Question
In: Math
Among the students at a particular college, the mean number of days absent from classes is...
Among the students at a particular college, the mean number of days
absent from classes is 3.5 with a standard deviation of 1.2.
Assuming absences at the college are normally distributed determine
the probability that 3 students all missed 5 days or more
days.
Solutions
Expert Solution
Given that ,
mean = 
= 3.5
standard deviation = 
= 1.2
n = 3
=
= 3.5
=
/ 
n = 1.2/
3 = 0.6928
P(
≥ 5) = 1 - P(
≤ 5)
= 1 - P[(
-
) /
≤ (5-3.5) /0.6928 ]
= 1 - P(z ≤ 2.17)
= 1 - 0.9808 = 0.0192
probability = 0.0192
Probability =
milcah answered 4 months agoRelated Solutions
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mean(data2$absent)
[1] 3
Geometic Mean:
GMx=Πi=1nX11n=2∙3∙2∙4∙2∙516=2.79816
>gmean <-
prod(data2$absent)^(1/length(data2$absent))
> gmean
[1] 2.798166
Median:
X=12n+1th,
Xi2,2,2,3,4,5,
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ranked value=3.5, value=2.5 days absent
>median(data2$absent)
[1] 2.5
Mode: Most frequent value=2
> mode <-
names(table(data2$absent))
[table(data2$absent)==max(table(data2$absent))]
> mode
[1]...
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M
Tu
W
Th
F
Number
111
80
85
94
99
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Professor Venkat is on a mission to find out the average number of students absent from...
Professor Venkat is on a mission to find out the average number
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1. T The following data represents the number of days absent from school in one school...
1. T The following data represents the
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0
1
2
2
2
4
5
5
7
7
7
7
8
8
8
8
8
8
10 10
12
12 12
13
14
...
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In a simple random sample of 51 community college statistics
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Verify that conditions have been satisfied:
Simple random
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The following data represent the number of days absent (x) and the final grade (y) for...
The following data represent the number of days absent (x) and
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Number of absences (x):
0
1
2
3
4
5
6
7
8 9
Final grade
(y):
89.2 86.4 83.5
81.1 78.2 73.9
64.3 71.8 65.5 66.2
Draw a scatter diagram on graph paper. The number of days
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Number of absences (x): 0 1 2 3 4 5 6 7 8 9
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a) Draw a scatter diagram on graph paper. The number of days
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The following data represent the number of days absent per year in a population of six...
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10
a. Compute the population mean.
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The data below represent the number of days absent, x, and the final grade, y, for...
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Number of absences, x
Final grade, y
0
88.5
1
85.6
2
82.5
3
79.9
4
76.9
5
72.4
6
62.6
7
67.1
8
64.1
9
61.1
(a) Find the least-squares regression line treating the number
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