customers returning items
Statistics – Standard Deviation
July 9, 2019The mean age at which men in the United States marry for the first time
July 9, 2019Best Electronics, Inc. offers a “no hassle” returns policy. The number of items returned per day follows the normal distribution. The meannumber of customer returns is 10.4 per day and the standard deviationis 2.3 per day.
(a) In what percent of the days are there 7.5 or fewer customers returning items? (Round z-score computation to 2 decimal places and your final answer to 2 decimal places.)
(b) In what percent of the days are between 11 and 12 customers returning items? (Round z-score computation to 2 decimal places and your final answer to 2 decimal places. )
(c) Is there any chance of a day with no returns?
Please see the attached file.
Best Electronics, Inc. offers a “no hassle” returns policy. The number of items returned per day follows the normal distribution. The mean number of customer returns is 10.4 per day and the standard deviation is 2.3 per day. …
Computer customers returning items.
