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1. Find the probability that a standard normal random variable will have a value less than or equal to -2.5.
2. Find the probability that a standard normal random variable will be greater in value than -2.33.
Statistics and Probability, Statistics
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In 20% of families the father has celiac disease (Event F) while the mother does not, in 15% of families the mother has celiac disease (Event M) and the father does not, and in 5% of families both the mother and the fath ...
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A statistics student has collected data from a random sample of 20 college students at his school. He collected data on many variables including GPA (grade point average) and how many hours per week they play video games ...
An electronics store receives a shipment of 37 graphing calculators, including 5 that are defective. Eight calculators are chosen at random to be sent to a local high school. How many selections contain 3 defective?
You want to you want to estimate the mean weight of quarters in circulation. A sample of 30 quarters has a mean weight of 5.649 grams in a standard deviation of 0.066 gram. Use a single value to estimate the mean weight ...
Approximately once a month cars are shipped from Rotterdam, Holland to Lagos, Nigeria. The past data collection indicates that the weight of a car is normally distributed with the mean of 1,070 kg and the standard devia ...
What is the 99% confidence interval for a sample of 52 seat belts that have a mean length of 85.6 inches long and a standard deviation of 3.8 inches?
According to the Polk Company, a survey of households using the Internet in buying or leasing cars reported that 81% were seeking information about prices. In addition, 44% were seeking information about products offered ...
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