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4 A courier company is interested in the length of time a certain set of traffic lights is on green. The lights have been set so that the longest possible time between green lights in any one direction is 2 minutes, and the shortest possible time is 15 seconds. An employee is instructed to observe the lights and record the length of time between consecutive green lights. (a) What is the variable of interest? (b) What is the sample space? (c) Can the classical approach to probability be used to determine P (less than 60 seconds between green lights)? Why or why not? (d) What about the relative frequency approach? If so, how? If not, why not?
Use Random Number Generation (RNG) in Analysis ToolPak of Excel to generate n = 5 observations from the Normal distribution N(20, 5). Construct the 95% confidence interval for μ.
Roll a balanced 8-sided dice and a balanced 6 sided die and add the spots on the up-faces. Call the sum X. What is the probability distribution of the random variable X.
A description of what information the effect size would tell you that the probability value would not, and your hypothetical results in a few sentences using correct APA format.
Standard deviation of 0.17 ounces, assuming the weight of cereal is normally distributed, determine the likelihood that a package will contain more than 12.2 ounces?
If Molly and Kathleen wishes to make a profit of $5,000 for summer, how many pupils do they require to enrol?
Mean and standard deviation are 584.6 and 34.28
An experimental surgical procedure is being studied as an alternative to the old method. Both methods are considered safe. Five surgeons perform the operation on two patients matched by age, sex, and other relevant factors
Their probabilities for success on a single play are p for A and q for B, and successive plays are independent. Determine the probability that A wins the contest given that A plays first.
Department store accepts three types of credit cards, MasterCard, Visa, and their own store card. Charges are normally distributed. A random sample of 18 credit card purchases included 6 MasterCard
You are reviewing a scientific study where the epidemiologists sampled 1000 people from Charleston, South Carolina and measured variation at two loci, A and B.
The cutoff (or cutoffs), and the score of the sample on this distribution. Then explain your answer to someone who has never had a course in statistics (but who is familiar with mean, standard deviation, and Z scores).
Illustrate what can we say about the probability distribution. Is it approximately normal, elucidate the mean and standard deviation.
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