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Of all the flashlights in a large shipment, 11 % have a defective bulb, 15 % have a defective battery, and 6 % have both defects. If you purchase one of the flashights in this shipment, find the probability that it has the following:
a. defective bulb or a defective battery
b. a good bulb or a good battery
c. a good bulb and a good battery
Clouds were randomly seeded or not with silver nitrate. Rainfall amounts were recorded from the clouds. The purpose of the experiment was to determine if cloud seeding increases rainfall. The following data is obtained:
Assume that a simple random sample of a population has been selected from a population that has a normal distribution, Use the formula for X2( chi square distribution) and the chi-square distribution table
The average gasoline price of one of the major oil companies in Europe has been $1.25 per liter. Recently, the company has undertaken several efficiency measures in order to reduce prices.
Stock A has an expected return of 12% and a standard deviation of 40%. Stock B has an expected return of 18% and a standard deviation of 60%. The correlation coefficient between Stocks A and B is 0.2.
Can people really identify their favorite brand of cola? Volunteer tasted coca-cola classic, pepsi, Diet coke, and Diet pepsi, with the results shown below.
It is interested in estimating a 99.97% worst case for percentage of loan that defaults on the portfolio. Show how this varies with the copula correlation.
A 1-hour flight is .02. What is the probability that (a) both will fail? (b) Neither will fail? (c) One or the other will fail? Show all steps carefully.
One of the 4 bus drivers is also randomly selected. Let Y denote the number of students on his bus. Compute the expectations of X and Y?
Find the percent of a standard Normal model found in the given region. Round to the nearest hundredth of a percent.
How do you know if a value is a solution for an inequality? How is this different from determining if a value is a solution to an equation?
Kay Manning is a sales manager with two salespeople working for her. The ability of each salesperson to secure new accounts has historically been: Jesse Burkett can generate 4 new accounts per 10 visits to prospects
Assume the probability that a person has the desease is 0.1 for all people, independently of each other. Compute the total expected number of tests necessary.
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