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Question 1:
A mail-order firm has a circular which elicits a 10% response rate. Suppose 20 of the circulars are mailed as a market test in a new geographic area. Assuming that the 10% response rate is applicable in the new area, determine the probability that
(i) no one responds,
(ii) exactly two people respond,
(iii) less than 20% of the people respond.
Question 2:
The packaging process in a breakfast cereal company has been adjusted so that an average of 13.0 oz of cereal is placed in each package. Of course, not all packages have precisely 13.0 oz because of random sources of variability. The standard deviation of the actual net weight is 0.1 oz and the distribution of weights is known to follow the normal probability distribution.
(i) What is the probability that the weight of the cereal will exceed 13.25 oz?
(ii) Evaluate the probability that a randomly chosen package will contain between 13.0 and 13.2 oz of cereal.
What is the properties of a simple random sample when 50 females are numbered 1 through 50, and males are numbered 51 through 100?
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A Biology student estimates that the probability that a certain organism will live beyond 24 hours is .40. If he conducts on 7 of this type or organisms, find the probability that
Now imagine that consumption is given as: C = 400 + 0.9YD - 1,750i And as above: Y = PE = C + I + G + NX (Income identity)
solved example with data of bi variate frequency distribution
What is probability
V ariance A measure of dispersion the variance represents the average distance from any given observation in a series to the mean of that series in the units squared.
Ask questio How many women must be randomly selected to estimate the mean weight of women in one age group? We want 90% confidence that the sample mean is within 3.7 lbs of the po
). Calculate Karl Pearson’s coefficient of correlation from the following data , using 20 as the working mean for price and 70 as the working mean for demand: Price: 14 16 17 18 1
A machine that fills quart milk cartons is set up to average 32.2 oz per carton, with a standard deviation of 1.2 oz. Assume a normal distribution for all of the cartons filled, wh
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