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In december 2001 the department of veterans affairs announced that it would begin paying benfits to soldiers suffering from lou gehrigs disease who had served in the gulf war. this decision was based on analysis in which the lou gehrigs disease incidence rate( the proportion devolping the disease) for 700,000 soilders sent to the gulf between august 1990 and july 1991 was compared to the incidence rate for the 1.8 million other soilders who were not in the gulf during this time period. based on this data, explain why it is not appropriate to perform a formal inference procedure ( such as the two sample z test ) and yet it is still reasonable to conclude that the incidence rate is higher for gulf war veterans than for those who did not serve in the gulf war.
The random sample population is 500 people who shop for workout programs and equipment. The sample mean of those shopping is that they spend an average of $250.00 per purchase and perchance at least 2 to 3 items for working out and weight lost
Decide if the events A and B are mutually exclusive or not mutually exclusive. A card is drawn from standard deck of 52 playing cards.
If a sample of 800 homes sold in 2004 is obtained what is the probability that between 175 & 200 homes are going to be investment?
For a hypothesis test about a population proportion or mean, if the level of significance is less than the p-value, the null hypothesis is rejected.
If the packets are sold in multi-packs containing six packets, what is the distribution of the number of prizes in a randomly chosen multi-pack?
Using convolution, determine the pdf of a continuous random variable Z where Z = X + Y. Here, X has a uniform distribution on [0, 3] and Y is a constant of value 2. Assume that X and Y are independent.
If the population mean was $1047 in the previous year, does the evidence suggest that expenditure this year has significantly changed?
An insurance company sells $300 deductible annual automobile insurance policies to a certain category (age, driving records) for $1000.00 The insurance company has set four different accident types
Suppose you want to estimate the sample size for a multiple correlation analysis. There are five predictors in your study.
In 2001, an estimated 78% of executives believed that age bias was a serious problem. In a 2004, 82% of the executives surveyed considered age bias a serious problem.
The Stroop task is when color words are printed in the wrong color; for example, the word red might be printed in the color blue.
For a sample of engineers, the mean salary is $95,000 with a standard deviation of $30,000. The median value is $80,000. What is the relative shape of the distribution and coefficient of skewness?
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