Essay Question Instructions: Make sure you show all work on the five essay questions on scratch paper. Upload a PDF of your written work to the Canvas Upload module immediately after you finish the test. Most of the points are awarded based on your written work, not the final answer that you submit to each question. Essay Question 1: According to a 2017 survey, Millennial males in the US were more likely to own a cat then their female counterparts. 48% of the male Millennial survey respondents stated that they owned a cat, compared to 35% of the females who responded. Suppose a SRS survey of 255 Millennial males was conducted last year and found that 143 said they were cat owners. Using a significance level of .05, is there significant evidence to claim that the proportion of male Millennial cat owners in the US is different than 48%? Be sure to include the following: 1. State an appropriate null and alternative hypotheses. 2. Find a test statistic. Show all your work- formula used and answer. 3. Find the P-value. 4. Make a conclusion. 5. Write one to two sentences explaining what your test found in the context of the problem using non statistical language. Your audience is people who had never had a statistic class.    

The number of students enrolled at the University of Arizona is approximately 45,000, while the number at the University of New Mexico is approximately 27,000.  At both schools, a simple random sample of about 3% of the undergraduates is taken. Which of these two schools will have more sampling variability in its sample?

Suppose I wanted to determine if there is a relationship between the number of absences from my class and a student’s GPA. After collecting several semester’s worth of data, I notice that students who miss more classes tend to have a lower GPA.  In a scatterplot of days missed and GPA, what would be the response variable and what type association would you expect to see?

Suppose you have a small simple random sample (assume 13 observations), the standard deviation of the population is unknown, and the histogram of your data shows obvious skewness. Which of the following is true?

Select all the statements that are False.

Essay Question Instructions: Make sure you show all work on the five essay questions on scratch paper. Upload a PDF of your written work to the Canvas Upload module immediately after you finish the test. Most of the points are awarded based on your written work, not the final answer that you submit to each question. Essay Question 2: The PLNU is trying to determine if basketball players weigh more that baseball players.  A random sample was taken of  43 basketball players and their mean weight was 196 lbs with a standard deviation of 21.4 lbs.  A random sample of  59 baseball players was taken and their mean weight was 187 lbs with a standard deviation of 16.8 lbs.  Give a 95% confidence interval for the mean difference in the average weights of PLNU basketball and baseball players. Be sure to show all formulas, work and numbers used ( e.g. df & critical value) .  At the end of your work, write a one or two sentence summary in non-statistical language to describe what you have found, not how you found it. Your audience is people who have never had a statistics class. The PLNU is trying to determine if basketball players weigh more than baseball players.  A random sample was taken of  53 basketball players and their mean weight was 196 lbs with a standard deviation of 21.4 lbs.  A random sample of  62 baseball players was taken and their mean weight was 187 lbs with a standard deviation of 18.3 lbs.  Give a 95% confidence interval for the mean difference in the average weights of PLNU basketball and baseball players. Be sure to show all formulas, work and numbers used ( e.g. df & critical value) .  At the end of your work, write a one or two sentence summary in non-statistical language to describe what you have found, not how you found it. Your audience is people who have never had a statistics class.    

Given the following two relations R and S as Sets with the following records   Perform a cartesian product operation between R and S.  You have to show the final resulting relation here on canvas. Scratch papers will be collected and discarded after the exam. 

A large software company gives its applicants a test in programming ability.  In the past the mean score was 150.1.  This year a random sample of 25 applicants was taken and their scores had a mean of 157.1 and a standard deviation of 16.3.   At the significance level of

A supplier of digital memory cards claims that less than 1% of its cards are defective.   A customer took a random sample of 200 cards and found that 3 were defective.  What is the proper hypotheses to test the customer’s claim that the rate is higher?

Which of the following tectonic settings is the most likely to generate an explosive volcanic eruption?