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Assume a logisitc regression model includes a continuous variable like age and a categorical variable like gender and an interaction term for these. If the P value for any of the main effects helpful in determining whether (a) the interaction is significant, (b) whether the main effect should be included in the model? (c) Would your answers to (a) or (b) change if the categorical variable were RACE with three categories?
In a sample of 100 M&M's, it is found that 8% are brown. Use a 0.05 significance level to test the claim that of the Mars candy company that the percentage of brown M&M's is equal to 13%. Identify the null and alternative hypotheses. Find the tes..
If 25 loads are chosen at random for a weight check, find the probability that the mean weight of those loads is less than 44.24 tons. Assume that the variable is normally distributed.
Your company has experienced problems with employee morale and productivity. The consultant that was hired submits a report that includes opinions and data collected from 300 secretaries and clerks as well as 75 senior managers.
Three cards are randomly selected from an ordinary deck of cards without replacement Compute the probability that the first card is a spade given that the second and third are spades.
How many treatments are there? What is the total sample size? Is there a significant difference at the 5% Level of significance? Would I accept or reject the null Hypothesis.
the random variable x represents the number of cars per household in a town of 1000 households. find the probability of
Level integer between 0 and 9, the compression level when writing. AllowNonCompressed logical. When reading, should non-compressed input be allowed?
30% of the college of business students major in finance. A random sample of 20 students is selected. What is the probability that no more than 3 students of the selected students are majoring in finance?
A certain type of injury has tangible costs of $40,000 per occurrence and intangible costs of $150,000 per occurrence. Perform a cost/benefit analysis to weigh the benefits of the proposed safety glasses policy against its expected costs.
Knowing that athletes tend to have a lower heartrate after exercising. Which students is in the best in shape
If zero can be the first digit and the numbers can be repeated, what is the probability Mr. Jones and Mrs. Smith select the same PIN? (Round your answer to 3 decimal places.)
A random sample of size 15 taken from a normally distributed population revealed a sample mean of 75 and a sample variance of 25. The upper limit of a 95% confidence interval for the population mean would equal?
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