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Weakly earnings on a certain import venture are approximately normally distributed with a known mean of 219 and unknown standard deviation. If the proportion of earnings over 291 is 0.155, find the standard deviation.
question an electronics company is about to launch a new product. if the serial number for each piece produced has
the mean length of time per week that students at a certain school spend on their homework is 24.3 hours with a
Average cost of $3,200 for products. n=25. After review it seems mean cost is $2,000 with a standard deviation of $150. Test that average cost is $3,200 or more versus $2,000. assume level of significance of .05.
Find the sample correlation between returns on assets and the ratio of loans to deposits. Interpret the intercept and slope of the estimated regression line.
between 4 and 9 pm cars place orders at the drive through window of the tiki takeout restaurant once every 5
Evaluate the functions for the values of x given as 1, 2, 4, 8, and 16. Describe the differences in the rate at which each function changes with increasing values of x.
1.What are the most common reasons you would select a non-parametric test over the parametric alternative?
the abcd football association is considering a super ten football conference. the top 10 football teams in the country
John, a medical practitioner at a private medical facility, is discussing the problem that one of his patients, Tom, says he has been having with the medication that the doctor has prescribed.
Create the indicated confidence interval for population mean using (a) t-distribution. (b) If you had incorrectly used normal distribution, which interval would be wider?
suppose that a hypothesis test is performed at a small significance level. state the appropriate conclusion in each
A craftsperson makes stuffed animals for sale. 85% of the animals she makes are bears while the remaining 15% are rabbits. Suppose she sells 75% of her bears at craft shows but only 50% of her rabbits are sold at craft shows.
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