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The fast food supplier reported that the internet usage in the country increased on average 90...

The fast food supplier reported that the internet usage in the country increased on average 90 minutes per day assuming the fast food is following the normal distribution. The duration of 5 internet usage are recorded before and after .Test the claim for the mean growth of 95%

before   after

1 288      312

2 274      390.3

3   388 391.7

4   252     299

5   488      550

Math   Statistics-And-Probability   
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