STA2023-20231-1V-M-004 Elementary Statistics I - INTERNET 08:00 AM IN | VC .. > Module 4 Assessme An LED light bulb manufacturer claims that the average lifespan of its 60-watt LED light bulbs is 38,000 hours. A corporate watchdog group is suspicious of the company's claim and thinks that the true average lifespan of the 60-watt LED light bulbs produced by the company may be less than the advertised 38,000 hours. The group collected and tested a random sample of 241 light bulbs and found the average lifespan of the sample was 37,961 hours, Use the p-value method to test the hypothesis that the mean lifespan of this brand of 60-watt LED light bulb is less than 38,000 hours, using a significance level of 2.5%. Assume the standard deviation of the lifespan of all such light bulbs is known to be 580 hours. State the null and alternative hypothesis for this test. Ho: HEY Determine if this test is left-tailed, right-tailed, or two-tailed. left-tailed Oright-tailed two-tailed Should the standard normal (2) distribution or Student's (t) distribution be used for this test? The standard normal (2) distribution should be used The Student's t distribution should be used Determine the test statistic for the hypothesis test. Round the solution to two decimal places