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A researcher wishes to best test the claim that the average age of lifeguards in new york city is less than 25 years. She selects a sample of 36 guards. Find the mean sample to be 24.7 years. With a standard deviation of 3 years. Is there evidence to support the claim at C,V= -1.70 find the P value
The F test is used in Analysis of Variance (ANOVA). When would a researcher use an ANOVA? Explain (one paragraph in length).
Q. An owner of a chain of stores would like to predict weekly sales based on the number of customers who made a purchase. A random sample of 10 stores were selected. The weekly sales are in thousands of dollars.
recommendations regarding how long infants in developing countries should be breast-fed are controversial. if the
Discuss the advantages and disadvantages of using interview techniques and focus groups in qualitative research
64% of men consider themselves professional baseball fans. You randomly select 10 men and ask each if he considers himself a professional baseball fan.
If you play California Super Lotto, you pick five numbers from 1 to 47 and one mega number from 1 to 27. If you buy one ticket ($1.00), what is the probability of winning the Jackpot
Assume these data constitute a random sample of such funds, and use them to test the claim that the average world stock fund made more than 25% for its investors during this period.
what is the relationship between the confidence level and type i
Vote against a proposed pay increase. 320 would vote FOR while 1280 would vote against the proposal. Construct a 95.44% confidence interval for the proportion voting against the proposal.
1. Let X1, X2, X3, and X4 be independent, U (0, 1)-distributed random variables. Compute
At a board meeting of 20 businessmen, all of whom wear ties, what is the probability that:
As part of this trial, they want to find out whether there is a difference between effectiveness for women and for men. At = .05, what is the test value?
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