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The population mean and standard deviation are given below. Find the required propability and determine wheather the given sample mean would be considered unusual.
For a sample of n = 70 , find the probability of a sample mean being less than 22.1 if u= 22 and o' = 1.33
In fitting the simple linear regression model Yi ~ N (α + β xi, σ 2 ) to the following data:
question 1 the average price of a gallon of unleaded regular gasoline was reported to be 3.13 in illinois. use this
True mean when using a confidence interval of 95%. The standard deviation is estimated at $25. How many lunch receipts must they sample?
If many samples of size 1000 persons are chosen, determine the expected value (mean X-bar) or average of average IQ's for these samples?
Adults is approximately normal with a mean of 191 lbs. and a standard deviation of 20 lbs. Using the 68-95-99.7 rule. What percent of males weigh more than 211 lbs?
a short quiz has two truefalse questions and one multiple choice question with four choices. a student guesses at each
a confidence interval is desired for the true average stray-load loss u watts for a certain type of induction motor
A sample of 65 business people was randomly selected and given a leadership test. Construct a 95 percent confidence interval for the mean score on this test, using the estimated standard error of the mean.
a large industrial firm allows a discount on any invoice that is paid within 30 days. of all invoices 10 receive the
1. in 2005 the average gpa for students was 3.15. a sample in 2008 showed that the average gpa for students was 3.46.
suppose that a 2-year old boy named cahnce sits at a computer and types exactly 6 unique alphabet keys. what is the
art, French, and mathematics. He chooses art with probability 5/8, French with probability 5/8, and art and French together with probability 1/4. What is the probability that he chooses mathematics?
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