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suppose x is a binomial random variable with n 20 and p 02 find the probability that x le 10 using binomial tables
for a newborn full-term infant the weight appropriate for gestational age is assumed to be normally distributed with mu
1 a particular brand of sugar is sold in 5-lb packages the weight of sugar in these packages can be assumed to be
1 let the population be given by 1nbsp2nbsp3 letnbsppxnbsp 13 fornbspxnbsp 1nbsp2nbsp3 take samples of size 3 with
a how many different samples of size n 2 can be chosen from a nite population of size 12 if the sampling is without
let the population be given by the numbers -2nbsp-1nbsp0nbsp1nbsp2 take all random samples of size 3a without
1 color blindness appears in 2 of the people in a certain population how large must a random sample be in order to be
1 how large should the size of a random sample be so that we can be 90 certain that the sample meannbspxnbspwill not
suppose that the number of cars arriving in 1 hour at a busy intersection is a poisson probability distribution with
let x be a random variable with probability density function 630x41 - x4 0 lt xgt 1fx 0 otherwisea
a random sample was taken of 300 undergraduate students from a university the students in the sample were classied
the following table gives the opinion on collective bargaining by a random sample of 200 employees of a school system
the following data give sat mean scores for math by state for 1989 and 1999 for 20 randomly selected states
the iqs of 17 students from one area of a city showed a mean of 106 with a standard deviation of 10 whereas the iqs of
two sets of elementary school children were taught to read by different methods 50 by each method at the conclusion of
a manufacturer claims that the mean life of batteries manufactured by his company is at least 44 months a random sample
1 it is claimed that two of three americans say that the chances of world peace are seriously threatened by the nuclear
it was claimed that the average annual expenditures per consumer unit had continued to rise as measured by the consumer
a company that manufactures precision special-alloy steel shafts claims that the variance in the diameters of shafts is
in order to nd out whether children with chronic diarrhea have the same average hemo- globin level hb that is normally
the principal of a charter school in tampa believes that the iqs of its students are above the national average of 100
a sample of 10 observations taken from a normally distributed population produced the following data44 31 52
the following information was obtained from two independent samples selected from two normally distributed populations
suppose the following data represent thickness between and within silicon wafers in microns with a target value of 145