rect hia needs to restock the paper and ink for the printers in her office. She wants to make sure that she has enough money before going to the office supply store. If heeds to buy 6 reams of paper at $3.79 per ream and 9 ink cartridges at $48.50 per cartridge, estimate the amount of money Virginia will need to purchase the er and ink needed. wer to enter your answer Keypad Keyboard Shortcuts
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- Which model—the one for parliaments or the one for ministries (or cabinets)—presented in the article has the greater explanatory power? How can you tell?Refer to the research analysis output below. Which statement is TRUE? Group of answer choices a. A total of 44 data were analyzed b. Both alpha and beta errors may have been committed c. More data should be collected d. A beta error may have been committed e. An alpha error may have been committedONLY ANSWER D,E,F AND G The article “Well-Fed Crickets Bowl Maidens Over” (Nature Science Update, February 11, 1999) reported that female field crickets are attracted to males with high chirp rates and hypothesized that chirp rate is related to nutritional status. The usual chirp rate for male field crickets was reported to vary around a mean of 60 chirps per second. To investigate whether the chirp rate was related to nutritional status, investigators fed 26 male crickets a high protein diet for 8 days, after which chirp rate was measured. Let: The parameter μ be the mean chirp rateof male crickets on a high protein diet for 8 days. Given: The mean chirp rate for the random sample of crickets on the high protein diet was reported to be 64.04 chirps per second with a standard deviation of 10. Research Question: Is there convincing evidence that the mean chirp rate for crickets on a high protein diet implies an advantage in attracting the ladies? It is known that the…
- Ariatnam, Najafi and Morones ( Journal of Professional Issues in Engineering Education and Practice, 2002) describe an everview of academies on horizontal directional drilling conducted to train engineers and inspectors for the California Department of Transportation. A pretest was administered on the first day prior to any instruction. Instruction and field experience were provided over a 3-day period, followed by a final test administered at the end of the last day. Although the average final test score of 75.27% was higher than the average pretest score of 55.61%, the difference was not significant. Identify the type of study described here. What is the purpose of administering a pretest?A group of 11 students was selected at random and asked for their high school GPA and their freshmen GPA in college the subsequent year. The results were: Student High School GPA Freshmen GPA 1 2.0 1.6 2 2.2 2.0 3 2.6 1.8 4 2.7 2.8 5 2.8 2.1 6 3.1 2.0 7 2.9 2.6 8 3.2 2.2 9 3.3 2.6 10 3.6 3.0 We would like to know whether there is a linear relationship between the high school GPA and the college freshmen GPA, and we would like to be able to predict the freshmen GPA, if we know that the high school GPA of another student is, say, 3.4. Provide the two requested scatter plots for this data (put college freshman GPA on the Y (vertical) axis!). a) What would be your approximate 95% prediction interval for question (g)? b) Show your scatterplot with the predicted trend line belowA neighborhood is trying to set up school carpools, but they need to determine the number of students who need to travel to the elementary school (ages 5–10), the middle school (ages 11–13), and the high school (ages 14–18). A histogram summarizes their findings: Histogram titled Carpool, with Number of Children on the y axis and Age Groups on the x axis. Bar 1 is 5 to 10 years old and has a value of 3. Bar 2 is 11 to 13 years old and has a value of 7. Bar 3 is 14 to 18 years old and has a value of 4. Which of the following data sets is represented in the histogram? A. {3, 3, 3, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4} B. {5, 10, 4, 11, 12, 13, 12, 13, 12, 11, 14, 14, 19, 18} C. {5, 6, 5, 11, 12, 13, 12, 13, 14, 15, 11, 18, 17, 13} D. {3, 5, 10, 11, 13, 7, 18, 14, 4}
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- Stephens, Atkins, and Kingston (2009) conducteda research study demonstrating that swearing canhelp reduce pain. In the study, each participant wasasked to plunge a hand into icy water and keep itthere as long as the pain would allow. In one condition, the participants repeatedly yelled their favoritecurse words while their hands were in the water. Inthe other condition, the participants repeated a neutral word. Data similar to the results obtained in thestudy are shown in the following table. Does it appear that swearing helped with pain tolerance? Perform a hypothesis test. Amount of Time (in seconds)Participant Swear Words Neutral Words1 94 592 70 613 52 474 83 605 46…In a study, the effects of the mane of a male lion as a signal of quality to mates and rivals was explored. Four life-sized dummies of male lions provided a tool for testing female response to the unfamiliar lions whose manes varied by length (long or short) and color (blonde or dark). The female lions were observed to see whether they approached each of the four life-sized dummies. Complete parts (a) through (e) below. a. Identify the experimental units. Choose the correct answer below. The female lions The male dummies The mane colors The mane lengths Part 2 b. Identify the response variable. Choose the correct answer below. A. Whether or not (yes or no) the mane length affected how the female lions reacted to a male dummy. B. Whether or not (yes or no) the female lions approached the same dummies. C. Whether or not (yes or no) the female lions approached a male dummy. D. Whether or not…Given if X, then Y. If Y, then Z. Indicate what is known for the given data: Y is true. X is ? Z is ?