Mathematics, 03.12.2019 00:31 brennarfa
Executives of a supermarket chain are interested in the amount of time that customers spend in the stores during shopping trips. the executives hire a statistical consultant and ask her to determine the mean shopping time, u , of customers at the supermarkets. the consultant will collect a random sample of shopping times at the supermarkets and use the mean of these shopping times to estimate .u. assuming that the standard deviation of the population of shopping times at the supermarkets is 26 minutes, what is the minimum sample size she must collect in order for her to be95% confident that her estimate is within 3 minutes of. u?
carry your intermediate computations to at least three decimal places.
write your answer as a whole number (and make sure that it is the minimum whole number that satisfies the requirements).
Answers: 1
Mathematics, 21.06.2019 15:00
Which sum or difference identity would you use to verify that cos (180° - ∅) = -cos ∅? a. sin (α -β) = sin α cos β – cos α sin β b. cos (α -β) = cos α cos β – sin α sin β c. cos (α -β) = cos α cos β + sin α sin β d. sin (α + β) = sin α cos β + cos α sin β
Answers: 2
Mathematics, 21.06.2019 20:00
What effect would doubling all the dimensions of a triangular pyramid have on the volume of the pyramid? explain your reasoning.
Answers: 1
Mathematics, 21.06.2019 21:00
Julie buys 2kg of apples and 7kg of pears ? 12.70. the pears cost ? 1.30 per kilogram what is the price per kilogram of the apples? show your working out
Answers: 2
Executives of a supermarket chain are interested in the amount of time that customers spend in the s...
Mathematics, 22.09.2020 04:01
Mathematics, 22.09.2020 04:01
Spanish, 22.09.2020 04:01
Mathematics, 22.09.2020 04:01
Law, 22.09.2020 04:01
Mathematics, 22.09.2020 04:01
Mathematics, 22.09.2020 04:01
Mathematics, 22.09.2020 04:01
History, 22.09.2020 04:01
Mathematics, 22.09.2020 04:01