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An a very hot summer day 5% of the production employees at midland states steel are absent from work. The production employees are to be selected at random fro a special in depth study on absenteeism. what is the probability of selecting 10 production employee at random on a hot summer day and finding that none of them are absent.
Suppose that this estimate was based on a random sample of 600 households (i.e., n = 600 and p = .64). Construct a 95% confidence interval for π, the true proportion of all households that use coupons.
Compute the value of t. What is your decision regarding the null hypothesis?
Imagine that these results are disseminated to the general public through publication and media coverage. Write about one possible harmful consequence that these conclusions could have in the "everyday" world.
Explain how the Central Limit Theorem can help you convince your boss that while you can't get rid of sampling error the results from your statistical work (that is based on sampling) can still be useful.
Determine the probability of having more than 3 defects in a roll?
The changing ecology of the swamps in Louisiana has been the subject of much environmental research. One water-quality parameter of concern is the total phosphorous level.
At the end of class, our teacher said "If you're perceptive, you may have noticed that a regression analysis produced by the Excel Data Analysis ToolPak contains an ANOVA table.
What is the minimal length of time the body should stay in the mold if the manufacturer wants to be 85% sure that the bonds have hardened?
Define the null hypothesis. If the null hypothesis is rejected then? Read the Z statistic from the normal distribution table:
A data source generates hexadecimal characters. Let X be the integer value corresponding to a hex character. Suppose that the four binary digits in the character are independent and each is equally likely to be 0 or 1.
The maximum allowable payback and discounted payback statistic for the project are 2 and 2.5 years, respectively. Use the NPV decision rule to evaluate this project; should it be accepted or rejected?
The number of degrees of freedom corresponding to between treatments is:
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