(CO 1) In a normally distributed data set of how long customers stay in your store,...

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(CO 1) In a normally distributed data set of how long customers stay in your store,...

(CO 1) In a normally distributed data set of how long customers stay in your store, the mean is 50.3 minutes and the standard deviation is 3.6 minutes. Within what range would you expect 95% of your customers to stay in your store

39.5-61.1

46.7-53.9

43.1-57.5

48.5-52.1

math Statistics-And-Probability

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Answer 1

Answer #1

Given that

mean = 50.3 , s.d = 3.6

Solution :

From empirical rule 95 % of data lies within 2 s.d's from the mean i.e.,

so,

= 50.3 - ( 2 * 3.6 ) = 43.1

50.3 + ( 2 * 3.6 ) = 57.5

Therefore

Answer : 43.1 - 57.5

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Answer 2

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