It is a one-directional or left-tailed test. ERROR: CORRECTED: 3. Newborn babies are more likely to be boys than girls. A random sample found 13.173 boys were born among 25,468 newborn children. The sample proportion of boys was 0.5172. Is this sample evidence that the birth of boys is more common than the birth of girls in the entire population? Ho : p = 0.5 Ha: p> 0.5 Zcom = 5.49 It is a non-directional or two-tailed test. ERROR: CORRECTED: . Traditionally, about 70% of students in a Statistics course at ECC are successful. If only 15 students in a class of 28 randomly selected students are successful, is there enough evidence at 5% level of significance to say that students of a particular instructor are successful at a rate of less than 70%? Ho : p= 0.70 Ha: p 0.10 Zcom = 1.645 ERROR: CORRECTED: 2. A sample of 100 students were randomly selected from Pinagpala High School and 18 of them said they are left-handed. Test the hypothesis that less than 20% of the students are left-handed by using a = 0.05 as the level of significance. H.: p = 0.20 Ha: p # 0.20. Zoom = 1.96 a = 0.05. 14 Co_Q4_ Statistics and Probability SHS Module 14 It is a one-directional or left-tailed test. ERROR: CORRECTED:Directions: Create a scatter plot based on the given data. Then, determine the form, trend, and variation of the scatter plot. Age 12 14 15 16 18 19 20 23 24 25 Weight 40 49 52 55 50 58 (in kg) 20 Father's height (cm) 166 170 158 178 162 156 175 180 175 183 Son's height 160 162 150 165 157 156 170 (cm) 175 172 180 105 180 175 170 Father's Height 165 160 185 150 145 150 155 140 165 170 175 180 185 son's height