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Let X be a random variable which is distributed normal with mean 200, but you don't know the standard deviation. Do pairwise comparisons (greater than, equal to, less than or can't say) for the following four quantities: a. P(100<x<120) b. P(280<x<310) c. P(120<x<140) d. P(x>280)
Given this information, what is the probability that the mesh polo shirt came from box 1? (Round your answer to 3 decimal places.)
in order to monitor the ecological health of the florida everglades various measurements are recorded at different
Suppose the number of tickets written per day follows a Poisson dictribution with mean of 6.5 tickets per day. Interpret the value of the mean.
Why is it important to study ethics in statistics? Have you seen statistics misused? Without naming specific companies or people, can you provide examples?
Determine the probability that 5 or less questionnaires will be returned? Compute also probability that 7 or more questionnaires will be returned.
Estimate and interpret the p-value of the calculated test statistic.
What advantage does correlation have over a cross-tab?
Suppose a fair coin is tossed n times. The probability of obtaining head and tail are the same because this is a fair coin. The proportion of heads is defined as the number of heads appeared divided by n.
Last week Sarah had exams in Math and in Spanish. On the Math exam, the mean was u, = 30 with a = 5, and Sarah had a score of X - 45. On the Spanish exam, the mean was u, = 60 with 0 = 6 and Sarah had a score of X = 65. For which class must Sarah ..
The researcher expects a 12-point treatment effect and plans to use a two-tailed hypothesis test with a = 0.05.
A researcher claims that the average age of people who buy lottery tickets is 70. A sample of 30 is selected and their ages are recorded as shown below. The standard deviation is 16. At alpha = 0.05 is there enough evidence to reject the researche..
What can you conclude regarding the information? Who tends to order the most or least number of condiments?
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