Overall Lesson is all about Estimation of Parameters

1: t-Distribution

ACTIVITY TIME DIRECTIONS: Express the null hypothesis H. and the alternative hypothesis Ha in notation form in the following scenarios. Write your answer the space provided. The first one is already done for you. SCENARIO NULL HYPOTHESIS ALTERNATIVE HYPOTHESIS H. Ha 1. The principal of the school claims that the mean age of the teachers is 45 years. The mean age of the randomly selected 35 teachers is Ho: H = 45 Ha = u # 45 42 years, which is not equal to what is claimed by the principal. 2. The Mathematics teacher claims that the mean IQ of Statistics is 110. The mean IQ of the 32 randomly selected Statistic students is 112 which is more than what the Mathematics teacher claims. 3. It is claimed that the percentage of viewers tuned to Channel 7's new sitcom is 30%. Out of the 250 viewers randomly selected, only 29% are tuned to Channel 7's new sitcom. Can it be concluded that the percentage of viewers tuned to Channel 7's new sitcom is less than 30%? 4. The mean annual income of workers who are college graduates is greater than P100, 000 a year. 5. The percentage of women who watches sports on TV is not 40% as claimed by a researcher.Directions: Find the following t - values in the t - Critical Values. Write your answer on the space provided. The first one is already done for you. GIVEN ONE TAIL TWO TAILS 1. toos for df = 8 1.860 2.306 2. to.ozs for df = 15 3. to10 for df = 12 4. tool for df = 20 5. toozs for df = 9ACTIVITY TIME Directions: Find the length of the following confidence interval. Write your answer on space provided. The first one is already done for you. GIVEN LENGTH OF CONFIDENCE INTERVAL (LCI) 1. 0.325