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If a sample is subdivided into subsamples, a minimal sample size of 30 is necessary for every subsample?
A. true
B. False
a simple random sample of 12 e-readers of a certain type had the following minutes of battery life.287 311262 392 313
if you upload an image please make sure it is clear and your writing is legible.a telemarketer makes 80 calls in a one
if the random variable z is the standard normal score and a gt 0 is it true that pz lt -a pz gt a? why or why not?
Heights of college-aged women are approximately bell-shaped and symmetric, with almost all of them (95%) falling between 58" and 72". Find the approximate values of the mean and standard deviation.
Use this information to find the upper and lower limits of the first class if you wish to construct a frequency distribution with 10 classes.
The Precision Scientific Instrument Company manufactures thermometers which are supposed to give readings of 0o C at the freezing point of water.
I did a study correlating net profit per location with expenditures on an in-house promotion, and got a correlation of about .15, and that was received very well.
This sample has a mean weight of 5.03 Kg and a standard deviation of 0.21 Kg. Can we calculate that the mean weight produced by the machine has increased? Use 5% level of significance.
consider the following bivariate data.point a b c d e f g h i jx 3 3 2 6 3 7 2 2 6 6y 7 1 5 6 3 7 5 7 2 5a construct a
Find the equation of the least squares regression line that models the relationship between square footage and rental amount and interpret the meaning of the coefficients.
the compressive strength of samples of cement can be modeled by a normal distribution with a mean of 6000 kilograms per
the mean price of ground beef in 75 cities in the midwest is 2.11 and teh standard deviation is .56. a midwest grocer
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