CHALLENGE ACTIVITY 5.2.2: Excel: Hypothesis test for a population mean. Click this link to download the spreadsheet for use in this activity. 469946.3289048.qx3zqy7 Jump to level 1 Use Sheet 5 of the Excel file to answer the following questions. A company that makes LED light bulbs claims that the bulbs have a lifetime of 11,000 hours. Quality control tests a random sample of 45 light bulbs to determine if the lifetime is less than 11,000 hours at a significance level of 0.05. Create a histogram, and calculate, the t-statistic, and the p-value. From the histogram, can normality be assumed? Pick x = Ex: 0.1234 t = p = Round all answers to 4 decimal places. Since the p-value is Pick than the significance level 0.05, the null hypothesis Pick Pick evidence exists that the mean lifetime is less than 11,000 hours.