Group4_ws4

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.…

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

Determine the interval(s) BH Which the function is constant. Write your answer as an interval or list of intervals. When writing a list of intervals, make sure to separate each interval with a comma and to use as few intervals as possible. Click on "None" if applicable.

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,…

(Devore: Section 2.3 #41) An ATM personal identification number (PIN) consists of four digits, each a 0, 1, 2, ..., 8 or 9, in succession. (a) How many different possible PINs are there if there are no restrictions on the choice of digits? (b) According to a representative at the author's local branch of Chase Bank, there are in fact restrictions on the choice of digits. The following choices are prohibited: (i) all four digits identical (ii) sequences of consecutive ascending or descending digits, such as 6543 (iii) any sequence starting with 19 (birth years are too easy to guess). So if one of the PINs in (a) is randomly selected, what is the probability that it will be a legitimate PIN (that is, not be one of the prohibited sequences)? (c) Someone has stolen an ATM card and knows that the first and last digits of the PIN are 8 and 1, respectively. He has three tries before the card is retained by the ATM (but does not realize that). So he randomly selects the 2nd and 3rd digits for…

Sammy Davi... Duncan Toys... Launch Meet... Louis Vuitto. Performance Matters The history... Welcome, Demario Hudson! X Performane Connection Status: Good O All changes saved Question 2 of 17 - ? r 20-21_AA_Fall_Grade 10 Academic Approach: Section 3 - Math Test – No Calculator - 25 MINUTES, 17 QUESTIONS Submit Test Question: 3-2 Tim is attending a taco festival that charges $10 for admission and $3 for each taco. Which of the following equations gives the number of tacos Tim bought, x, if he spent $34 at the festival? 3(10 + x) = 34 O 3x + 10 = 34 10x + 3 = 34 13x = 34 Next Previous

...... ................ ........... Before 1918, approximately 55% of the wolves in a region were male, and 45% were female. However, cattle ranchers in this area have made a determined effort to exterminate wolves. From 1918 to the present, approximately 65% of wolves in the region are male, and 35% are female. Biologists suspect that male wolves are more likely than females to return to an area where the population has been greatly reduced. (Round your answers to three decimal places.) n USE SALT (a) Before 1918, in a random sample of 10 wolves spotted in the region, what is the probability that 7 or more were male? What is the probability that 7 or more were fertale? What is the probability that fewer than 4 were female? (b) For the period from 1918 to the present, in a random sample of 10 wolves spotted in the region, what is the probability that 7 or more were male? What is the probability that 7 or more were female? What is the probability that fewer than 4 were female? Need…

A quasi-independent variable is most similar to and consistent with which of the following terms? A. control group B. manipulation C. Non-equivalent groups research study D. pre-post research study

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…

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.

Subject:Practical research 2