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Activity . Fill Me! Directions: Determine what is asked in each problem as indicated by the blanks. 1. The Bureau of Internal Revenue claims that the mean wait time for taxpayer during a recent tax filing is at most 8.7 minutes. A random sample of 11 taxpayers has a mean wait time of 8.7 minutes and a standard deviation of 2.7 minutes. Is there enough evidence to reject the claim at a significance level of 0.10? Parameter: mean Null Hypothesis Claim: Alternative Hypothesis : Ha: 1>8.7 2. According to a company, the mean pl level of the river water is 7.4. A researcher randomly selected 15 river water samples and found out that the mean is 6.7 with standard deviation of 0.24. Parameter: mean Null Hypothesis Claim: mean pH level of Alternative Hypothesis the water river is 7.4Activity . Let's Hypothesize Directions: Write the null hypothesis and alternative hypothesis in notations for each given situation. 1. A bus company in Manila claims that the mean waiting time for a bus during rush hour is less than 12 minutes. A random sample of 30 waiting times has a mean of 15 minutes with a standard deviation of 4.8 minutes Ho: Ha: 2. The average power consumption of air conditioner is at most 2,700 watts as claimed by the owner. A survey made by an electric power company found out that the mean consumption is 3,000 with standard deviation of 225. Ho: Ha:Activity . OneTailed n: TinTailed! Directions: Identify whether the given hypothesis is onetailed or twotailed. l. 1Write ONE if it is onetailed and TWO if it is twotailed test. The mean age of students in a university in the previous years was 2'? years old. n instructor thinks the mean age for students is older than 2?. She randomly surveys 55 students and nds that the sample mean is 2'3 with a standard deviation of 2. The mean work week for eng'neers in a new oompan'ur\"r is believed to be about 413 hours. A newly hired engineer hopes that it is shorter. She asks l engineering friends for the lengths of their mean work weeks. Based on the results, should she oount on the mean work week to be shorter than 40 hours