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If the population standard deviation for the average loss was 16 tons per acre, determine the margin of error for estimating the mean loss per acre for a confidence level of 95% for sample sizes of farmers ranging from 289, 324 and 361. What would be your recommendation to the local Farm Bureau for estimating the average loss of production per acre, given the data you have at hand?
Solve by completing the square: Solve using the square root property:
At the time she was hired as a server at the Grumney Family Restaurant, Beth Brigden was told, "You can average $72 a day in tips." Assume the population of daily tips is normally distributed with a standard deviation of $2.45.
The life expectancy of computer terminals is normally distributed with a mean of 4 years and a standard deviation of 10 months. What is the probability that a randomly selected terminal will last more than 5 years?
For a lottery to be successful, the public must have con dence in its fairness. One of the lotteries in Maryland is Pick-3 Lottery. Write down the test statistic to be used for testing the hypothesis.
The same for each of the four quarters next year. The seasonal factor for the second quarter is 145. Determine the seasonally adjusted sales for the second quarter of next year.
The grade point average of the students at UTC is 2.80 with a standard deviation of 0.84. The grade point average of students at UTK is 2.4 with a standard deviation of 0.84. Which university shows a more dispersed grade distribution?
Using excel, construct a 90% confidence interval for the proportion of musicians who began playing while in elementary school.
Calculate the test statistic for testing the null hypothesis. The slass mean will be not be signfically different from the population mean. What is your decision about the null hypothesis?"
A window is in the shape of a square of side s, with a semicircle of diameter s above it. Write a function that expresses the total area of the window as a function of s.
With the test statistic you chose, work out the problem with solution using .05 level of significance if it applies.
The data (in milliamps) are shown below. Using the .05 level of significance, are there any differences in the three categories.
Construct the following confidence intervals for your data set:
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