Frequency distribution instead of a regular frequency
Under what circumstances should you use a grouped frequency distribution instead of a regular frequency distribution?
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Suppose the probability distribution X= number of jobs held during the past year. Find the probability that a randomly selected student held two or few jobs during the past year.
When 325 college students are randomy selected and surveyed, its found that 117 own cars. Construct a 99% confidence interval estimate of the true proportion of all college students who own cars.
A random sample of discount prices gives the following prices: 221, 286, 290, 330, 310, 250, 270, 280, 299, 265, 291, 275, and 281. At one percent level of significance, can you conclude that the mean fare has increased?
If 10 employed women are selected at random, what is the probability that exactly 2 have never been married? Give answer with 4 decimals.
If we are testing for the difference between the means of 2 related populations with samples of n1 = 20 and n2 = 20, the number of degrees of freedom is equal to
In a statistical test, the probability of making Type I and Type II error were found to be 0.0234 and 0.6, respectively. What is the power of the test? Please give solution and illustration.
In a multiple regression mode, the value of the coefficient of multiple determination
What additional information is obtained from measurements on an interval scale compared to measurements on an ordinal scale?
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