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Suppose that lifetimes of light bulbs produced by a certain company are normal random variables with mean 1000 hours and standard deviation 100 hours. Suppose that lifetimes of light bulbs produced by a second company are normal random variables with mean 900 hours and standard deviation 150 hours. Howard buys one light bulb manufactured by the first company and one by the second company. What is the probability that at least one of them lasts 980 or more hours?
Descriptive Statistical Analysis on Youngsters Involved in Alcohol
Complete the frequency table with frequency and relative frequency. Express the relative frequency to two decimal places - What is the minimum in the grade
In order to predict the sales price of a sports car, several factors are being investigated. These factors include the speed at ¼ mile (mph), horsepower, and curb weight (in lbs). The data is provided below. You should be able to copy and paste th..
Tall or short? Mr. Walker measures the heights (in inches) of the students in one of his classes. He uses a computer to calculate the following numerical.
Following data on x=weight (in pounds): x 1 33.5, x2 27.3, x3 36.7, x4 30.5 Suppose that one more piece is selected; denote its weight by x5. Find a value of x5 such that X = smaple median.
in studies for a medication 13 percent of patients gain weight as a side effect. suppose 514 patients are randomly
Let X be a sample obtained using the stratified simple random sampling plan described previously.
a recent survey asked adults about their beliefs about premarital sex and whether they thought birth control should be
Construct a probability distribution table. (b) if p=0.4, find the expected net profit. (c) what is the smallest value of P for which the owner will take the risk to undertake this project?
Most undergraduate business students will not go on to become actual practitioners of statistical research and analysis. Considering this fact, why should such individuals bother to become familiar with business statistics?
Compute the 99% confidence interval for the population mean based on the sample 62, 68, 61, 64, 65, 62, and 66. Then, change the number from 66 to 16 and calculate the confidence interval.
When processing oil into heating oil, there are no partial amounts (i.e. the oil must be processed to complete heating oil; no partial composition). An LP program has been established to maximize profits for the production of the three types of o..
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