The price of all new editions of Huawei tablets is normally distributed with mean 1250 S.R....

The price of all new editions of Huawei tablets is normally distributed with mean 1250 S.R.

and standard deviation 400 S.R. What is the probability that a sample of 100 tablets will have a sample mean that is more than 1300 S.R.?

Solutions

Expert Solution

Solution :

Given that ,

mean = = 1250

standard deviation = = 400

n = 100

= 1250

= / n = 400 / 100 =40

P( > 1300) = 1 - P( <1300 )

= 1 - P[( - ) / < (1300-1250) /40 ]

= 1 - P(z <1.25 )

Using z table

= 1 - 0.8944

= 0.1056

probability=0.1056

orchestra answered 2 years ago

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