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The following data represents the running time of films produced by 2 motion picture companies. Assume these are independent samples Company Time (in minutes) Company 1 102 86 98 109 92 Company 2 81 165 97 134 92 87 114 Test the null hypothesis that the average running time of the films produced by company 2 exceeds the average running time of films produced by company 1 by an amount of 10 minutes. Test against the null hypothesis of a one sided alternative that the difference is more than 10 minutes. Use a .1 level of significance (alpha).
The samples do indicate that university A's students are younger than university B's; but is the difference significant at the 1% level?
Conduct a study to examine the relationship between party affiliation and gender. You find the following:
A researcher is interested in the effect of an electrolytic sports drink on the endurance of adolescent boys. A group of 30 boys is selected and half are given a treadmill endurance test while consuming the sports drink and the other half take the..
An educational study utilizes a simple pre post design to assess the efficacy of a computer tutor for solving inequalities.
Decide whether experiment is binomial, Poisson or neither based on info given. Each week man plays game in which he has a 21% chance of winning.
Below is a normal plot of residuals from a regression. Does the plot indicate any problems with the assumption that the residuals are Normally distributed
A company has 25 cars of this model. What is the probability that the mean nitrogen oxide emissions of these cars is above the 0.3g/mi limit?
Give a mathematical expression for the probability density function of driving distance.
LPP using the graphical method. Solveout the following linear programming problem utilizing the corner point method.
At the .05 significance level, can we conclude that there is a difference in their mean times?
Do women and men have different opinions about affirmative action? Based on a sub sample of 2008 GSS, the output figure below shows respondent's sex (sex) and attitudes toward affirmative action (DISCAFF: Are whites hurt by affirmative action).
Using the following number of flirtations actions in the 4 hour period, test the "null hypothesis'
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