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A hybrid cars battery company produces batteries with mean life of 50,000 Kilometers and a standard deviation of 5000 kilometers, what is the probability that the batteries would serve between 45,000 kilometers and 55,000 kilometers
the mean resting pulse rate for a large group of varsity athletes was 72 with a standard deviation of 9.46. what
A random sample of 136 observations produced a sample mean of 33. Find the critical and observed values of z for the following test of hypothesis using a=0.02.
Parking II. Suppose that, for budget planning purposes, the city in Exercise needs a better estimate of the mean daily income from parking fees.
write a null and alternative hypothesis for the following research question is the amount of time australian children
She believed that year's students to be typical of those who will take AP Stats at that school and was pleased when 65% of her 54 students achieved scores of 3 or better. Can she claim that her school is different? Explain.
a consumer survey is trying to assess how much bad food is being purchased. bad foods are categorized into two types
Why don't researchers who want to test hypotheses about the relationships between variables worry a great deal about random sampling?
fourth group was divided into small discussion groups. A high of 10 was possible. A sample of five tests was selected from each group. The test grade results were: At the 0.01 level, what is the critical value?
If you know that the number of possible values a random variable can have is finite, do you know whether the random variable is discrete or continuous?
mcneese and klein 1991 looked at the average particle size. specifications give the standard deviation of 2 microns. a
A pump supplies oil at 25 gpm to a H-in.-diameter double-acting hydraulic cylinder. I.f the load is 12001b (extending and retracting) and the rod diameter is 3/
Give an example of r.v.s X and Y such that FX(x) = FY (x) for all x, where the inequality is strict for some x. Here FX is the CDF of X and FY is the CDF of Y.
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