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The Smoky Bear Trucking Company claims that average weight of fully loaded moving van is no more than 12,000 lb. Highway patrol make decision to check this claim. Random sample of 30 Smoky Bear moving vans illustrates that average weight (X bar) is 12,150 lb. With the sample standard deviation (S) of 800 lb.
a. Define the null and alternate hypotheses for the statistical test to find out if there is evidence that average weight of Smoky Bear moving van is more than 12,000 lb.
b. Determine the critical value of t-statistic with a 5% level of significance.
c. Determine the t-test statistic from sample data.
d. Determine the p-value.
e. Define the conclusion reached by Highway Patrol
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Test whether there is difference in the proportion of viewers using Chi square test.
Furthermore, you could also perform a regression on the data so you have a model with which you can predict other people's IQs based on their mother's IQ.
All welders in a factory begin as apprentices. Every year the performance of each apprentice is reviewed. Past records indicate that after each review, 10% of the apprentices are promoted to professional welder
The majority of the data is basically distributed if there are enough subjects. For instance, if you collected test scores of only a few honor students, the data will most likely not be normally distributed because you would have a sample that did..
what statement should be made about the null and alternative hypothesis based on sample data and significance level?
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A regression equation was computed to be Y= = 35 + 6X. The value of the 35 indicates that:
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Based on a survey of over 10,000 households, the number of televisions in the home was recorded as given in the table below. Based on the data, find the expected number of televisions in a home.
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