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The number of potholes in any given 1 mile stretch of freeway pavement in Pennsylvania has a Normal distribution. This distribution has a mean of 39 and a standard deviation of 7. Using the Empirical Rule, what is the approximate percentage of 1-mile long roadways with potholes numbering between 18 and 53?
Growth of pine trees. The Department of Biology at Kenyon College conducted an experiment to study the growth of pine trees. In April 1990, volunteers planted 1000 white pine (Pinus strobus) seedlings at the Brown Family Environmental Center. The ..
In order to satisfy governmental regulations, the institution wishes to determine if gender has an impact on approval time. What is the model now? What hypothesis would you test to establish no impact of gender?
A hat contains a number of cubes: 15 red, 10 white, 5 blue, and 20 black. One cube is chosen at random. What is the probability that it is.
Hi,The nature of my data in my thesis is clustering (students within college within universities) and students' responses is binary,so I have used Multilevel Generalized Linear Model> (logistic regression) in R with (glmer) function in (lme4) pack..
A random sample of 94 customers, who visited a department store, spent an average of $81 at this store. Suppose the standard deviation of expenditures at this store is σ = $20. The 98% confidence interval for the population mean (rounded to two d..
according to one study that looked at the percent of left-handed people by state 11.6 of people in indiana are
Briefly describe how the standard deviation influences the outcome of the hypothesis test. How does standard deviation influence measures of effect size?
1. a basketball player makes 60 of her free throws. she takes 7 free throws in a game. if the shots are independent of
People are surprised to find that it is not all that uncommon for two people in a group of 20 to 30 people to have the same birthday.
show that if x and y are independent poisson random variables with parameters lambda1 gt 0 and lambda2 gt 0 thenpx y
question a market researcher wants to test to determine if families of four in city a spend less per week on average
Cruise ships of the Royal Viking line report that 80 percent of their rooms are occupied during September. For a cruise ship having 800 rooms, what is the probability that 665 or more are occupied in September?
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