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. In a certain senior high school, a study fou 1,100 Grade 12 students use smartphones. is there enough evidence to conclude tha students who are using smartphones is diffe is the appropriate alternative hypothesis? A. Ha: p > .25 В. На р<.25 С. На р-.2 D. Ha: p+ .- . In problem no. 10, what type of test is used?

. In a certain senior high school, a study fou 1,100 Grade 12 students use smartphones. is there enough evidence to conclude tha students who are using smartphones is diffe is the appropriate alternative hypothesis? A. Ha: p > .25 В. На р<.25 С. На р-.2 D. Ha: p+ .- . In problem no. 10, what type of test is used?

A First Course in Probability (10th Edition)
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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10. In a certain senior high school, a study found that 972 out that 1,100 Grade 12 students use smartphones. Using a = 0.10 level, is there enough evidence to conclude that the percentage of students who are using smartphones is different from 25%? What is the appropriate alternative hypothesis? А. Ha: p > .25 С. На р%3.25 В. Ha: p< .25 D. Ha: p + .25 11. In problem no. 10, what type of test is used? C. one-tailed test А. directional B. one-sided test D. non-directional 12. The president of a certain food chain claims that 70% of his 20,000 customers are very satisfied with the service they receive. In order to test the claim, a survey was conducted among 100 customers randomly chosen. Among them, 90% said that they are satisfied. Is there enough evidence to say that 70% of the customers are satisfied at 0.05 level of significance? Formulate the null hypothesis. A. Ho: p+ 0.70 В. Но: р- 0.70 С. Н.: р<0.70 D. Ho: р> 0.70 13. In problem no. 12, what is its alternative hypothesis? С. На: р 3 0.70 D. Ha: р> 0.7о Ha: p + 0.70 В. Ha: p < 0.70 А. 14. Suppose a TV network claims that at least 6% of their 15,000 employees are living in a condominium unit in the city. A survey was conducted randomly among 500 employees. Assume a significance level of 0.05. What is the appropriate alternative hypothesis of this study? С. На: р < 0. 06 D. Ho: р-D 0. 06 A. Ha: p+ 0.06 В. На: р» 0. 06 15. In problem no. 14, what specific type of test is applied? A. directional C. one-tailed test B. left-tailed test D. non-directional
Transcribed Image Text:10. In a certain senior high school, a study found that 972 out that 1,100 Grade 12 students use smartphones. Using a = 0.10 level, is there enough evidence to conclude that the percentage of students who are using smartphones is different from 25%? What is the appropriate alternative hypothesis? А. Ha: p > .25 С. На р%3.25 В. Ha: p< .25 D. Ha: p + .25 11. In problem no. 10, what type of test is used? C. one-tailed test А. directional B. one-sided test D. non-directional 12. The president of a certain food chain claims that 70% of his 20,000 customers are very satisfied with the service they receive. In order to test the claim, a survey was conducted among 100 customers randomly chosen. Among them, 90% said that they are satisfied. Is there enough evidence to say that 70% of the customers are satisfied at 0.05 level of significance? Formulate the null hypothesis. A. Ho: p+ 0.70 В. Но: р- 0.70 С. Н.: р<0.70 D. Ho: р> 0.70 13. In problem no. 12, what is its alternative hypothesis? С. На: р 3 0.70 D. Ha: р> 0.7о Ha: p + 0.70 В. Ha: p < 0.70 А. 14. Suppose a TV network claims that at least 6% of their 15,000 employees are living in a condominium unit in the city. A survey was conducted randomly among 500 employees. Assume a significance level of 0.05. What is the appropriate alternative hypothesis of this study? С. На: р < 0. 06 D. Ho: р-D 0. 06 A. Ha: p+ 0.06 В. На: р» 0. 06 15. In problem no. 14, what specific type of test is applied? A. directional C. one-tailed test B. left-tailed test D. non-directional
6. Before the opening of classes, parents were asked to answer a survey. Those in favor of alternative learning mode were 1,900 out of 5,000 randomly selected parents. Using a = 0.10 level, is there enough evidence to conclude that the percentage of parents who are in favor of alternative learning mode is less than 38%? What is the appropriate alternative hypothesis? А. На: р».38 С. На: р<.38 В. Ha: p = .38 D. Ha: р*.38 7. In problem no. 6, formulate the correct null hypothesis. A. The proportion of parents who are in favor of alternative learning mode is 38%. B. The proportion of parents who are in favor of alternative learning mode is not equal to 38%. C. The proportion of parents who are in favor of alternative learning mode has increased by 38%. D. The proportion of parents who are in favor of alternative learning mode is more than 38%. 8. A survey conducted last year by certain barangay officials showed that 40% of the residents owned a private car. This year a new survey is conducted on 375 residents selected randomly from the same barangay. It was found out that 190 of them own a car. Test if the claim is fewer at a = 0.01 level. Formulate the appropriate null hypothesis. Но: р%3.40 А. С. Но: р<.40 В. Ha: p = .40 D. Ha: р<.40 9. In problem #8, what is the correct alternative hypothesis in sentence form? A. The proportion of residents who owned a private car is 40%. B. The proportion of residents who owned a private car is higher than 40%. C. The proportion of residents who owned a private car has changed to 40%. D. The proportion of residents who owned a private car is fewer than 40%.
Transcribed Image Text:6. Before the opening of classes, parents were asked to answer a survey. Those in favor of alternative learning mode were 1,900 out of 5,000 randomly selected parents. Using a = 0.10 level, is there enough evidence to conclude that the percentage of parents who are in favor of alternative learning mode is less than 38%? What is the appropriate alternative hypothesis? А. На: р».38 С. На: р<.38 В. Ha: p = .38 D. Ha: р*.38 7. In problem no. 6, formulate the correct null hypothesis. A. The proportion of parents who are in favor of alternative learning mode is 38%. B. The proportion of parents who are in favor of alternative learning mode is not equal to 38%. C. The proportion of parents who are in favor of alternative learning mode has increased by 38%. D. The proportion of parents who are in favor of alternative learning mode is more than 38%. 8. A survey conducted last year by certain barangay officials showed that 40% of the residents owned a private car. This year a new survey is conducted on 375 residents selected randomly from the same barangay. It was found out that 190 of them own a car. Test if the claim is fewer at a = 0.01 level. Formulate the appropriate null hypothesis. Но: р%3.40 А. С. Но: р<.40 В. Ha: p = .40 D. Ha: р<.40 9. In problem #8, what is the correct alternative hypothesis in sentence form? A. The proportion of residents who owned a private car is 40%. B. The proportion of residents who owned a private car is higher than 40%. C. The proportion of residents who owned a private car has changed to 40%. D. The proportion of residents who owned a private car is fewer than 40%.
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