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In large population of college educated adults the man IQ score is 115 with a standard deviation of 15. Suppose 15 adults from this population are randomly slected for a survey of fear of crime.
a) What is mean of this sampling distribution (all samples of n=150) ?=
b) What is the standard deviation of sampling distribution?
c) What is the shape of sampling distribution?
d) If you change the sample size to 50 what will change?
e) What percent of sample have a mean IQ of less than 118?
A patient is tested for TB at a medical clinic
What is The probability that the clinic is idle-no patients waiting or being served and The average number of patients in the system?
I used to manage a manufacturing plant making electrical switches. We molded 15 million polypropylene parts that went into the switches and one of the machines made a part that had a critical dimension ( a diameter on the shaft ) that we ran these te..
The IQs of army volunteers in a given year are normally distributed with µ ¼ 110 and a ¼ 10. The army wants to give advanced training to the 25% of those recruits with the highest IQ scores. What is the lowest IQ score acceptable for the advanced ..
From the following frequency d istribution, find the class frequencies that are missing. Calculate mean, median and mode from the following data.
let x1x2x3 be a random sample of size three from a distribution with the probability density function.fx 2x 0ltxlt1find
Calculate the pairwise differences and make a normal probability plot of them for each test procedure (wash/no wash). For each of the two test methods test to see if there is a change in ratings over time. Test, using a = 0.05, and explain what..
find the probability density function for a normal random variable with a mean of 15 and a standard deviation of
Perform the check regarding the sample size that confirms the sampling distribution of the possible values for will be approximately normally distributed.
Poll Confidence level. It is common for public opinion polls to have a "confidence level" of 95%, meaning that there is a 0.95 probability that the poll results are accurate within the claimed margins of error.
Draw the statistics as a histogram. Do they resemble the Normal Distribution? Find the median, the average grade and the standard deviation of the two terms.
a survey is to be taken to ascertian student opinions about the quality of teaching at a high school. below are some
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