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1 determine manually the lower and upper limits on sample standard deviations using your own populations mu sigma for
sonys new optical disk system prototype tested and claimed to be able to record an average of 12 hours of
the average customer of the halifax bank in britain of whom there are 76 million received 3600 when the institution
finaid is a new free web site that helps people obtain information on 180000 college tuition aid awards a random sample
in may 2007 a banker was arrested and charged with insider trading after government investigators had secretly looked
in given problem suppose the confidence interval contained the value 000 how could the bankers attorney use this
a small british computer-game firm eidos interactive plc stunned the us- and japan-dominated market for computer games
in a survey fortune rated companies on a 0 to 10 scale a random sample of 10 firms and their scores is as followsfedex
acording to a survey published in the financial times 56 of executives at britains top 500 companies are less willing
fifty years after the birth of duty-free shopping at international airports and border-crossing facilities the european
when nyse nasdaq and the british government bonds market were planning to change prices of shares and bonds from powers
a survey of 5250 business travelers worldwide conducted by oag business travel lifestyle indicated that 91 of business
use the following random sample of suitcase prices to construct a 90 confi- dence interval for the average suitcase
according to money 60 of men have significant balding by age 5024 if this finding is based on a random sample of 1000
an estimate of the average length of pins produced by an automatic lathe is wanted to within 0002 inch with a 95
wells fargo bank based in san francisco offered the option of applying for a loan over the internetif a random sample
an estimate of the percentage defective in a lot of pins supplied by a vendor is desired to within 1 with a 90
a new low-calorie pizza introduced by pizza hut has an average of 150 calories per sliceif this number is based on a
small-fry funds trade at an average of 20 discount to net asset value if sigma 8 and n 36 give the 95 confidence
suppose you have a confidence interval based on a sample of size nusing the same level of confidence how large a sample
the width of a 95 confidence interval for micro is 10 unitsif everything else stays the same how wide would a 90
a telephone company wants to estimate the average length of long-distance calls during weekends a random sample of 50
an insurance company handling malpractice cases is interested in estimating the average amount of claims against
the manufacturer of batteries used in small electric appliances wants to estimate the average life of a batterya random
a tire manufacturer wants to estimate the average number of miles that may be driven on a tire of a certain type before