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In a random sample of males 23 write with their left hand and 217 do not. 65 females write with their left hand and 455 do not. 0.01 significance level to test the claim that he rate of left-handedness among males is less than that among females.
a. Test the claim using a hypothesis test (show all work)
b. Test the claim by constructing an appropriate confidence interval (show all work)
c. Is the rate of left-handedness among males less than the rate of left-handedness among females? (show all work)
A ten year old survey found that the average income of sole proprietor CPA's was $74,914. To update this information, a new survey of 112 proprietor CPA's was taken and it showed a mean of $74,695.
According to the retail electronics chain, adults in 40 to 50 year old age group, the mean amount spent per year on electronics is $1998.
consider the continuous triangular distribution yx4.5 where 0ltxlt3. a what is the probability of 0ltxlt3? b what is
Findout the variance also standard deviation for the 2 distributions above. Evalute the variation of the data sets.
True mean number of years to retirement of its employees to within one month of the true mean and with 90% confidence if the range of the data is 7 years?
One normal curve has mean 23 and standard deviation 1, a second normal curve has mean 5 and standard deviation 10. The curve that is more dispersed, or spread out, is
The opportunity to apply ethical theories to the complex issue of ageism
In a distribution of scores, the arithmetic mean is 51, the median is 55, and the mode is 62. What is the score, in percentile form, of a subject who does less well than two-thirds of the sample?
In a high school graduating class of 100 students, 42 studied math, 68 studied psychology, 54 studied history, 22 studied both math and psychology, 7 studied history and neither math nor pyschology, 10 studied all three and 8 did not take any of t..
The standard deviation of test scores on a certain achievement test is 10.5. A random sample of 150 scores on this test had a mean of 72.8.
What is the probability that none of the three parents condones spanking as a regular form of punishment for their children? Give the mean and standard deviation of x. Interpret the results.
For the 20 test scores shown, find the percentile rank for a score of 86.
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