The selling prices of mutual funds change daily. In order to study these changes, a sample of mutual funds was examined and the daily changes in price are listed below.
0.05, 0.00, -0.03, -0.01, 0.18, 0.00, 0.02, 0.29, 0.00, -0.07, 0.10, 0.07, 0.
03
Determine the lower and upper fences. Are there any outliers according to this criterion?
Q. 2To study the physical fitness of a sample of 28 people, the data below were collected representing the number of sit-ups that a person could do in one minute.
10 12 12 15 15 15 18
20 22 25 25 26 29 30
32 33 40 40 40 45 46
47 48 48 50 52 53 56
Determine the lower and upper fences. Are there any outliers according to this criterion?
Q. 3The following data are the yields, in bushels, of hay from a farmer's last 10 years:
375, 210, 150, 147, 429, 189, 320, 580, 407, 180.
Find the IQR.
A) 279 B) 265 C) 227 D) 253
Q. 4A pharmaceutical testing company wants to test a new cholesterol drug. The average cholesterol of the target population is 200 mg and they have a standard deviation of 25 mg. The company wished to test a sample of people who fall between 1.
5 and 3 z-scores above the mean. Into what range must a candidate's cholesterol level be in order for the candidate to be included in the study?
A) 237.5 - 275 B) 162.5 - 275 C) 225 - 237.5 D) 125 - 162.5
Q. 5A farmer wishes to test the effects of a new fertilizer on her soybean yield. She has four equal-sized plots of land-- one with sandy soil, one with rocky soil, one with clay-rich soil, and one with average soil.
She divides each of the four plots into three equal-sized portions and randomly labels them A, B, and C. The four A portions of land are treated with her old fertilizer. The four B portions are treated with the new fertilizer, and the four C's are treated with no fertilizer. At harvest time, the soybean yield is recorded for each section of land. Identify the experimental units.
A) the soybean plants on the various plots of land B) the four types of soil
C) the three types of fertilizer D) the soybean yield at harvest time
Q. 6Find the z-score for the value 63, when the mean is 80 and the standard deviation is 1.
A) z = 0.78 B) z = -17.00 C) z = -18.00 D) z = -0.77
Q. 7A television station claims that the amount of advertising per hour of broadcast time has an average of 15 minutes and a standard deviation equal to 1.5 minutes.
You watch the station for 1 hour, at a randomly selected time, and carefully observe that the amount of advertising time is equal to 13 minutes. Calculate the z-score for this amount of advertising time.
A) z = 1.33 B) z = -0.77 C) z = -1.33 D) z = 0.77
Q. 8A medical journal published the results of an experiment on anxiety. The experiment investigated the effects of a controversial new therapy for anxiety.
Researchers measured the anxiety levels of 52 adult women who suffer moderate conditions of the disorder. After the therapy, the researchers again measured the women's anxiety levels. The differences between the the pre- and post-therapy anxiety levels were reported. Identify the experimental units.
A) the differences between the pre- and post-therapy anxiety levels
B) the 52 adult women who suffer from anxiety
C) the therapy time period (pre or post)
D) the disorder (anxiety or no anxiety)
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