Math 227 - Statistics » Spring 2023 » 03KC Measures of Center & Variation
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Question #1
Find the mean peanut count per snack pack. Five randomly sampled snack packs yielded the following peanut counts: 62 peanuts, 62 peanuts, 66 peanuts, 64 peanuts, and 63 peanuts.
A.
62.6
B.
63.4
C.
63.8
D.
64.8
Question #2
Find the median of these numbers: 25.40 21.10 20.42 20.48 20.73 21.10 20.66
A.
21.84
B.
20.73
C.
23.82
D.
22.14
Question #3
Find the median of these numbers: 45.40 41.10 40.42 40.73 40.48 41.10
A.
41.262
B.
40.915
C.
42.513
D.
42.134
Question #4
Find the Mode: 35.40 31.10 30.42 30.73 30.48 31.10
A.
33.42
B.
32.4
C.
30.73
D.
31.1
Question #5
Find the Mode: 127 127 127 455 455 455 888 888 899
A.
127, 888
B.
455, 899
C.
No Mode
D.
127, 455
Question #6
Find the Mode: 11 22 33 46 57 68 79 100
A.
79
B.
No Mode
C.
11
D.
46
E.
100
F.
57
Question #7
In this knowledge check online environment, please use the following data: Miles Freq 0-4 3 5-9 14 10-14 13 15-19 4 Calculate the mean miles driven to LAVC.
A.
9.6471
B.
9.1437
C.
8.9781
D.
8.1424
Question #8
Find the standard deviation of the peanut count. (Round to the nearest ten-thousandth). 62 peanuts, 62 peanuts, 66 peanuts, 64 peanuts, and 63 peanuts
A.
2.1042
B.
1.6733
C.
1.9935
D.
1.1124
Question #9
In this knowledge check online environment, please use the following data: Miles Freq 0-4 3 5-9 14 10-14 13 15-19 4 Calculate the standard deviation of miles driven to LAVC.
A.
4.6831
B.
5.5475
C.
3.9864
D.
4.1259
Question #10
STATDISK has the ability to calculate the mean, median, midrange, standard deviation, variance, range, five-number summary, confidence interval for mean, confidence interval for standard deviation, and confidence interval for variance, and to plot the boxplot and normal quantile plot for data by using the explore data function to find descriptive statistics. The next questions are designed to introduce you to this function within STATDISK. For more information, please review the following tutorial. Always feel free to pause and/or restart the video. Do not use this function to plot histograms. Adjustment of user-defined class width and class start values are not possible from this function. Consider these numbers: 209, 211, 57, 109, 67, 161, 131, 210 Enter these numbers into column 1 of STATDISK. What is the mean?
A.
164.371
B.
144.375
C.
123.125
D.
154.298
Question #11
Consider these numbers: 3.79, 4.83, 1.07, 6.7, 7.28, 9.14, 9.02 Enter these numbers into column 2 of STATDISK. What is the standard deviation?
A.
2.1436
B.
3.1426
C.
1.9826
D.
2.9343
Question #12
Consider these numbers: 99.7, 95.2, 14.3, -13.7, -4.1, 89.1, 28.8, -83.1, 22.4 Enter these numbers into column 3 of STATDISK. What is the variance?
A.
3,144.215
B.
3,590.107
C.
2,956.85
D.
4,268.22
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