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A simple random sample of size n=200 drivers were asked if they drive a car manufactured in a certain country. Of the 200 drivers? surveyed, 115 responded that they did. Determine if more than half of all drivers drive a car made in this country at the α=0.05 level of significance. What is the p value
Explain how the degrees of freedom affect a Chi-Square Distribution.
Verify that the 0.95 confidence interval for the slope is (0.14, 0.17). Would you reject H0 :β1 = 0? Based on this confidence interval only, can you be reasonably certain that generally, as X increases, Y increases as well?
Be able to estimate s when all you have is a sample's variance/standard deviation.
Are these samples good representations of the general population?How do you know? What could you do to make them a more representative sample?
Compute the mean, standard deviation and Coefficient of variation of the following data and comment on the result - Calculate the Karl Pearsons coefficient of correlation
The Greenberg public hearing meeting turned stormy. Citizens from four suburbs were gathered at city hall to try to get the city's federal funds for their own suburbs. The government recently awarded $750,000 to the city for road improvements. The..
Although the packet claims a germination rate of 92%, only 171 or 200 test seeds sprout. Is this evidence that the seeds have lost viability during a year in storage?
Interpret the p-Value. What assumption do you need to make in (a) about the two populations in order to justify your use of the F test?
a. Is it possible for a variance to be negative? Explain. b. What is the smallest value a variance can be? Under what conditions does the variance equal this smallest value?
suppose n90000 n18000 s50a. compute the standard error of xbar using the finite population correction factor.b. repeat
an educator wants to determine whether early exposure to school will affect iq. he enlists the aid of the parents of 12
question consider the following record of sales for a product for the last 100 days. sales unitsnumber of days
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