Homework help

In a sample of 13 randomly selected high school seniors, the mean score on a standardized test was 1182 and the standard deviation was 165.5. Further research suggests that the population mean score on this test for high school seniors is 1011. Does the t-value for the original sample fall between - t0_95 and to_95? Assume that the population of test scores for high school seniors is normally distributed. The t-value of t= D E] fall between -t0_95 and t0_95 because toss = D. (Round to two decimal places as needed.) A company manufactures light bulbs. The company wants the bulbs to have a mean life span of 1008 hours. This average is maintained by periodically testing random samples of 16 light bulbs. If the t-value falls between - t0_99 and t0_99, then the company will be satised that it is manufacturing acceptable light bulbs. For a random sample, the mean life span of the sample is 1023 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 |:l making acceptable light bulbs because the t-value for the sample is t= El and t0_99 = '1. (Round to two decimal places as needed.)