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a) Explain the difference between a type I and type II error, and, why failing to reject a null hypothesis is NOT the same as accepting the null hypothesis.
b) What is the relationship between a test statistic and a p-value as they relate to an alpha level?
If many samples of size 1000 persons are chosen, determine the expected value (mean X-bar) or average of average IQ's for these samples?
Twenty defective products are found after a long working day. What is the probability that all the defective products can be reworked?
What is the probability that a random sample of 75 students will provide a sample mean SAT score within 10 of the population mean?
Horizon Wireless, a cellular telephone company, is expanding into a new era. Relay towers are necessary to provide wireless telephone coverage to the different areas of the city.
A newspaper finds that the mean number of typographical errors per page is five. Find the probability that:
the fill volume of an automated filling machine used for filling cans of carbonated beverage is normally distributed
Assume that the significance level is a= 0.1. Use the given information to find the p-value and the critical value (s). With H1: p = with line through it 1/2 the test statistic is z= - 1.35
What is the probability that exactly six application forms have been falsified? Would you expect this probability to be small or large? Explain.
Finally, the when large plant is built and the demand happens to be high, the net present value of the profits $800,000. Draw a decision tree.
Critically discuss the general characteristics of a research study for which an independent-measures t would be the appropriate test statistics
Suppose it costs $2,500 to buy a defibrillator. Find the expected value of owning a defibrillator if there is a 4% probability that "Silver's Gym" will lose a lawsuit regarding its operation, with each lawsuit resulting in "Silver's Gym" being lia..
a metropolitan school system consists of three school districts-norths south central. the north district contains 25 of
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