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Based on the simple random sample of one hundred the analyst estimates average hourly wage earned by workers in the city to be $30 and calculates margin of error to be $5. Can we conclude from this that most workers there earn between $25 and $35 per hour? Is this right interpretation for margin of error?
There are 5,000,000 Adults 25+ in Mtown. An advertiser buys a schedule on Channel 45: 20 spots in early news with an average A25+ quarter hour audience of 150,000, 25 spots in daytime with an average A25+ quarter hour audience of 200,000, and 10 s..
Finding Normal probabilities using standard normal table or Excel built in functions
In 1965, a newspaper carried a story about a high school student who reported getting 9207 heads and 8743 tails in 17,950 coin tosses. Is this a significant discrepancy from the null hypothesis H 0 = 1/2.
Assume a sample of 400 American adults were taken. Show the sampling distribution of the proportion of adults who balance their checkbook at least once a month.
Compare BSN students who have lecture to those who do not receive lecture on safety. Compare ASN students who have lecture to those who do not receive lecture on safety
Describe the five steps of hypothesis testing. Compare Type I and Type II errors and give specific examples for each. Which error should be minimized the most and first?
Based on the result, does there to be an overall perception of 1 minute that is reasonably accurate?
In other words, could you generate two sets of random numbers (of length, say, 50) and set out the calculations in detail to determine whether the random variables are independent using chi-squared.
Can researcher conclude that humidity has significant effect on eating behavior? Use two-tail test with α = .05. Calculate estimated Cohen's d and r2 to measure size of treatment effect.
What level of confidence is associated with an interval of .400513 to .515487 for the long run proportion of new product placements?
Researcher asked group of 30 students - 12 of them supported change, 13 of them didn't, and 5 had no opinion. This is not binomial model as?
A certain airplane has two alternators to provide electrical power. The probability that a given alternator will fail on a 1-hour flight is.02.
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