former class, give a 95% confidence interval for the difference of the population means
for the amount of sleep of male and female college students. Check your conditions and include boxplots.
Include the sample statistics(sample sizes, means, standard deviations), degrees of freedom, T?/2
,SE(standard error), E(Margin of Error) and summary sentence.
Conditions
Sample statistics
SE
E
df
CI
T?/2
Sentence
2. Do a hypothesis test and test the claim that there is a significant difference between the amounts of sleep
between male and female college students. State the hypotheses, compute the test statistics, standardize,
make a sketch, compute the p-value, state your conclusions followed by a summary statement.
Conditions(checked in problem 1)
Sketch(p-value)
Hypotheses
P-value
Test statistics(Computed in problem 1)
Conclusion(about Ho)
Standardize: t
Sentence
df
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