Group4_ws3

Healthy Sleep Duration  The centers for Disease Control and Prevention, CDC, defines a healthy sleep duration to be at least seven hours per day. The CDC reports that the percentage of people who report a healthy sleep duration varies by marital status. The CDC also reports that in 2018, 67% of those who are married report a healthy sleep duration; 62% of those who have never been married report a healthy sleep duration; and 56% of those who are divorced, widowed, or separated report a healthy sleep duration. The file Sleep Habits contains sample data on the sleeping habits of people who have never been married that are consistent with the CDC’s findings. Use this data to answer the following questions.  Develop a point estimate and a 95% confidence interval for the proportion of those who have never been married who report a healthy sleep duration.  Develop a point estimate and a 95% confidence interval for the mean number of hours of sleep for those who have never been married.…

(Chapter 1 Section 1)The State Education Department requires local school districts to keep these records on all students: age, race or ethnicity, days absent, current grade level, standardized test scores in reading and mathematics, and any disabilities or special educational needs the student may have.Which of the following are categorical (or qualitative) variables in these records? Student Days Absent Race or Ethnicity Age Mathematics Test Score Reading Test Score Current Grade Level Disabilities or Special Needs

Can you please answer the question below, including all parts in a and b. Thank you.

Statistical Software Section Directions: Please use statistical software to make all the calculations. For parts a) – e) there will be no hand calculations. Please provide all statistical output with this section. 15) The following table gives the total 2004 payroll (on opening day of the season, rounded to the nearest million dollars) and the percentage of games won during the 2004 season by each of the American League teams. Total Payroll |(millions of $) Percentage Winning Team Angels 101 56.8 Orioles 52 48.1 Red Sox 127 60.5 White Sox 65 51.2 Indians 34 49.4 44.4 Tigers Royals 47 48 35.8 Twins 54 56.8 Yankees 184 62.3 Athletics Mariners Devil Rays Rangers Blue Jays 59 56.2 82 38.9 30 43.5 55 54.9 50 41.6 a. Calculate the sample correlation coefficient and interpret. b. Test at the 5% significance level whether there is a positive correlation between payroll and wining percentage for the American League teams. Please set-up the null and alternative hypothesis, state the p-value,…

Negotiating in trade means you are

Categorical binary , categorical ,  or quantataive

A bookstore at the Hartsfield-Jackson airport in Atlanta sells reading materials (paperback books, newspapers, magazines) as well as snacks (peanuts, pretzels, candy, etc.) A point-of-sale terminal collects a variety of information about customer purchases. The accompanying table shows the number of snack items and the number of items of reading material purchased by the most recent 600 customers.   Reading materials snacks 0 1 2 0 0 60 18 1 240 90 30 2 120 30 12 please solve parts 2, 3, and 4 Using the data in the table construct an empirical discrete bivariate probability distribution for x = number of snack items and y = number of reading materials for a randomly selected customer purchase. What is the probability of a customer purchase consisting of one item of reading materials and two snack items? What is the probability of a customer purchasing one snack item only? Why is the probability f(x=0, y=0)=0? Show the marginal probability distribution for the number of…

9th Grade            10th grade           11th grade                  12th grade     6                            10                         17                                15     9                            12                         8                                  16     6                            11                         11                                12     7                            11                         14                                12     7                            14                         15                                12   Calculate the degrees of freedom within group.

A bookstore at the Hartsfield-Jackson airport in Atlanta sells reading materials (paperback books, newspapers, magazines) as well as snacks (peanuts, pretzels, candy, etc.) A point-of-sale terminal collects a variety of information about customer purchases. The accompanying table shows the number of snack items and the number of items of reading material purchased by the most recent 600 customers.   Reading materials snacks 0 1 2 0 0 60 18 1 240 90 30 2 120 30 12   Using the data in the table construct an empirical discrete bivariate probability distribution for x = number of snack items and y = number of reading materials for a randomly selected customer purchase. What is the probability of a customer purchase consisting of one item of reading materials and two snack items? What is the probability of a customer purchasing one snack item only? Why is the probability f(x=0, y=0)=0? Show the marginal probability distribution for the number of snack items purchased. Compute…

PART B

2.6 Global credit cards. There are currently six global credit card companies that allow worldwide usage-Visa, Mastercard, American Express, UnionPay, JCB, and Discover. The table gives a breakdown on the number of purchase transactions for each company in 2018. GLOBALCC Credit Card Visa Mastercard American Express UnionPay JCB Discover Number of Worldwide Transactions (billions) 147.9 75.8 7.5 58.6 3.4 2.5 Source: The Nilson Report, January 2, 2020 a. One of the worldwide credit card transactions in 2018 is selected at random, and the credit card company is determined. What type of data (quantitative or qualita- tive) is measured? b. For each credit card company in the table, calculate the percentage of the 2018 worldwide transactions. c. Use the percentages from part b to construct a relative frequency bar graph for the data summarized in the table. d. Based on the bar graph, make a statement about the most used credit cards worldwide.