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Should the statistician use a t distribution, a normal distribution, or neither to test the null hypothesis?
The sample mean (x-bar) for a data set is 131.8, s is 16.7 and n = 12. The data is approximately normal and σ is unknown.
H0: µ = 136.8
H1: µ ≠ 136.8
When we take the sample of 100 of these average is $500 and SD is $100. (a) Determine statement to make about range $300 to $700?
An online shoe retailer sells men's shoes in sizes 8 to 13. In the past orders for the different shoe sizes have followed the distribution given in the table.
Define the standard error of the mean. What happens to the standard error as the sample size increases? Explain
Consider the following average monthly prices for regular gasoline in California in 2008.
according to the 2003 law enforcement management and administrative statistics lemas survey there was a mean of 1.32 s
Find the probability of getting a head and rolling a six
suppose the joint pdf of lifetimes of a certain part and a spare is given byfx y e?xy 0 lt x lt ? 0 lt y lt ?and zero
the following partial minitab printout of a regression analysis where x is the length in centimeters and y is the
What sample size would be needed to obtain an error of ±10 square millimeters with 99 percent confidence?
A random sample of stipends of teaching assistants in economics is listed below. Is there sufficient evidence at the alpha=.05 level to conclude that the average stipend different from $15,000? The data is listed below:
How are his views on slavery influenced by predominant ideas about race? In addition, compare Lincoln's position on slavery and race relations?
components used in a cellular telephone are manufactured with nominal dimension of .3 mm and lower and upper
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