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Problem: 10.5% of the population is 65 or older. Find the probability that the following number of persons selected at random from 25 people are 65 or older.
1. find the critical value. assume that the test is twotailed and that n denotes the number of pairs of data. n 30 a
Using the empirical rule, what is the approximate percentage of the men between the following values? A. 176 cm and 186 cm B. 166 cm and 196 cm.
which of the following pairs of class limits would be appropriate for grouping the numbers 11 14 9 and 16?a 8-12 and
The quality control inspector of a production plant will reject a batch of syringes if 2 or more defective syringes is found in a random sample of 8 syringes taken from the batch. Suppose the batch 1% defective syringes.
The standard deviaiton is 2 pounds. If 15% of the suitcases are overweight, find the maximum weight allowed by the airline. Assume the variable is normally distributed.
With a sample standard deviation of 200 pounds. We know the sample is from a normal distribution. The 95% confidence interval of the true mean is?
Find a 95% confidence interval for the proportion p of the inner-city, working-class group who eventually became alcoholics.
Construct a 95% confidence interval for the proportion of all those who experience some type of discomfort.
An independent-measures research study was used to compare two treatment conditions with n = 4 participants in each treatment. The first treatment had a mean of M = 58 with a variance of s^2 = 28, and the second treatment had M = 52 with s^2 = 36.
What sample size would be needed to obtain an error of ±10 square millimeters with 99 percent confidence?
Please help me with the following 3 problems. There are only a few that I can't seem to figure out. Please use excel and show me a step by step solution to give me a full understanding. Thanks a lot!
Calculate the value of chi-square. What is your decision regarding H 0 ?
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