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Refer to the Journal of the European Academy of Dermatology and Venereology study of the link between nickel allergies and use of mascara or eye shadow Exercise 6.58 (pg 326). Recall that two groups of women were sampled- one group with cosmetic dermatitis from using eye shadow and another group with cosmetic dermatitis from using mascara. In either group, how many women would need to be sampled in order to yield an estimate of the population percentage with a nickel allergy that falls no more than 3% from the true value? Study #1: 131 women with dermatitis and 12 diagnosed with nickel allergy Study #2: 250 women with dermatitis and 25 diagnosed with nickel allergy
An American put option to sell a swiss franc for dollars has a strike price of $0.80 and a time to maturity of one year. The volatility of the swiss franc is 10%
Based on the F distribution tables, what is the most accurate statement that can be made about the p-value for this test?
Its known that 5% of all AA bateries made by Power Manufactures are defective. AA batteries are sold in packs of 4. Find the probability that a pack of 4 has exaclty 2 defective batteries.
How large sample size must be taken to be 95% confident.
An independent-measures t test produced a t statistic with df=20. If the same data had been evaluated with an analysis of variance, what would be the df values for the F-ratio?
The liquid chlorine added to swimming pools to combat algae has a relatively short shelf life before it loses its effectiveness. Records indicate that the mean shelf life of a 5-gallon jug of chlorine is 2,10 hours (90 days).
From the following information for Alfred Industries compute the overhead spending variance and the volume variance:
99.7% of the final game scores fall within what range, what percent of all final game scores did the pistons have more than 106 points?
Assuming that these are a random sample of all publicly traded companies, construct a 95% confidence interval for the overall noncompliance proportion.
Consider the following data for two independent random samples taken from two normal populations. What is the 90% confidence interval estimate of the difference between the two population means?
Such tv are randomly selected and checked to determine what is being watch. Would it be unusual to find that 954 of the 2500 tvs are tuned to eyewitness news?
Student A and B took different statistics classes and 2 different finals. Student A had a score of 83 out of 100 and ranked 72 in his class. Student b scored 85 out of 100 and he ranked in the 70 percentile of his class.
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