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A regional director responsible for business development in the state of Pennsylvania is concerned about the number of small business failures. If the mean number of small business failures per month is 8.7, what is the probability that exactly four small businesses will fail during a given month (to 4 decimals)? Assume that the probability of a failure is the same for any two months and that the occurrence or nonoccurrence of a failure in any month is independent of failures in any other month.
Types of digital cameras are equal, is there evidence of a difference in the mean battery life between the two types of digital cameras at the 95% confidence level?
Sketch the distributions involved, and (c) explain your answer to someone who is familiar with the t test for a single sample but not with the t test for independent means.
Draw the appropriate conclusions with respect to female and male human resource manager salary levels. Calculate the t value for independent groups for the following data.
A real estate company wants to study the relationship between house sales prices and some important predictors of sales prices. Based on data from recently sold homes in the area, the variables
in a survey of undergraduate library usage it was found that 78 of seniors 65 of juniors 41 of sophomores and 21 of
Is it true that one of the major assumptions underlying ANOVA is that all the populations being studied in the experiment have the SAME distribution?
Demostate the use of appropriate tools for converting data into meaningful information and select, defend and use appropriate statistical tools for analysis of data and interpretation.
suppose that for he company produces independence day the company produces special bags containing 100 pieces of candy
compute the expected value and variance of U.Determine Expected value and variance using uniform distribution.
We want to know if his support has decreased. In computing a test of hypothesis with , what is the estimate of the overall proportion?
a psychological test used to measure the level of hostility is known to produce scores which are normally distributed
Identify the null hypothesis, alternative hypothesis, test statistic, p-value or critical value(s), conclusion about the null hypothesis, and final conclusion that addresses the original claim.
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