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What is the mean and standard deviation of the number of frogs they should find with the trait? Can you use a normal model to approximate the distribution of frogs with the trait? Why or why not?
A basketball player makes 80 percent of his foul shots per season. In a game where he takes 7 how many shots should he make and what is the standard deviation of the number of shots he should make?
Create a time plot from the Treasury bill returns data. Here again, just use the data. You need not answer the book questions. Print the time plot and spreadsheet to be turned in.
Let Y1 and Y2 be uncorrelated random variables. Consider U1 = Y1 + Y2 and U2 = Y1-Y2. Find the covariance between U1 and U2 in terms of the variance of Y1 and Y2
Potholes occur on a major city's streets at a rate of 4.2 per mile. What is the probability that a quarter-mile stretch has more than one pothole?
Suppose, the number of children who are obese in the United States grew from 1,265,966 in 2002 to 1,819,643 in 2007. Use the geometric mean to calculate the average annual growth rate.
What type of data is the following: Hours you studied for this exam?
The overall test of the significance of the difference among groups in an analysis of variance is called:
Describe the parameter of interest for this analysis. Determine the factor associated with this experiment.
Estimate R and the number of orders per year that should be placed. Using the answer in part (a), determine the optimal (R,S) inventory policy. Assume that the shortage cost is $100 per tire.
In class, we discussed what fraction of 7-foot or taller males of an appropriate age play in the NBA. This exercise demonstrates the sensitivity of such calculations to underlying assumptions.
Also, the 20 x values have mean of 101.11 and the 20 y values have mean of 100.9. What is the best predicted IQ of the older child, given that the twin born second has an IQ of 97? Use a significanc
Please propose a study and write a description of the study Below is a tentative guideline for the paper.
Repeat 10 times the experiment of tossing a fair coin 4 times and recording the number of heads obtained. You thus obtain a random sample of size 10 from a binomial distribution with 4 trials and p
What can a researcher do to influence the size of the standard error? What can a researcher do to influence the probability of type 1 error?
In a survey of 2000 adults 50 years and older of whom 80% were retired and 20% were pre-retired, the following question was asked: Do you expect your income needs to vary from year to year in retire
1) A group of medical professionals is considering the construction of a private clinic. If the medical demand is high ( i.e., there is a favorable market for the clinic), the physicians could reali
The increased numner of small commuter planes in major airports has heightened concern over air safety. An eastern airport has recorded a monthly average of five near-misses on landing and takeoffs
Is this an observational study or an experiment? Why? What are the explanatory and response variables?
Find the sample size necessary to estimate the mean IQ score of statistics students such that it can be said with 95% confidence that the sample mean is within 5 IQ points of the true mean. Assume t
A company is working on the construction of two shopping centers. The probability that the larger one will be completed on time is 0.35 and the probability that both will be completed on time is 0.
Individuals ages 15 to 19 spend .9 hour per day using a computer for leisure. If these times follow an exponential distribution, find the proportion of each group that spends:
There are c different types of coupon and each time you obtain a coupon it is equally likely to be any of the c types. Let Yi be the additional number of coupons collected, after obtaining i distinc
The daily flow rate of contaminant from an industrial plant is modeled by a normal random variable with a mean value of 10 units and a c.o.v. of 20%. When the contaminant flow exceeds 14 units on a
Suppose that your wireless mouse has a single battery and that you buy batteries that have a mean lifetime of 6 weeks with a standard deviation of 1.5 weeks. As each battery dies, it is replaced wit