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1.If the time it takes to finish a quiz follows a uniform distribution between 0 and 4 minutes, what is the probability that a quiz chosen at random took 3 or more minutes?
2.If you are told that the time to finish a quiz follows a uniform distribution between 0 and 4 minutes. What is the variance of the distribution?
3. Suppose you are told that the test scores in the class follow a normal distribution with mean 75 and standard deviation 7. What is the probability that if a test is chosen at random, that the score is greater than 85?
4.Suppose that you are told that test scores follow a normal distribution with mean of 75 and standard deviation of 7. What is the probability that a test score chosen at random is greater than 68?
5.If you are told that a variable follows a normal distribution, which of the following is not a characteristic of the distribution?
Possible Options:
a.It's mean and standard deviation determine location and spread
b. It is left-skewed
c. It is bell-shaped
d. It is symmetric
e. None of the above.
Create a 99% confidence interval estimate of population mean amount of paint included in a 1 gallon can.
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Ohio Company provided the following information regarding its only product--ice skates.
Produce the scatter plot for x3 and y3. Do you think there are any outliers?Calculate the correlation coefficient (r) for all the data points What does the p-value in your SPSS output tell you?
Families USA, a monthly magazine that discusses issues related to health and health costs, surveyed 20 of its subscribers. It found that the annual health insurance premiums for a family with coverage through an employer averaged $10,979.
In a random sample of 120 households, what is the probability that greater than 20 households, but, less than 35 households receive a retirement income?
The accompanying two histograms represent the distribution of acceptance rates (percent accepted) among 25 business schools in 1995. The histograms use different class intervals, but are based on the same data. In each class interval, the left endpoi..
1.as part of a promotion for a new type of cracker free trial samples are offered to shoppers in a local supermarket.
the data from an independent-measures research study produce a sample mean difference of 6 points and an estimated
the mean commute time in the us seems to be increasing. the current mean is 25.1 minutes and suppose you know ? 12. if
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