PSYC 60-For each case below, identify whether each of the two variables

For computation problems, show all of your work, round all intermediate andfinal results out to exactly 2 decimal places, and draw a box around yourfinal answer.1) [3 pts.] For each case below, identify whether each of the two variables isof nominal, ordinal, or continuous (quantitative) type. State whether thestudy is experimental or observational. If experimental, identify theindependent and dependent variables and note whether or not theindependent variable involves purely random assignment.a) Data is collected from 20 elves about both productivity (cookies made perday) and years of employment at the cookie factory. The question is whetherproductivity changes with years employed.b) All subject arrive at the lab at the same time. A roll of a die is used toplace each subject into either a placebo group or a new cold medicine group.If the die lands at 1,2, or 3, the subject is placed in the placebo group.Otherwise, they are placed in the cold medicine group. All are then exposedto a cold virus, sent home for 3 days to take their treatment, and then returnand rate their cold symptoms on a scale: none, mild, moderate, high, severe.c) Subjects are shown a video of a moving care running into a parked care.For half of the subjects, the title of the video is “Car hits car.” The other halfof subjects sees the identical video but with the title “Car smashes car.” Allsubjects are then asked how fast the car was moving (MPH). The researcherhas the hypothesis that estimated speed (in mph) will be faster for subjectswho saw the “smash” title than for those who saw the “hit” title (which is infact true). All subjects who saw the “hit” title were run in the first summerterm and all who saw the “smashed” title were run in the second summerterm.For problems 2 – 4 below, use the following set of scores. Treat these data asa sample. 43 27 34 50 36 109 10 42 27 55 93 45 98 58 68 24 70 79 64 93 5097 69 50 742) [6 pts.] Create grouped, relative, and cumulative relative frequencydistribution tables of the data. Use percent rather than proportion to makethe relative and cumulative relative frequency distributions. Also, be sure tofollow the guidelines from the textbook.3) [4 pts.] Create a histogram of the data from problem 2.4) [3 pts.] Calculate the major mode, the median, and mean for the datafrom problem 2.5. [3 pts.] Recalculate the mode, median, and mean if one additionalobservation, 200, is added to the 25 observations in the data set above (for anew total of 26 observations). (You can do this problem by using some of theresults you just calculated.) Which measure of central tendency changed themost? Which changed the least? Why? What would the new observation becalled by a statistician?6) [1 pt.] In the psychology department, there are 5 Golden Retrievers, 2German Shepherds, and one Pug dog. Which measure(s) of centraltendency can be used (identify all that apply)?7) [1 pt.] In the psychology department, 13 graduate students like mildsauce, 9 like medium, 12 like it hot, and 11 like it extra hot. Whichmeasure(s) of central tendency can be used (identify all that apply)?

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