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TABLE 5-4
The following table contains the probability distribution for X = the number of traffic
accidents reported in a day in Corvallis, Oregon.
Referring to Table 5-4, the probability of 3 accidents is ________.
The amount of time necessary for assembly line workers to complete a product is a
normal variable with a mean of 15 minutes and a standard deviation of 2 minutes. So,
90% of the products require more than ________ minutes for assembly.
TABLE 10-4
Two samples each of size 25 are taken from independent populations assumed to be
normally distributed with equal variances. The first sample has a mean of 35.5 and
standard deviation of 3.0 while the second sample has a mean of 33.0 and standard
deviation of 4.0.
Referring to Table 10-4, what is the 95% confidence interval estimate for the difference
in the two means?
TABLE 5-5
From an inventory of 48 new cars being shipped to local dealerships, corporate reports
indicate that 12 have defective radios installed.
Referring to Table 5-5, what is the probability out of the 8 new cars it just received that,
when each is tested, no more than half of the cars have non-defective radios?
TABLE 2-9
The frequency distribution below represents the rents of 250 randomly selected
federally subsidized apartments in a small town.
Referring to Table 2-9, ________ of the apartments rented for at least $1,300.
TABLE 3-1
Health care issues are receiving much attention in both academic and political arenas. A
sociologist recently conducted a survey of citizens over 60 years of age whose net
worth is too high to qualify for Medicaid. The ages of 25 senior citizens were as
follows:
Referring to Table 3-1, determine the first quartile of the ages of the senior citizens.
Suppose Z has a standard normal distribution with a mean of 0 and standard deviation
of 1. The probability that Z is between -2.89 and -1.03 is ________.
