i need help with question 2e \"B A History of Mental II MATI 272FinalRev × > NIM
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i need help with question 2e
"B A History of Mental II MATI 272FinalRev × > NIMH . Treatment De postpartum depressic e Home l Chegg.com Invalid Session Statistics: Standard de O | file:///C/Users/kelly/Documents/MATI 272FinalReview.pdf 1. Use the following 20 values: 222, 233, 254, 241, 251, 268, 276, 220, 238, 253, 249,236, 247, 256, 261, 227,257,244,239,242 to perform the following tasks: a) Construct a frequency distribution table using 6 classes. b) Draw a histogram for the frequency distribution in part (a). c) Draw a frequency polygon for the frequency distribution in part (a) 2. The data set below is a sample of the Mathematics test scores of 10 students: 56, 96,78, 67, 60, 69, 85, 90, 89,72 (a) Find the mean and median of the given test scores (b) Is there a mode value for these scores? Why or why not? (c) Find the range and standard deviation (nearest hundredth) of these scores. (d) Find the percentile rank of 78 (e) What percent of these scores are within 1 standard deviation from the mean? data: 22, 31,42, 49, 35, 24, 58, 61, 73, 24, 32, 42, 98, 61, 58 3) a) Draw a Stem and Leaf Graph using the fo b) Prepare a box-and-whiskerplot for these values indicate an outliers. 4. The chart below records number of hours 12 students snent online during theExplanation / Answer
2.e)
Score
56
96
78
67
60
69
85
90
89
72
Mean = (56+96+..+72)/10 = 76.2
Score
56
96
78
67
60
69
85
90
89
72
x-Mean
-20.2
19.8
1.8
-9.2
-16.2
-7.2
8.8
13.8
12.8
-4.2
Variance = Sum[{(x- mean)^2} /n]
= [(-20.2)^2 +… +(-4.2)^2]/10
=165.16
Std deviation = Sq.rt(variance) = 12.85
Thus, 1 std. deviation from mean = mean +_ std deviation
Thus range is (76.2-12.85 to 76.2+12.85) i.e. (63.35 to 89.05)
The numbers which fall in this range are 78,67,69,85,89,72.
Thus, 6 out of 10 i.e 60% fall in given range
Score
56
96
78
67
60
69
85
90
89
72
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