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A company manufactures light bulbs. The company wants the bulbs to have a mean life span...

A company manufactures light bulbs. The company wants the bulbs to have a mean life span of 990 hours. This average is maintained by periodically testing random samples of 16 light bulbs. If the​ t-value falls between minus t 0.99 and t 0.99​, then the company will be satisfied that it is manufacturing acceptable light bulbs. For a random​ sample, the mean life span of the sample is 1007 hours and the standard deviation is 28 hours. Assume that life spans are approximately normally distributed. Is the company making acceptable light​ bulbs? Explain. The company ▼ is is not making acceptable light bulbs because the​ t-value for the sample is t = nothing and t = 0.99 = nothing. ​(Round to two decimal places as​ needed.) .

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