Ha: M

< 50 Test value - -2.24 Critical value - -1.96 Summary Key Of Ideas Reject Ho 1. 2. 3. 4. A hypothesis is a tentative statement or explanation Of a phenomenon. It is a conjecture Or assertion about a parameter. A null hypothesis is a Statement that there exists a difference between a parameter and a specific value. An altemative hypothesis is a statement that there exists a difference between a parameter and a specific value. If the alternative hypothesis is expressed, using "not equal to" symbol if then the test is two-tailed or nondirectional. Aeiiviiy I: Null Alternative 5 Directions. A. Identify whether the following is a null hypothesis Or an alternative hypothesis. 1. 2. 3. 4. 5. The average age of grade eleven students is 17 years old. The mean Content Of citric acid On a bottle Of juice drinks is greater than 2 The average monthly salary Of private school teachers is less than P16 000. The mean weight of newborn babies is 0.5 kg. The average IQ of grade eleven students is less than 108. B. For each Of the following conjecture, state the null (Ho) and the alternative hypotheses (Ha). 1. 2. 3. 4. 5. The average time to commute from home to school is 35.9 minutes. The average number of vehicles passing through NLEX daily is less than 21 000. The average daily number of customers in a convenient store is less than 1 025. The mean content of citric acid in a bottle of juice drinks is greater than 2ml. The average typing speed of a secretary is 23.8 words per minute. 6 Activity 3: Accept or Reject? Direct 1. 2. 3. 4. 1. 2. 3. 4. 5. 6. 8. 9. Directions. Decide whether the null hypothesis is to be rejected or accepted, given the test value and critical value Of test statistic.