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Time spent using email per session is normally distributed with μ = 8 minutes and σ = 2 minutes.
a) What is the probability that the sample mean is between 7.8 and 8.2 minutes?
b) What is the probability that the sample mean is between 7.5 and 8 minutes?
c) If you select a random sample of 100 sessions, what is the probability that the sample mean is between 7.8 and 8.2 minutes?
An experiment involves rolling a fair six-sided die repeatedly. How many times must the die be rolled for a {6} to result at least once with probability greater than or equal to 0.6 ?
MATH1550H: Assignment:Questions: (Genetics) What is the probability that at most two of the offspring are aa?
Formulate the hypotheses that can be used to test the validity of the brokerage firm executive's claim.
Compute the indicated confidence interval for the differenciate in proportions. Suppose that the samples are independent and that they have been randomly selected.
Organize data into a frequency distribution. How many classes would you propose? What value would you propose for class interval?
Median can be a more suitable measure of central tendency than mean if distribution of data is extremely skewed.
Suppose that the two lists are combined to produce a new list of 18 values. What is the average (mean) of this new list?
If 16 out of 20 spins just came up black, determine the probability that next spin is going to be red?
Did you find any outliers on the dependent variables that were due to errors of coding? If so, what and why? How would you correct an error of coding?
Determine the probability that the project will be completed in 80 days or less.
Ten students were sampled at random from a student population. Each was asked how many courses he or she was planning on studying in the upcoming year. The following is a list of the reported data values: 1, 2, 2, 3, 4, 5, 5, 5, 5, 6 What is the vari..
Assume we interested in relationship between the age of individual, as measured by visits. Suppose after selecting 15 members the observation:
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