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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A engineer is going to redesign an ejection seat for an airplane. The seat was designed for pilots weighing between 120 lb and 161 lb. The new population of pilots has normally distributed weights with a mean of 126 lb and a standard deviation of
Provide first the approximate conservative 95% margin of error and then use it to report the corresponding confidence interval estimate.
Using this sample, a 90 % confidence interval for the percentage of college students who smoke is found to be 17.79 % to 20.21 %. Based this interval, can we conclude that the claim that 17 % of all college students smoke is reasonable?
Determine the expected value of x. Determine the standard deviation of x.
Give an example of one pair of these variables for which it does not make sense to calculate a correlation coefficient. Explain. Give an example of one pair of these variables for which it does makes sense to calculate a correlation coefficient. Expl
From their 50 data points (Washington DC not in the study), the researchers calculated a correlation of 0.988. Based on this study, can we say that individuals who spend a lot on groceries also spend a lot at restaurants? What possible lurking var
The mean home price in Raleigh, North Carolina is 217,600. Assuming that the home prices are normally distributed with a standard deviation of 36,400. what is the probability that a randomly selected home in Raleigh has a price below 200,000? Belo
For adult females the mean of their white blood cell counts is equal to 8.00 the random sample of 40 adult females has white blodo cell counts witha mean of 7.15 adn a SD of 2.28. Find the value of the test statistic.
Compute the population standard deviation for this random variable and use your answer from the previous question in order to complete the following observation: Out of a population of 10000 customers, on average _____ customers make additional pu
What is the distribution of theta given these observations? What is the mean of the prior distribution? To 4 decimals, what is the mean of the posterior distribution? Why does the relationship between these two numbers make qualitative sense?
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