Subject: Math

Topic: Null and alternative hypothesis

****

For numbers 11-15, determine whether the test is one-tailed or two-tailed. 1 1. A researcher claims that the method of teaching affects learning. 12. A sample of 100 individuals was selected at random from a certain population and 18 of them are left-handed 13. A teacher wants to know if listening to popular music affects the performance of pupils 14. A study habit improves memory. 15. A food additive enhances food flavor. For numbers 16-20, determine whether the following hypothesis testing is a Type I or Type II error. 16. Maria insists that she is 30 years old when in fact she is 32 years old. 17. Stephen says that he is not bald, his hair line is just receding. 18. A man plans to go hunting the Philippine monkey-eating eagle, believing that it is a proof of his mettle. 19. What type of error is committed when you reject a null hypothesis when in fact it is true? 20. Suppose it is Christmas season and Janine thinks that it is the month of January, what error is she committing? II. PERFORMANCE TASK: Formulate a null and alternative hypothesis for the following problems. Tell whether it is one-tailed or two-tailed. 1. The owner of a factory that sells a particular bottled fruit juice claims that the average capacity of a bottle of their product is 250 ml. 2. John believes that using organic fertilizers on his plants will yield greater income. His average income from the past was Php 200,000 per year