Concept explainers
Repeat Example 1 for the HDTV game matrix discussed at the beginning of this section:
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- If you were charged $8.00 to play this game, you, as the player, would on average see a [gain or loss] of [.50, .20, .10, 1.20] per spin.arrow_forward[6] – Statistics Scenario #1A dog enthusiast wanted to see if there was a difference in pit-bull ownership between people in Arcata and Eureka. They obtained a list of registered dog owners from the city of Eureka and the city of Arcata, then they randomly selected people from each list until they had 150 responses from Arcata and 150 responses from eureka. The total number of people from Arcata who reported having a pit-bull was 33. The total number from Eureka was 40 (c) Was the researchers sampling method biased, if so, what kind of bias?(d) Is the data qualitative, quantitative continuous, or quantitative discrete? e) What statistical test should be performed to test the hypothesis?arrow_forwardPart 1- Mutual Funds (Measures of Center and Spread, Boxplots) (Questions 1-7) The values of individual stocks in the stock market can vary wildly. For that reason, investors usually purchase more than one kind of stock to balance out their risk. Some people are comfortable choosing their own blend of stocks. Other people prefer to invest in pre-bundled combinations of individual stocks called mutual funds. In this portion of the project, you will look at two mutual funds, each identified by its stock exchange abbreviation: LEXCX (composed of 22 stocks) and DIA (composed of 30 stocks). LEXCX Mutual Fund The dataset on the left displays the stock symbol and dollar value of each of the 22 stocks in the LEXCX mutual fund on May 15, 2019. For your convenience, the stocks are numbered in the order of their ascending value on this day. 1. Use the dataset to complete the EXACT five-number summary of the # Stock Dollar Value dollar values of the LEXCX mutual fund. Do not round your results 1…arrow_forward
- see imagearrow_forwardPROBLEM IN MY STATS CLASS: Last spring we ran ads on social media for a soccer camp with our club. We spent $2,000 to get 10,000 ad views ($0.20 per ad view). From this advertising, 10 new customers (0.1% of ad views) clicked through and each paid $100 for our soccer camp. After the camp, one of those new customers (0.01% of ad views) paid $1,000 to join our club for the season. Create the probability distribution table for this situation. What is the expected value of an ad view? Interpret this expected value. What is the standard deviation? Interpret this standard deviation.arrow_forwardPractice question #1. Researchers at the University of Utah carried out a study to see if the size of the fork used to eat dinner influences how much food is consumed. The researchers assigned people to one of two groups. One group ate dinner using a small fork, and the other group ate using a large fork. The researchers found that thatthose who ate with a large fork ate less food on their plate than those who ate with a small fork. An articledescribing this study was called “Dieters Should Use a Big Fork”, implying cause-and-affect andgeneralizing this finding to the population of dieters. A. Under what circumstances would it be reasonable to conclude a cause-and-effect relationship between fork size and amount eaten? B. Under what circumstances would it be reasonable to generalize this finding to the population of dieters? Why is it often NOT appropriate to generalize the results of experiments to a wider population?arrow_forward
- Smokers make up 17% of the US population, while 10% of the US population is left handed. In a sample of 70 people, 12 are smokers and 7 are left handed. Only one participant is a left handed smoker. Does handedness appear to influence people to become smokers? Support your answer mathematically.arrow_forwardThe business problem facing the director of broadcasting operations for a television station was the issue of standby hours (i.e. hours in which unionized graphic artists at the station are paid but are not actually involved in any activity) and what factors were related to standby hours. A study of standby hours was conducted for 26 weeks. The variables in the study are described below and the data from the study are shown in the accompanying table. Complete parts a throughg below. Standby hours (Y)-Total number of standby hours in a week Total staff present (X,)-Weekly total of people-days Remote hours (X,)-Number of hours worked by employees off-site E Click the icon to view the data table. Standby hours a. State the multiple regression equation. Standby Hours (Y) Present (X,) Hours (X2) 247 Total Staff Remote Ý, =- 328.6 + (1.8) x, + (- 328.6)X (Round to one decimal place as needed.) 338 333 358 372 337 414 177 600 656 269 211 631 196 135 195 118 116 147 528 289 419 334 382 293 399…arrow_forwardThis item has three questions. The matrix represents the results (means) from a 2 x 2 factorial study. One mean is not given. A represents one factor and B represents the other factor. A1 A2 B1 40 20 B2 30 What value for the missing mean would result in no main effect for factor A? Explain. What value for the missing mean would result in no main effect for factor B? Explain. What value for the missing mean would result in no interaction?Explain.arrow_forward
- A friend who lives in Los Angeles makes frequent consulting trips to Washington, D.C.; 60% of the time she travels on airline # 1, 20% of the time on airline on airline # 3. For airline #1, flights are late into D.C. 40% of the time and late into L.A. 15% of the time. For airline #2, these percentages are 35% and 10%. If we learn that on a particular trip she arrived late at exactly one of the two destinations, and # 3? Assume that the chance of a late arrival in L.A. is unaffected by what happens on the flight to D.C. [Hint: second-generation branches labeled, respectively, 0 late, 1 late, and 2 late.] (Round your answers to four decimal airline #1 airline #2 airline #3 20% of the time whereas #2, and the remaining percentages for airline #3 the what are flown on airlines From the tip of each first-generation branch on a tree diagram, draw three places.) the posterior of having #1, #2, and 15%, probabilities are 35%arrow_forwardSolve plzzarrow_forwardPlease help!arrow_forward
- Elementary Geometry for College StudentsGeometryISBN:9781285195698Author:Daniel C. Alexander, Geralyn M. KoeberleinPublisher:Cengage Learning