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d1i1m1o1n [39]
2 years ago
13

The scores listed below are the results from students taking a dexterity test. What is the 75th percentile of these scores? 1, 1

, 1, 1.5, 2, 2, 2, 2.5, 3
A 2
B 2.25
C 2.5
Mathematics
2 answers:
boyakko [2]2 years ago
7 0
The answer is B 2.25
KatRina [158]2 years ago
6 0

Answer:

75th percentile is:

B 2.25

Step-by-step explanation:

We are given a list of scores:

    1, 1, 1, 1.5, 2, 2, 2, 2.5, 3

Now, we have to calculate the 75th percentile

P(k) i.e. kth percentile is calculated as

    \dfrac{k\times (n+1)}{100} th observation

where n is the total number of obsevations

Here n=9  and k=75

so, P(75)=   \dfrac{75\times (9+1)}{100} th observation

             =    \dfrac{75\times (10)}{100} th observation

            =  7.5 th observation

           =   (2+2.5)/2

           =   2.25

Hence, 75th percentile is 2

Hence, option B is correct

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The dotplot shows the heights of 25 students in Mrs. Navard’s statistics class.
Zolol [24]

Answer:

A)Percentile for Lynette, the student who is 65 in. tall is 36th

B) Asher is 22 inches tall.

Step-by-step explanation:

Percentile : It is a measure used in statistics indicating the value below which a given percentage of observations in a group of observations falls

A) Find the Percentile for Lynette, the student who is 65 in. tall.

No. of students below 65 inch =9

So, Percentage of data below 65 inch =\frac{9}{25} \times 100 = 36 \%

So, Percentile for Lynette, the student who is 65 in. tall is 36th

B)Ashers height is at the 88th percentile of the distribution. Interpret this value in context. How tall is Asher

88=\frac{x}{25} \times 100 \\\frac{2200}{100}=x

22=x

So, No. of students below or st 88th percentile = 22

So, Asher is 22 inches tall.

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2 years ago
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Rudiy27

Answer:

not a right triangle

Step-by-step explanation:

you can use the pythagorean theorem to prove whether not this is a right triangle

if this triangle is a right triangle then the following equality should be true

a²+b²=c²

(9.75)²+(3.45)²=(10.24)²

(95.06)+(11.90)=(104.86)

106.96≠104.86

since the following equality is not true, this is not a right triangle.

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The population Mean of hours slept of all the members of the theater group is 8.3 hours.

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