Expected number of spots showing
Suppose that the number of dice thrown is a binomial random variable with n = 10 and p = 0.98. What is the expected number of spots showing on the thrown dice? Expected number of spots =
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He also recorded speeds of a random sample of 53 silver cars on a highway to find a mean of 69.02 mph and a variance of 8.84. Calculate the t-statistic for a test of the difference between the two sample means. (Report the value of t to 2 decimal
Find E(x) where X is the outcome when one rolls a six-sided balanced die.Find the mgf of X. Also, using the mgf of X, compute the variance of X.
A goodness-of-fit test is a nonparametric test involving a set of observed frequencies and a corresponding set of expected frequencies.
In an application to estimate the mean number of miles that employees commute to work roundtrip each day, the following information is given: n = 20; sample mean = 4.33; sample standard deviation of s = 3.50 miles.
The number of hours per day a college student spends on homework has a mean of 6 hours and a standard deviation of 1.25 hours. Yesterday she spent 3 hours on homework. How many standard deviations from the mean is that?
If we dispute that a baby is premature if the length of pregnancy is in the lowest 4%, find the length that separates premature babies from those who are not premature. Premature babies often require special care, and this result could be helpful
In the state of Florida, non-personalized automobile license plates use 7 characters. The first 4 charactersare letters (always upper case), followed by 3 numeric digits. Answer each question separately from theothers.
Determinet the mean and standard deviation of x. How will you interpret the values of the mean and standart deviation of x.
Use the fact that the standard normal distribution integrates to 1 to evaluate the following integral. I.e., use:
You decide to test the hypothesis by observing 20 cars with both a man and a woman in the front, and counting how many of those have a man driving.
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