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Question: A wheel having the numbers 1 through 20 equally spaced about its circumference, is spun, and the number that is on top when the wheel comes to rest is recorded. If o is an outcome, let X(o) = the number of factors in the prime factorization of o. For example, if 7 comes up, then X(7) = 1 because 7 is prime. But X(15) = 2 because 15 = 3(5), and X(12) = 3 because 12 = 2(2)(3). By convention, 1 is not prime and has no prime factors. Determine the probability distribution of X, and the mean and standard deviation of X.
Show draw a cause-and-effect diagram to organize the possible causes of delayed flight departures into the following maj categories.
there is concern about the percent of on-time flights. a recent survey of two major airlines yielded the following
Random from a large production had 8 defective discs. Determine a 98% confidence interval for the population proportion of the defective disc drives.
Suppose we select a sample of 16 cuts from various CDs sold by CRA CDs, Inc. What can we say about the shape of the distribution of the sample mean?
can the value of the mean median or mode of a set of scores ever be negative?
Suppose that you want to set up a statistical test to challenge the claim of 6.7 seconds. What would you use for the null hypothesis?
A nursing school wants to estimate the true mean annual income of its alumni. It randomly samples 120 of its alumni. The mean annual income was $58,700 with a standard deviation of $1,500.
Suppose n = 1000 persons are to be sampled from this population and the sample proportion of married persons (ρ-hat) is to be calculated. What is the mean of the sampling distribution of ρ-hat?
With reference to Exercise 30, use suitable statistical software to find the P-value that corresponds to the observed value of the test statistic. Use this P-value to rework the exercise.
An individual's credit score is a number calculated based on that person's credit history that helps a lender determine how much he/she should be loaned or what credit limit should be established for a credit card.
on average 9 babies are born per 24-hour day at a hospital in indianapolis.a what is the probability that at least one
the sample variance 1.8 hours. If μ= 3.0, then calculate the observed value for the t-statistic. Construct 90% confidence interval for the mean.
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