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In one survey, successful female entrepreneurs were asked to state their personal definition of success in terms of several categories from which they could select. Thirty-nine percent responded that happiness was their definition of success, 12% said that sales/profit was their definition, 18% responded that helping others was their definition, and 31% responded that achievements/challenge was their definition. Suppose you wanted to determine whether male entrepreneurs felt the same way and took a random sample of men, resulting in the following data. Use the chi-square goodness-of-fit test to determine whether the observed frequency distribution of data for men is the same as the distribution for women. Let α = .05.
Definition foHappiness 51Sales/profit 95Helping others 43Achievements/challenge 63
A researcher randomly assigns 12 participants to one of three weight-loss conditions (A-diet, B-exercise, C-medication). The researcher obtains the following data: What is the values of SStotal
To cross a single lane of moving traffic, we require at least a duration d. Successive car interarrival times are independently and identically distributed with probability density function fT (t).
a proposal has been presented to the government of newfoundland and labrador to build a new section of highway that
A person's body temperature is found to be 101.00 °F. Is the result unusual? Why or why not? What should you conclude? What body temperature is the 95th percentile?
The sample proportion who reported drinking alcohol frequently was 0.092. When this is the cutpoint for forming a classification table, sensitivity = 0.53 and specificity = 0.66. Explain what these mean.
the following data lists the average monthly snowfall for january in 15 cities around the us20 13 15 28 16 25 2 1435 42
When a production machine is properly calibrated, it requires an average of 25 seconds per unit produced, with a standard deviation of 3 seconds. For a simple random sample of n 5 36 units, the sample mean is found to be }x 5 26.2 seconds per unit..
1.in the 2004 presidential election early exit polls conducted at key precincts indicated a strong lead for john kerry.
20% of their income tax returns are audited. Of five randomly chosen individuals, what is the probability that none will have their returns audited?
The mean return for the random sample of 33 mutual funds is 14.93 percent with a standard deviation of 9.57. Test the null hypothesis: H0: mu = 15% at α = 0.05.
Can the formal hypothesis testing approach be used for non parametric tests? How are parametric and nonparametric statistics different?
let X have one of the following distributions: if the prior probabilities are P(H0)= P(HA) which outcomes favor H0? What prior probabilities correspond to the decision rules with a= 0.2 and a =0.5
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