Wasp Hierarchical Status. In an issue of Discover (Vol. 26, No. 2, pp. 10–11), J. Netting described the research of E. Tibbetts of the University of Arizona in the article, “The Kind of Face Only a Wasp Could Trust.” Tibbetts found that wasps signal their strength and status with the number of black splotches on their yellow faces, with more splotches denoting higher status. Tibbetts decided to see if she could cheat the system. She painted some of the insects’ faces to make their status appear higher or lower than it really was. She then placed the painted wasps with a group of female wasps to see if painting the faces altered their hierarchical status. Was this investigation an observational study or a designed experiment? Justify your answer.
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Introductory Statistics (10th Edition)
- A drug trial had 231 participants. A survey was done to gather information about the participants' experiences with side effects. The table below gives the results for two possible side effects. Number of participants Had anxiety (75) Had nausea (184) Had both anxiety and nausea (56) Construct a Venn diagram illustrating these results. Then answer the questions. How many participants had nausea but not anxiety? How many participants had anxiety or nausea (or both)?arrow_forwardA researcher is interested in examining whether the location that a person lives is related to the number of hours that they spend on the internet each week. The researcher collected data from a sample of 30 participants who were classified in one of three groups: (1) 10 people who live in an urban setting, (2) 10 people who live in a suburban setting, and (3) 10 people who live in a rural setting. Each participant reported the number of hours they spend on the internet in a typical week (the dependent variable). The researcher found the following descriptive statistics: Urban participants reported an average of 8.9 hours of internet use per week with a standard deviation of 2.77. Suburban participants reported an average of 12.7 hours of internet use per week with a standard deviation of 4.88. Rural participants reported an average of 9.8 hours of internet use per week with a standard deviation of 2.82. Using the data that was collected, the researcher found the following: The…arrow_forwardA drug trial had 244 participants. A survey was done to gather information about the participants' experiences with side effects. The table below gives the results for two possible side effects. Number of participants Had nausea 173 Had drowsiness 65 Had both nausea and drowsiness 48 Construct a Venn diagram illustrating these results. Then answer the questions. All participants in the survey How many participants had nausea but not drowsiness? participants How many participants had nausea or drowsiness (or both)? Had nausea Had drowsiness participants ? Oloo OOarrow_forward
- .1 A survey based on 152 employees in the Public Sector, relating to their preferred automobile brand revealed the following: 98 employees prefer LEXUS; 85 prefer AMAROK; and 65 prefer MERCEDES; 40 of them prefer AMAROK and MERCEDES; 42 prefer LEXUS and MERCEDES; 25 prefer AMAROK only; 18 prefer MERCEDES only. Draw a Venn diagram to illustrate this information. a) How many preferred AMAROK and LEXUS but not MERCEDES? b) How many preferred AMAROK or LEXUS but not MERCEDES? c) How many preferred LEXUS only? d) How many preferred all three brands?arrow_forwardIn 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…arrow_forwardQuestion Help 8.2.19-BE The human resources director for a commercial real estate company received the following numbers of applications from people with the information given to the right. Use a Venn diagram to answer parts (a) through (d). 60 with sales experience 41 with a college degree 25 with a real estate license 27 with sales experience and a college degree (a) How many applicants were there? 14 with sales experience and a real estate license 17 with a college degree and a real estate license 11 with sales experience, a college degree, and a real estate license 26 with neither sales experience, a college degree, nor a real estate license applicants Enter your answer in the answer box and then click Check Answer. 3 parts remainina Clear All Check Answerarrow_forward
- A drug trial had 241 participants. A survey was done to gather information about the participants' experiences with side effects. The table below gives the results for two possible side effects. Number of participants Had drowsiness 182 Had nausea 66 Had both drowsiness and nausea 39 Construct a Venn diagram illustrating these results. Then answer the questions. How many participants had drowsiness but not nausea? All participants in the survey participants How many participants had drowsiness or nausea (or both)? Had drowsiness Had nausea participants 143 W MAYarrow_forwardA please. Scatter diagram included.arrow_forwardQ1; a. Explain the role of Venn-Diagram in science, engineering, medical and management sciences. b. In a survey of 500 college students, the percentages of the students watching live three games are the following: 49 % liked live watching football 53 % liked live watching hockey 62 % liked live watching basketball 27 % liked live watching football and hockey both 29 % liked live watching basketball and hockey both 28 % liked live watching football and basketball both 5 % did not like live watching none of these three games Depict the percentage of the students watching live games on the Venn-Diagram, when: A: stands for Football, B: stands for Hockey C: stands for Basketball Use this model to find the percentage of the students liked watching live all the three games. Engineering Subject= Applied…arrow_forward
- One game at a carnival is called “Duck Pond.” This game consists of a large number of ducks that arefloating through an oval-shaped trough. A sign claims that 20% of the ducks have a blue dot on thebottom of them, 20% have a red dot, 20% have a green dot, 20% have a yellow dot, and 20% have anorange dot. Players pay to select one duck, show the color to the game attendant, replace the duck, spinaround once, and then select a second duck. If the dot on the bottom of the second duck matches the dotthat was on the bottom of the first duck, the player wins. Otherwise, the player loses. a) Are the events “color of the first duck” and “color of the second duck” independent? Explain. b) You want to perform a simulation to estimate the probability of winning this game, assuming theduck colors are distributed as claimed. Describe how you could use a table of random digits tocarry out this simulation without needing to skip any digits. c) Perform 10 trials of the simulation described in part (b)…arrow_forward1. Y; notation a) In this course, we are going to use the letter Y to signify a variable using the Y; notation. b) Y₁ is the it observation of the data set Y. (Y₁, Y2, Y3... Yn). c) If Y=1, 3, 5, 9, then Y₁=______ and Y3=_arrow_forwardOf interest is to determine if the employer of the meteorologist is associated with how well they track the storm. A random sample of 10 meteorologists employed by the U.S. National Weather Service was selected; a random sample of 10 meteorologists employed by a local television station within the United States was selected; and a random sample of 10 meteorologists employed in a country other than the United States was selected. Each was asked to predict the path of a named storm, and a score between 0 and 25 was assigned for each prediction. Of interest is to compare the mean score for the three groups of meteorologists. As described, is this an example of a controlled experiment or an observational study? Observational Study O Experimentarrow_forward
- Glencoe Algebra 1, Student Edition, 9780079039897...AlgebraISBN:9780079039897Author:CarterPublisher:McGraw Hill