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The manufacturer of a small utility trailer is inter- ested in comparing the amount of fuel used in towing the trailer with that required to overcome the weight and wind resistance of a rooftop carrier. Over a standard test route at highway speeds, 8 trips with the trailer resulted in an average fuel consumption of 0.28 gallons, with a standard deviation of 0.03. Under similar conditions, 10 trips with the rooftop carrier led to an average consumption of 0.35 gallons, with a standard deviation of 0.05 gallons. Assuming normal populations with equal standard deviations, use the 0.01 level in examining whether pulling the trailer uses significantly less fuel than driving with the rooftop carrier.
using t test for significance of slope to determine whether the independent variable is a significant predictornbsp of
in an application to estimate the mean number of miles that employees commute to work roundtrip each day the following
when a pair of dice are thrown we are customarily interested in the total number of dots t. calculatea. its mean.b. its
A social scientist believes that university theology professors are more conservative in political orientation than their colleagues in psychology
At a 0.05 level of significance, does this data show that 2 year college students and private unversity students work an equivalent amount of time?
When testing two populations with small sample sizes, do both sample sizes have to be identical? Why or why not?
The standard deviation of 6. What is the probability that a class of 50 has an average midterm mark that is less than 75?
consider a random sample of size n from a poisson distribution xi poim.a find the crlb for the variances of
a study showed that 36 out of 120 students of usc watched the football game between usc and usf. which one can be a
Intersection of two mutually exclusive events: can be any value between 0 to 1, must always be equal to 1.
Surveys have been widely used by politicians around the world as a way of monitoring the opinions of the electorate. Six months ago, a survey was undertaken to determine the degree of support for national party leader.
the genes for eye color in a certain male fruit y are r w. the genes for eye color in the mating female fruit y are r
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