Question 21 2 Points Read the two statements carefully and identify if true or false. Statement A: An estimator of a parameter is said to be unbiased if the mean of its estimate distribution is equal to the true value of the parameter. Statement B: The sample mean and the sample standard deviation are considered as "estimates" to the sample statistics. A Both the first and the second statements are TRUE. B The first statement is TRUE but the second statement is FALSE. The first statement is FALSE but the second statement is TRUE. D Both the first and the second statements are FALSE.Question 22 2 Points A researcher did a pilot sample of 25 individuals with a population standard deviation of 0.40. How many more must he survey to develop a 95% confidence interval that has 0.03 margin of error? (Note: Round - up your answer into whole number) A 600 B 575 658 D 400Question 23 2 Points Which of the following does not call for the use of the Student's t-distribution, A n aQuestion 25 2 Points In an article issued by a nutrition magazine, the recommended Vitamin C intake per day for Filipino female adolescents ages 14 to 18 years old is 75 grams. A researcher conducted a survey in Baguio City and selected 25 respondents and measured their daily Vitamin C intakes. If the group consumed an average of 81 grams per day with a standard deviation of 10 grams per day, is it valid to conclude at 0.05 level of significance, that the female adolescent of this age group from this City consume more than Vitamin C per day than the recommended consumption? Determine the test distribution to use, and the type of test. I A t-distribution / right tailed test B z-test / right tailed test C two-tailed test D t -distribution / left tailed test Questions Filter (35)