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Payroll. A small warehouse employs a supervisor at $1200 a week, an inventory manager at $700 a week, six stock boys at $400 a week, and four drivers at $500 a week.
a) Find the mean and median wage.
b) How many employees earn more than the mean wage?
c) Which measure of center best describes a typical wage at this company, the mean or the median?
d) Which measure of spread would best describe the payroll, the range, the IQR, or the standard deviation? Why?
Find a simple regression model that predicts time to fulfill an order based on value of the order. Interpret the estimated model coefficients.
Explain the notion of hypothesis testing. What is the general process that one should follow in conducting a hypothesis test?
The manager wants to test whether the average commission is $439 per month. A random sample of 100 observations is available. What statistical test is best in this situation? Why?
Identify and interpret the p-value for the test, then construct and interpret the 90% confidence interval for the difference between the population proportions.
Use a statistical computer package to compute the randomization test's two-sided p-value for testing whether the treatment effect is zero for the data in Section 1.1.1 (file case0101). How does this compare to the results from the two-sample t -te..
a restaurant offers a special pizza with 5 toppings. if there are 12 toppings from which to choose how many different
motorola used the normal distribution to determine the probability of defects and the number of defects expected in a
The number of hours of delay per each additional vehicle. The percentage of the variation in number of hours of delay that is accounted for by this regression. The percentage of hours of delay that are explained by vehicles stuck in traffic.
a common mistake many statistics students make is saying we accept the null or prove the null instead of fail to
Given the following information about a hypothesis test of the difference between 2 means based on independent random samples, what is the correct rejection region at a significance level of .05?
an article in the american statistician m. l. r. ernst et al. scatterplots for unordered pairs 50 1996 pp. 260-265
Find the probability of getting at least 127 boys among 152 babies. Does the result suggest that the YSORT method is effective? Why or why not?
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