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1. The J.O. Supplies Company buys calculators from a Korean supplier. The probability of a defective calculator is 20%. If 14 calculators are selected at random, what is the probability that less than 3 of the calculators will be defective?
2. An important part of the customer services responsibilities of a cable of company relates to the speed with which trouble in service can be repaired. Historically, the data show that the probability is 0.30 that troubles in a residential services can be repaired on the same day. For the first fifteen troubles reported on a given day, what is the probability that 7 or more troubles will be repaired on the same day?
3. Given the length an athlete throws a hammer is normal random variable with mean 60 feet and standard deviation 4 feet, what is the probability he throws it between 55 feet and 62 feet?
4. If x is a binomial random variable where n=150 and p=0.4, find the probability that X is more than or equal to 55 using the normal approximation to the binomial.
1) Class records at Rockwood College indicate that a student selected at random has probability 0.71 of passing French 101. For the student who passes French 101, the probability is 0.9 that he or she will pass French 102. What is the probability tha..
Describes the theory the researchers explore
Mickey Lawson is considering investing some money that he inherited. The following payoff table gives the profits that would be realized during the next year for each of three investment alternatives Mickey is considering:
The number of power outages at a golf course has a Poisson distribution with a mean of 7 outages per year. the probability that there will be between 1 and 2 inclusive power outages in a year is?
Explain how you would show each of the following in a report: The results of a t test with 38 degrees of freedom, where the obtained value of t was 1.38, and the significance level was p The proper placement of a figure within the text. The proper pl..
A random variable X has E(X)=3 and V(X)=7. Define a new random variable: Y=6X + 3. What is E(Y) and V(Y)?
Let X be the sample mean of a random sample of size n from a uniform distributionon the interval [0, b], and let bb = 2X be an estimator of the upper endpoint b.(a) Demonstrate that bb is an unbiased estimator of b, and find the variance of th..
Describe the assumptions of normality and homogeneity of variance. When these assumptions are violated, what are your options? Are there cases in which the assumptions may technically be violated, yet have no impact on your intended analyses? Explain
What is the coefficient of correlation"r"? Do you think this "r" value suggests a strong correlation among the predictors ( the independent variables?
A project manager needs to purchase parts for a project. Two suppliers are found and both of them have been used before and have delivered on time 90% of the time and have been late 10% of the time. If the project manager splits the order be..
how do i examine correlations of all variables 1 dv amp 5 iv and summarize their relationship? ltbrgti also want to
8-4 The wheat harvesting season in the American Midwest is short, and most farmers deliver their truckloads of wheat to a giant central storage bin within a two-week span. Because of this, wheat-filled trucks waiting to unload and return to the field..
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