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a local music store wishes to determine the mean education level of its clients they conduct a survey of 100 clients
define the margin of error explain the relation between the confidence interval and the error estimate suppose a
religious beliefsa journal article that deals with changes in religious beliefs over time states for these subjects the
a company that sells products through mail-order catalogs wants to evaluate whether the mean sales for their most
why would manufacturers and businesses be interested in constructing a confidence interval for the population variance
describe the process for finding probabilities using z-scores and the standard normal
1 the heights of students in a class are normally distributed with mean 56 inches and standard deviation 4 inches use
rajs razors manufacturing company has four production facilities the table below gives the coordinates and number of
a local beverage store wishes to determine the average age of its clients they conduct a survey of 100 clients which
a local newspaper conducts a survey of 350 subscribers concerning their reading habits ninety-five people read the
show any work needed1nbspsuppose you are considering two investments and the critical issues are the rates of return
the body temperatures of adults have a mean of 986degreesdegf and a standard deviation of 060degreesdeg f describe the
1nbsp5 patients qualify to have a surgical procedure performed the doctor states that there is an 80 chance of a
a local political candidate conducts a telephone survey of 250 voters concerning their opinion of local issues
one hundred tractor-trailer trucks are weighed at a highway weigh station from a normal population the average weight
nine automobiles are sampled to measure gas mileage the results yield an average of 226 miles per gallon with a
in a population of 1250 executives the mean amount spent on lunch per day is 750 with a standard deviation of 500 what
a human resource director wishes to develop an interval estimate for test scores on an exam she wants the interval to
the new director of an employment agency wishes to determine the percentage of applicants that speak a second language
twenty-five desserts are sampled to measure calorie content the results yield an average of 225 calories per bite with
consider two independent random variables x and y x has a uniform distribution on the interval 0 3 the probability
a sociologist wants to know the average number of times families eat out per week data was collected from 50 families
the mean gas mileage for a hybrid car is 57 miles per gallon suppose that the gasoline mileage is approximately
for a normal distribution with a mean of 169 and a standard deviation of 30 what is the z value distance from the mean
for this set of numbers 40 40 45 43 48 45 40 40 40 40 40 40 40 48 43 40 43 40 40 45nbsp what is the mean standard