A firm produces light bulbs, they want to know whether it is fair to say its light bulbs typically last more than 1500 hours. Hoping to find support for their claim, the firm collects a random sample and records the lifetime (in hours) of each bulb. The information needed for a hypothesis test is given below.     Sample mean 1,520 Std error of mean [s/sqrt(n)] 12.5 Degrees of freedom 15 Conduct an assessment with a five step process to check the claim their bulbs will last more 1,500 hours. Use the 1% level of significance.

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A firm produces light bulbs, they want to know whether it is fair to say its light bulbs typically last more than 1500 hours. Hoping to find support for their claim, the firm collects a random sample and records the lifetime (in hours) of each bulb. The information needed for a hypothesis test is given below.

 

 

Sample mean

1,520

Std error of mean [s/sqrt(n)]

12.5

Degrees of freedom

15

Conduct an assessment with a five step process to check the claim their bulbs will last more 1,500 hours. Use the 1% level of significance.

Please do on Excel 

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