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Find out if a difference between two response sets is significant. I asked 98 boys what modalities they thought were attractive to girls. 35 said athletes; 25 said tough guys. The rest endorsed other modalities at lesser rates.
Forty percent of the readings are within 0.5 V of the true value. Estimate the standard deviation for the meter. What is the probability of an error of 0.75 V?
Calculate the P-value for the test of the hypothesis p1 - p2=0. Let p1 represent the population proportion of eligible students in Pennsylvania.
Given that a respondent is over age 50, what is the probability that he or she gets news primarily from newspapers?
A researcher is interested in estimating the noise levels in decibels at area urban hospitals. She wants to be 99% confident that her estimate is correct.
2 cards drawn from a 52 but before the second card is drawn you put the first one back and reshuffle the deck. Are the outcomes on the two cards independent and why?
On average, 8% of the subscribers respond to the survey. Of the 8% who respond, an average of 53% say they will renew. Sample and Population.
Determine whether there is suffcient evidence to support the clain that the new balls have bounce heights with a mean different from 92.84 in. Does it appear that the new baseballs are different?
An article contained the following observations on degree of polymerization for paper specimens for which viscosity times concentration fell in a certain middle range.
What percentage of the workers is paying between $1800 and $2400 per year toward the family health coverage premium? What is the probability that a worker pays more than $2500 towards the family health coverage premium?
Using the .05 level, what should the experimenter conclude? (a) Use the steps of hypothesis testing, (b) sketch the distributions involved.
Alice and Bob agree to meet at the bus stop between 12 noon and 1pm. They each arrive at a random time in that interval and wait for 5 minutes before leaving, unless they see the other person. What is the probability that they meet each other?
Suppose we have the following information from a single regression: What is the coefficient of determination? What is the correlation coefficient?
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