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assume that the data has a normal distribution and the number of observations is greater than fifty find the critical z
in a random sample of 565 college students 150 had part-time jobs find the margin of error for the 925 percent
question you are about to enroll in a course for which you know that 20 of the students will receive as do you think
use the given data to construct a confidence interval for the population mean micro assume that the population has a
question jan is a member of a class with 20 students that meets daily each day for a week monday to friday a student in
consider the test of the claims that the two samples described below come from two populations whose means are equal vs
question find information on a random circumstance in the news identify the circumstance and possible outcomes and
a book about college reports that the mean time students study each week is 1015 minutes a dean says she believes the
question identify three random circumstances in the following story and give the possible outcomes for each of themit
a business statistics professor would like to develop a regression model to predict the final exam scores for students
question suppose that you live in a city that has 125000 households with telephones and a polling organization randomly
the owner of a cleaning service would like to predict the amount of time in minutes required to clean a house y based
question a car dealer has noticed that 1 out of 25 new-car buyers returns the car for warranty work within the first
the following problems are designed to give you practice calculating z scores and using them to solve problemsnbspi
the scientific productivity of major world cities was the subject of a recent study the study determined the number of
suppose a group of 900 smokers who all wanted to give up smoking were randomly assigned to recieve an antidepressant
a a random sample of elementary school children in new york state is selected to estimate the proportion p of school
for 30 randomly selected rolling stones concerts the mean gross earnings is 275 million dollars assuming a population
question find an example of an observational study in the news answer the following questions about it be sure to
an article in the national newspaper on march 16 2013 stated that nearly 45 percent of all canadians have brown eyes a
question is it possible for each of the following to be used in the same study on the same units explain or give an
question find an example of a randomized experiment in the news answer the following questions about it be sure to
question refer to example dull rats which was done by using a completely randomized designa what were the treatments in
question in an experiment done at an english university 64 students held their hands in ice water for as long as they