ACTIVITY 1: STATING THE NULL AND ALTERNATIVE HYPHOTHESIS Directions: State the null (Ho) and alternative (Ha) for each of the following problems or situations. Determine the type of the alternative hypothesis formulated. 1. A researcher hypothesizes that present average weight of male patients is not the same as the previous years. 2. A pharmaceutical company claims that only 2% of those who take their medicines will experience some side effects. A researcher believes that the proportion of those who took their medicines and experienced some side effects is higher than what is claimed 3. The average age of unemployed persons has changed and is no longer equal to 30.5 years old. 4. The packaging of a certain light bulb states the bulb will last for 8000 hours under normal use. A consumer suspects that the average life is lower than 8000 hours. 5. There is no difference between the average IQ of students enrolled in public and private schools. ACTIVITY 2: TYPE I AND TYPE II ERRORS Refer to the problems/situations given in Activity 1 and to the null and alternative hypotheses that you formulated. Identify/Characterize situations when Type I and Type II errors are committed in each problem 1. A researcher hypothesizes that present average weight of male patients is not the same as the previous years. 2. A pharmaceutical company claims that only 2% of those who take their medicines will experience some side effects. A researcher believes that the proportion of those who took their medicines and experienced some side effects is higher than what is claimed. 3. The average age of unemployed persons has changed and is no longer equal to 30.5 years old. 4. The packaging of a certain light bulb states the bulb will last for 8000 hours under normal use. A consumer suspects that the average life is lower than 8000 hours. 5. There is no difference between the average IQ of students enrolled in public and private schools.1.. Denoted by alpha to} 4. A test where the alternative hypothesis does not specify a directional difference for the parameter of interest. 6. Denoted by Ha and considered as the research hypothesis. 9. The probability of committing a Type II error. 10. Consists of values that su pport the alternative hypothesis and leads to the rejection of the null hypothesis. 2. Calculated from the sample data, which will be the basis for deciding whether to reject Ho or not in a test of hypothesis. 3. the mathematical symbol used for non- directional alternative hypothesis 5. A subset of the population. ?. The decision to the null hypothesis or not is based on the information provided by the sample, 3. The probability of committing a Type I error