A sample of students from the University of Florida was surveyed on a variety of topics. The variable of interest for now is • life_after_death (whether the student believes in life after death: y = yes, n = no, u =unsure)
1. There are three possible responses for whether students believe in life after death. What are the null and alternative hypotheses for testing whether students believe in an afterlife at a rate greater than chance
2. What are the assumptions required for testing the hypotheses in (1)? Have they been satisfied? Justify
1) Null Hypothesis- The proportion of students whose responses for the question- Do they believe in life after death Yes, No and Unsure are same that is responses are given by chance
Alternative Hypothesis - Proportion of students whose responses are Yes, No and Unsure are not same that is responses are not given by chance
3.) Sample should be large.
The responses of each student is independent of the other responses
The sample should be selected randomly
A sample of students from the University of Florida was surveyed on a variety of topics....
A sample of students from the University of Florida was surveyed on a variety of topics. The variable of interest for now is • life_after_death (whether the student believes in life after death: y = yes, n = no, u =unsure) 1. There are three possible responses for whether students believe in life after death. What are the null and alternative hypotheses for testing whether students believe in an afterlife at a rate greater than chance 2. What are the...
7. A survey of first-year and second-year students at a large university asked if students were satisfied with college life. We are interested in whether there is a difference between first and second-year students with respect to this question. You performed a hypothesis test and found there was no evidence of a difference between first and second-year students in response to this question. You based th on a test using alpha -0.01. Would you have made the same decision at...
A private university is considering how it should best go about recovering the outstanding tuition balances owed by students who leave the school. There are currently 100 students who left the school this quarter who owe an average of $6000 each to the university. The school has several options for how it can go about recouping the amount that these former students owe. First, it can immediately sell these debts to a third-party collections agency for 50 cents on the...
1. A university researcher is interested in whether efforts to recruit more top high school students have been successful. To test this, she randomly selects 50 freshmen from the university and records their high school GPA. The mean is 2.75 with a standard deviation of 0.50. The researcher also knows that the mean high school GPA of all freshmen enrolled at the university five years ago was 3.00 with a standard deviation of 0.66. The researcher wants to know if...
Data concerning employment status were collected from a sample of 100 World Campus students at the beginning of the Fall 2018 semester. In that sample of 100, 67 were employed full-time. We want use these data to construct a 95% confidence interval to estimate the proportion of all World Campus students who are employed full-time. Is it appropriate to use the normal approximation method? Show all your work involved with checking these assumptions. Use Minitab Express to construct a 95%...
An accounting class of 250 students is allocated into several tutorials to be taken by either Tutor A and Tutor B. At the end of the semester the lecturer-in-charge looks at the distribution of marks by tutor. Table 1 provides this summary of the marks Table 1: Accounting student results according to their tutor Fail Credit Distinction Higher distinction 1 4 Pass Total Tutor A Tutor B Total 13 12 25 59 71 130 26 39 65 6 19 25...
Part (V) to (Viii)
An accounting class of 250 students is allocated into several tutorials to be taken by either Tutor A and Tutor B. At the end of the semester the lecturer-in-charge looks at the distribution of marks by tutor. Table 1 provides this summary of the marks Table 1: Accounting student results according to their tutor Fail Credit Distinction Higher distinction 1 4 Pass Total Tutor A Tutor B Total 13 12 25 59 71 130 26 39...
A random sample of university students were asked whether they participate in varsity athletics and how many times they had used marijuana in the last ten days. If the necessary conditions are met, which of the following methods would be most appropriate to test for an association between the whether or not a student participates in varsity athletics and the frequency of marijuana use? A) One sample t-test B) Paired t-test C) Two sample t-test for difference in means D)...
Bang the Drum slowly questions 1. Bruce and Katie want Henry to do something, but he is reluctant. What is Henry reluctant to do? a. Loan Katie and Bruce money to furnish an apartment. b. Change the beneficiary for Bruce's life insurance policy. c. Ask Dutch not to trade Bruce. d. Get Bruce a guest spot on a television show. 2. What is the sex of Henry and Holly's baby? a. Boy b. Undetermined c. Girl d. The novel does...
Radioactive fallout from testing atomic bombs drifted across a region. There were 220 people in the region at the time and 42 of them eventually died of cancer. Cancer experts estimate that one would expect only about 28 cancer deaths in a group this size. Assume the sample is a typical group of people. a) Is the death rate observed in the group unusually high? b) Does this prove that exposure to radiation increases the risk of cancer? Are the...