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Choose at random one of the random sample averages of 5 rectangles. Calculate the average value for a random sample of 20 rectangles. Compare these to the true mean of the 100 rectangles. Which comes closest to the true mean?
A) What is the name of the distribution of the number of satisfied customers from this sample? B) What is the expected value? C) What is the standard deviation?
Statistical Hypothesis testing - Frequency distribution
At a computer manufacturing company, the actual size of computer chips is normally distributed with a mean of 1 centimeter and the standard deviation of 0.1 centimeter. A random sample of 12 computer chips is taken. What is the possibility that th..
If the population standard deviation is known to be 7.5 hours, can we conclude at the 5% significance level that he is right?
Find the standard error of mean. Also establish an interval estimate around the sample mean using one standard deviation of the mean.
Find the probability that when 236 reservations are accepted for Flight 179, there are more passengers showing up than there are seats available.
The statistics professor plans class carefully so that length of his classes are uniformly distributed between 50 and 52 minutes. Determine the probability that class will be less than 50.25 minutes.
For the following situation, assume the random variable is normally distributed and use a normal distribution or a t-distribution to construct a 90% confidence interval for the population mean. If convenient, use technology to construct the confid..
Find a 96% confidence interval for the true percentage of all households that have central air conditioning. Write a sentence that interprets this interval.
Assume that the standard deviation of college student IQ's is 10. A random sample of 100 students from a college showed an average IQ of 110. Compute a 95% confidence interval for the mean IQ of students attending this college.
A marketing firm recently studied the number of times men and women who live alone that buy takeout dinners in a month. Two independent samples were taken one with 50 men and 55 women.
Select the answer for each question. What type of probability distribution can be used to figure out her chance of getting 10 questions right?
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