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1. 99% confidence interval for u when a-3 =30 and n=144.
2. 95% confidence interval for u when a-3-30 and n=120.
3. 95% confidence interval for u when s=5 = 60 and n=25.
A certain population is composed of the numbers 4, 5, 6 and 7. What is the mean of the sampling distribution of the sample mean if each sample contains two elements?
The mean of the sample means in a sampling distribution is 2.6. What is the mean of the population from which the scores are sampled?
Suppose that samples of size n
=
4
n=4
are used to construct the sampling distribution of the sample mean. What is the largest element of the sampling distribution of the sample mean?
Determine the variance if the is 27 students for mathematics test including stem and leaf
How many possible samples of size n = 3 can be drawn from a population of size 10? *
The production cost of a metal bar is $80 per cm plus a basic cost of $100. Find the mean, median,
standard deviation, variance, and 86'' percentile of the production cost of a metal bar.
find xy in set of given below
x 12 14 10 12 14 15 12 11 11 10
y 45 60 25 25 70 45 50 50 60 70
find xy in the set of given below;
x 12 14 10 12 14 15 12 11 11 10
y 45 60 25 25 70 45 50 50 60 70
Jane has just begun her new job as on the sales force of a very competitive company. In a sample of 16 sales calls it was found that she closed the contract for an average value of 108 dollars with a standard deviation of 12 dollars. Test at 5% significance that the population mean is at least 100 dollars against the alternative that it is less than 100 dollars. Company policy requires that new members of the sales force must exceed an average of $100 per contract during the trial employment period. Can we conclude that Jane has met this requirement at the significance level of 95%?
