Question

The accompanying frequency table shows the heights? (in inches) of 130 members of a choir. a right parenthesis Find the median and IQR. b right parenthesis Find the sample mean and sample standard deviation. c right parenthesis Display these data with a histogram. d right parenthesis Write a few sentences describing the distribution of heights. frequency table of heights of choir members. ?

Height Count

60 1

61 6

62 10

63 6

64 3

65 20

66 19

67 9

68 13

69 5

70 9

71 8

72 10

73 5

74 1

75 4

76 1

Answer #1

height = 60:76

count = c(1,6,10,6,3,20,19,9,13,5,9,8,10,5,1,4,1)

d = cbind(height,count)

d=as.data.frame(d)

d2= <- rep(d$height, d$count)

multi.fun <- function(x) {

c(mean = mean(x), median = median(x), sd = sd(x),IQR =
IQR(x))

}

multi.fun(d2)

mean median sd IQR

67.192308 66.500000 3.725246 5.000000

a) median = 66.5000 and Interquartile range = Q3-Q1 = 5.000

b) sample mean = 67.192308 sample standard deviation = 3.725246

c)

see the attachement

d) The curve look like normal approximately at maximum value that mode at the 65 near to mean = 67.192308 and median = 66.500

The heights (in inches) of 10 adult males are
listed below. Find the sample standard deviation. Round to the
nearest hundreth.
Start 1 By 10 Matrix 1st Row 1st Column 70 2nd Column
72 3rd Column 71 4st Column 70 5st Column 69 6st Column 73 7st
Column 69 8st Column 68 9st Column 70 10st Column 71
EndMatrix 70 72 71 70 69 73 69 68 70 71

Find the expected value and standard deviation of heights for a
basketball player on Team Z given the the following information.
hint: find the probability (relative frequency) for each height
first: Height (x in inches) # of Players 72 1 73 3 74 3 75 5 76 6
77 5 78 3 79 1 2. How would the expected value and standard
deviation change if the height for every player was was actually 1
inch taller? Provide both an explanation...

1)What would be the level of measurement for the quantity of
Funko Pops owned by the people in a statistics class?
a) Ordinal
b) Nominal
c) Interval
d) Ratio
2) Which sampling method was used if a researcher studying the
annual income of students went classroom to classroom during the
11:00 AM period and asked to randomly speak to 3 students in each
room?
a) Stratified Sampling
b) Convenience Sampling
c) Cluster Sampling
d) Systematic Sampling
3) the height (in...

StudentNO
Gender
Height in inchese
1
Female
63
2
Female
64.0
3
Male
67.0
4
Female
59
5
Male
60
6
Female
61
7
Female
62
8
Female
63
9
Female
63
10
Female
64
11
Male
64
12
Female
65
13
Female
65
14
Female
65
15
Female
65
16
Female
66
17
Female
66
18
Male
67
19
Male
67
20
Male
67
21
Female
67
22
Male
67
23
Male
67
24
Female
67.5
25
Male
68...

Using the accompanying Student Grades data, construct a scatter
chart for midterm versus final exam grades and add a linear
trendline. What is the model? If a student scores 7878 on the
midterm, what would you predict her grade on the final exam to
be?
Student
Midterm
Final Exam
1
75
64
2
85
91
3
80
68
4
88
83
5
76
60
6
67
80
7
78
74
8
95
94
9
67
61
10
93
87
11...

The following table shows the grades (out of 100) for a sample
of 8 randomly chosen students on two consecutive exams. Construct
the 90% confidence interval for the difference of mean grades on
the two exams. Round your answer to 2 decimal places. Can it be
concluded that the grades on the second test were significantly
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Student #: 1 2 3 4 5 6 7 8
Test 1: 67 88 76 88 91 95 79...

Student
What is your height in inches?
What is your weight
in pounds?
What is your
cumulative Grade Point Average (GPA) at FTCC or your primary
college?
How many hours do you
sleep each night?
1
67
100
4
7
2
62
105
4
5
3
72
120
4
8
4
61
125
4
7
5
56
105
3.7
6
6
61
120
4
7
7
65
172
3.8
7
8
72
235
3.22
5
9
63
135
4
6...

Find the standard deviation, s, of sample data summarized in
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frequency, and n represents the total number of sample values.
Also, compare the computed standard deviation to the standard
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11.1
sequals=StartRoot StartFraction n left bracket Summation from
nothing to nothing left parenthesis f times x squared right
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The data in the accompanying table represent the heights and
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Complete parts (a) through (c) below.
Player Height_(inches) Weight_(pounds)
Player_1 76 225
Player_2 75 195
Player_3 72 180
Player_4 82 231
Player_5 69 185
Player_6 74 190
Player_7 75 228
Player_8 71 200
Player_9 75 230
(b) Determine the least-squares regression line. Test whether
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level of significance.
Determine the...

The data in the accompanying table represent the heights and
weights of a random sample of professional baseball players.
Complete parts (a) through (c) below.
Player Height_(inches)
Weight_(pounds)
Player_1 75 227
Player_2 75 195
Player_3 72 180
Player_4 82 231
Player_5 69 185
Player_6 74 190
Player_7 75 228
Player_8 71 200
Player_9 75 230
(a) Draw a scatter diagram of the data, treating
height as the explanatory variable and weight as the response
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(b) Determine the least-squares...

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