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Historically, 40% of visitors to the online store of ABC Limited made a purchase. 35% of the visitors who made a purchase came to the online store through a web search engine. Also, 10% of visitors who did not make a purchase came to the online store through a web search engine. If a visitor comes to the online store through a web search engine, what is the probability that he or she will make a purchase? (Suggestion: To think through the problem, use a probability tree and "whether a visitor makes a purchase" as the first step to depict what is given. Use the Bayes Theorem to calculate the probability in question. You do not need to include the tree in your submission.).
the probability that a call-centre consultant receives 3 calls during any given hour is 0.1404 and the probability
Find a 95% confidence interval for the difference between the proportions of unacceptable assemblies from the two teams.
Use of obsolete helmets by bikers in the United Kingdom in 2016 is estimated at 40%, which means 40% of bikers use helmets that have become obsolete.
Half of those stockbrokers who do not drink coffee, eat a candy bar. What is the probability that a stockbroker who eats candy also drinks coffee?
Duration of stuttering (in seconds) was compared for patients who had already been classified as having mild or moderate speech disabilities.
A social psychologist interested in the dating habits of college undergraduates samples 10 students and determines the number of dates they have had in the last month.
In a recent study on gender differences in education, a sample of 7 boys had a mean score of 17 and a standard deviation of 4.1 on a Standardized Math Test.
For sale. In the real-estate ads described in Exercise, 64% of homes for sale have garages, 21% have swimming pools, and 17% have both features.
Determine the sample size needed in order to be 99% confident that the sample proportion of the current customer accounts is within .03 of the true proportion of all current accounts for this company.
a. Find the point estimate of the percentage of people who visit a theme park when they take a trip. b. Find a 95% confidence interval estimate
what role does sample size play in the accuracy of statistical inference? why is the method of selecting the sample
A computer company wants to test the efficiency of its new programmable calculator. This problem related to Basic Statistics and it discuss about nested model using ANOVA
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