Question

With data series: (20, 22, 30, 23, 28, 25, 24, 25, 23, 21, 23) Construct a Box Diagram.

Answer #1

For constructing a box diagram we need to find 5-number summary statistics.

Minimum, First quartile (Q1) , Median , Third quartile ( Q3), Maximum.

Minimum = 20

First quartile = 22.5

( Using excel =QUARTILE(Select values,1))

Median is middlemost value when data is in increasing order.

20 | 21 | 22 | 23 | 23 | 23 | 24 | 25 | 25 | 28 | 30 |

Median = 23

Third quartile = Q3 = 25

( Using excel =QUARTILE(Select values,3))

Maximum = 30

Box Diagram is:

descriptive statistics
for the given data
4 8 18 20 21 22 23 24 25 26 27 28 29 30 31 31 32 32 33 33 34 35 36
37 38 39 47 53

You have the following sample of scores.
23, 24, 20, 22, 25, 21, 28, 24, 29, 28 mean = 24.4 ΣX2 = 6040
variance = 9.6
What is ΣX?
What is SS
What is the standard deviation?
What is the best measure of central tendency mean, median or
mode?
Why did you choose that measure of central
tendency?

BMI Before
BMI After
29
24
25
26
24
23
35
27
22
25
28
27
26
24
27
25
26
24
23
22
21
23
21
25
24
23
25
25
24
26
32
30
26
22
30
28
25
27
25
30
You need to create two histograms: one for the pre-BMI intervention
and another for the post-BMI intervention.
Please
provide your interpretation of the results. For example, you might
want to compare
the two
histograms and point...

Which data set would produce the following 5-number summary?
16, 21, 24, 26, 28
Group of answer choices
24, 18, 22, 23, 23, 21, 28
24, 18, 22, 25, 30, 21, 20
24, 16, 22, 28, 26, 21, 24
24, 16, 22, 25, 28, 21, 24

Consider the following data:
25
24
18
20
21
18
16
20
23
17
15
13
19
23
24
20
16
26
21
24
15
22
16
12
20
23
19
26
20
25
21
19
21
25
23
26
21
19
20
14
(a)
Develop a frequency distribution
using classes of 12-14, 15-17, 18-20, 21-23, and 24-26.
Class
Frequency
12-14
15-17
18-20
21-23
24-26
Total
(b)
Develop a relative frequency
distribution and a percent frequency distribution using the classes...

Using the table below, compute the correlation coefficient. X 20
21 22 23 24 25 26 Y 100 98 99 101 99 98 97 Select one: a. -0.9793
b. -0.5162 c. 0.5162 d. 0.9793

Data for two variables, x and y, follow.
xi
22
24
25
28
41
yi
12
23
31
36
69
a. Develop the estimated regression equation
for these data (to 2 decimals). Enter negative value as negative
number.
y=-43.71+2.78x
b. Compute the standardized residuals for these
data (to 2 decimals). Enter negative value as negative number.
xi
yi
Standardized
Residual
22
12
24
23
-0.02
25
31
1.31
28
36
41
69
c. Compute the leverage values for these data...

Dataset:
Husband Wife
53 50
38 34
46 44
30 36
31 23
26 31
29 25
48 51
65 46
29 26
28 23
29 32
25 22
22 21
21 24
43 50
24 27
38 33
33 26
35 29
40 29
27 25
27 24
49 38
48 39
27 27
26 24
40 34
35 37
21 26
32 39
30 28
60 52
36 40
25 23
66 55
52 34
41 40
43 ...

Data set for ages of students in stats class:
17, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 19, 19, 19, 19,19,
20, 20, 20, 21, 21, 21, 21, 21, 21, 22, 22, 22, 22, 23, 23, 23, 23,
24, 25, 25, 25, 26, 26, 27, 28, 28, 28, 28, 29, 29, 32, 36, 42
1) Compute the 5-number summary and create a modified box-plot,
using the inner-quartile range to identify any outliers.

For the following Ungrouped Frequency Distribution
below :
x 14 18 20 21 24 25 28 30
f 4 8 3 8 2 5 7 4
1) Find ( Mean , Mode , Median , Range , Midrange , Standard
Deviation , Variance )
2) Find coefficient of variation
3) Compute the z-score of 28

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