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Toss a fair die twice, and record the numbers. Find the probability that the first number is 3 given that the sum of two numbers is odd.
At a board meeting of 20 businessmen, all of whom wear ties, what is the probability that:
1.an inventor claims that a device increases gas mileage by 4. a test of the device was done by randomly selecting 10
A recent article in theWall Street Journal reported that the prime rate for large banks now exceeds 9 percent. A sample of eight small banks in the Midwest revealed the following prime rates (in percent):
using the december follow-up data listed below is there a significant difference between school a children and school b
you conducted a t-test in your capstone research. you did not find a statistically significant difference between your
The chart at the right. Does this sample indicate that songs classified as dance music have lower beats per minute than the songs ranked on a Top 200 list?
The manager of a local bank wants to estimate the average amount held in checking accounts by the customers. A random sample of 30 customers is selected, and the results indicate a sample average of $4,750 and a sample standard deviation of $1,200..
a piece of rope is made up of 100 strands. assume that the breaking strength of the rope is the sum of the breaking
the average number of mosquitos in a stagnant pond is 70 per square meter with a standard deviation of 12. if 9 square
if the same mean is 11 the hypothesized population mean 10 and the population standard deviation is 4 compute the test
At 0.05 level of significance, is there enough evidence to conclude that difference exists between proportion of students who have ear infections at one school and the other?
Find the 90% confidence interval for the standard deviation for the time it takes an inspector to check a bus for safety if a sample of 27 buses has a standard deviation of 6.8 minutes.
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