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Molly s college offers two sections of Statistics 101. From what she has heard about the two professors listed, Molly estimates that her chances of passing the course are 0.80 if she gets Professor Scedastic and 0.60 if she gets Professor Kurtosis. The registrar uses a lottery to randomly assign the 120 enrolled students based on the number of available seats in each class. There are 70 seats in Professor Scedastic s class and 50 in Professor Kurtosis s class.
a) What's the probability that Molly will pass Statistics?
b) At the end of the semester, we find out that Molly failed. What's the probability that she got Professor Kurtosis?
A real estate agent wants to determine if there is a relationship between the size of a home in square feet and the list price. She randomly selects 50 homes in her local market that are currently listed for sale and records two quantitative varia..
An antihistamine is frequently studied using a model to examine its effectiveness (compared to a placebo) in inhibiting a positive skin reaction to a known allergen. Consider the following situation. Individuals are screened to find 20 subjects wh..
prestressed wire wrapping concrete pipe is manufactured in large rolls. a quality-control inspection requires 5
An airline has surveyed a simple random sample of air travelers to find out whether they would be interested in paying a higher fare in order to have access to e-mail during their flight.
provide a detail explanation for every case1. there are 6 types of rolls available in a bakery in quantities of dozens
A researcher wishes to estimate with 99% confidence, the proportion of adults who have high-speed Internet access. Her estimate must be accurate within 2% of the true proportion.
An experiment was performed to explore the effect of a marketing campaign on web site traffic. The data in webtraff .txt are the number of weeks into the marketing campaign and the web site traffic.
You are looking at a bond to add in your portfolio. The bond has a 7.2 percent coupon (paid semiannually), 10 years left to maturity, and can be purchased at par ($1,000).
question 1 a pizza shop owner wishes to find the 95 confidence interval of the true mean cost of a large pizza. how
If a distribution appears to be bell-shaped and symmetric about its mean, can we assume that the probability of being within one standard deviation of the mean is .68?
A sample of 25 customers from Wellington Savings and Loan reveals an average savings account balance of $8350, with a standard deviation of $1800. Which of these samples has the greater relative dispersion?
Perform exploratory data analysis on all variables in the data set. Realizing that you have six groups, be sure that your exploratory analysis is broken down by group. When possible, include appropriate graphs to help illustrate the dataset.
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