TABLE 5-9
A major hotel chain keeps a record of the number of mishandled bags per 1,000
customers. In a recent year, the hotel chain had 4.06 mishandled bags per 1,000
customers. Assume that the number of mishandled bags has a Poisson distribution.
Referring to Table 5-9, what is the probability that in the next 1,000 customers, the
hotel chain will have no mishandled bags?
TABLE 13-13
In this era of tough economic conditions, voters increasingly ask the question: “Is the
educational achievement level of students dependent on the amount of money the state
in which they reside spends on education?” The partial computer output below is the
result of using spending per student ($) as the independent variable and composite score
which is the sum of the math, science and reading scores as the dependent variable on
35 states that participated in a study. The table includes only partial results.
Referring to Table 13-13, the value of the measured t test statistic to test whether
composite score depends linearly on spending per student is ________.
TABLE 2-14
The table below contains the number of people who own a portable Blu-ray player in a
sample of 600 broken down by gender.
Referring to Table 2-14, ________ percent of the 600 were females who either owned
or did not own a portable Blu-ray player.
TABLE 16-15
Given below are the average prices for three types of energy products for five
consecutive years.
Referring to Table 16-15, what is the Laspeyres price index for the group of three
energy items in year 5 for a family that consumed 15 units of electricity, 24 units of
natural gas and 200 units of fuel oil in year 1 using year 1 as the base year?
TABLE 8-15
The president of a university is concerned that illicit drug use on campus is higher than
the 5% targeted level. A random sample of 250 students from a population of 2,000
revealed that 7 of them had used illicit drugs during the last 12 months.
Referring to Table 8-15, what is the critical value for the 90% one-sided confidence
interval for the proportion of students who had used illicit drugs during the last 12
months?
TABLE 6-2
John has two jobs. For daytime work at a jewelry store he is paid $15,000 per month,
plus a commission. His monthly commission is normally distributed with a mean of
$10,000 and a standard deviation of $2,000. At night he works occasionally as a waiter,
for which his monthly income is normally distributed with a mean of $1,000 and a
standard deviation of $300. John’s income levels from these two sources are
independent of each other.
Referring to Table 6-2, John’s income as a waiter will be between what two values
symmetrically distributed around the population mean 90% of the time?
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. The
probability is ________ that a product is assembled in between 14 and 16 minutes.
TABLE 7-1
The time spent studying by students in the week before final exams follows a normal
distribution with a standard deviation of 8 hours. A random sample of 4 students was
taken in order to estimate the mean study time for the population of all students.
Referring to Table 7-1, what is the probability that the sample mean is more than 3
hours below the population mean?