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.

9. A group of 50 single men were asked which dating apps they had on their phones. The follo data were collected: 33 of the men had the Tinder app. 30 of the men had the Coffee Meets Bagel app. 26 of the men had the Hinge app. 16 of the men had both the Tinder and Coffee Meets Bagel apps. 14 of the men had both Tinder and Hinge apps. 18 men had both Hinge and Coffee Meets Bagel apps. 7 men had all three apps on their phones. a) Represent this information in a Venn diagram: b) Calculate the number of single men who have none of these apps on their phone. c) How many single men only had Tinder on their phone? d) How many students own at most two of the apps?

A random sample of 20 adults in a particular country were asked to state what type of birth control method they use. The results are in the table below. None None None Condom Condom Condom Pill Pill Other Other Pill Other Condom Condom Pill None Condom Pill Pill Other a) Since data were collected for            variable(s), the correct graph to make is a       . b) Complete the frequency/relative frequency table. Birth Control Type Frequency Relative Frequency None     Condom     Pill     Other     c) Which of the following is the correct bar chart for the given data?   2468Birth Control TypeFreqNoneCondomPillOther[Graphs generated by this script: setBorder(49,45,0,10); initPicture(0,13,0,8);axes(1000,2,1,1000,2); fill="blue"; textabs([165,0],"Birth Control…

Refer the following graph: Number of words recalled 9 5 4 ambient Memory Experiment 0 warm ab$WordType real nonsense Learning Environment (warm room vs cool room) a. Indicate whether there is a main effect of Word Type (real word or nonsense word). b. Indicate whether there is a main effect of Learning Environment (cool room or warm room). c. Indicate whether there is an A x B interaction effect.

1. In a psychological study of distance perception, introductory psychology class volunteers were given either 5 or 10 extra credit points depending on their level of participation in the experiment. They walked along paths laid out along hallways in the psychology building, and were asked to judge the distance they had walked. Each path distance was between 100 and 200 feet in length, and contained from two to seven 90 degree turns. The investigators also kept track of class standing (freshman, sophomore, junior, or senior) of each participant. For each of the variables in the study, determine whether it is qualitative or quantitative. For each quantitative variable, determine whether it is discrete or continuous. For each qualitative variable, determine whether it is nominal or ordinal. [4 pts.] a. The true length of the path b. The amount of credit given to volunteers c. Class standing d. The number of 90 degrees turns 2. In a survey of exercise habits, 1500 national adults were…

use. Do a conclusion about thiS 20.5 "reference" drugs that they imitate. One aspect in which ance times (second received the generic drug first, followed by the reference signed at random to the subjects. Subjects 1 through 10 matched pairs design. Numbers 1 through 20 were as- TABLE 20.5 Absorption extent for two drug first, followed by the generic drug. In all 20.50 Comparing two drugs. Makers of generic drugs must ght-hand and left. reads chow that they do not differ significantly from the Astep "reference" drugs that they imitate. One aspect in which Arugs might differ is their extent of absorption in the klood. Table 20.5 gives data taken from 20 healthy non- smoking male subjects tor one pair of drugs." This is a matched pairs design. Numbers 1 through 20 were as- signed at random to the subjects. Subjects 1 through 10 20. Subject Thread Th Right drug. Subjects 11 through 20 received the reference drug first, followed by the generic drug. In all cases, a washout period separated…

The association between occurrence of convictions and family income was examined by following a cohort of 395 boys for about 20 years, starting at age 8-9. The following table shows number of convictions with respect to three family income brackets: a)What type of table is this? b) Display the same data using a mosaic plot. c) What type of variable is income level? How should this affect your graph? d) By viewing the table and the graph, describe any apparent association between income and later convictions. e) Does the table or the graph better reveal the association between convictions and income? Pls help and explain all parts correctly, thank you