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vampirchik [111]
2 years ago
10

Indicate whether the data is qualitative or quantitative, indicate whether the data is discrete, continuous, or neither, and ind

icate the level of measurement for the data:
The number of robberies that occurred last year in the 40 largest American ci
Mathematics
1 answer:
Ede4ka [16]2 years ago
7 0

Answer:

Quantitative.

Discrete.

Ratio

Step-by-step explanation:

The difference between quantitative and qualitative data is that the quantitative data can be interpreted numerically and qualitative data can be interpreted categorically.

The number of robberies can be meaningfully interpreted numerically, so, it represents quantitative data.

The difference between discrete and continuous data is that the discrete data can be interpreted as whole number and continuous data can be interpreted as any number.

The number of robberies can easily be counted and represented as whole number, so, it represents discrete data.

The difference between ratio and interval scale of measurement is that the ratio scale is used when data has meaningful zero i.e. zero means absence and interval scale is used when data has not meaningful zero i.e. zero doesn't mean absence.

The number of robberies can be measured through ratio scale because 0 robberies means no robbery.

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A team of 10 players is to be selected from a class of 6 girls and 7 boys. Match each scenario to its probability. You have to d
tankabanditka [31]
The selection of r objects out of n is done in

C(n, r)= \frac{n!}{r!(n-r)!} many ways.

The total number of selections 10 that we can make from 6+7=13 students is 

C(13,10)= \frac{13!}{3!(10)!}= \frac{13*12*11*10!}{3*2*1*10!}= \frac{13*12*11}{3*2}=  286
thus, the sample space of the experiment is 286

A. 
<span>"The probability that a randomly chosen team includes all 6 girls in the class."

total number of group of 10 which include all girls is C(7, 4), because the girls are fixed, and the remaining 4 is to be completed from the 7 boys, which can be done in C(7, 4) many ways.


</span>C(7, 4)= \frac{7!}{4!3!}= \frac{7*6*5*4!}{4!*3*2*1}= \frac{7*6*5}{3*2}=35
<span>
P(all 6 girls chosen)=35/286=0.12

B.
"</span>The probability that a randomly chosen team has 3 girls and 7 boys.<span>"

with the same logic as in A, the number of groups were all 7 boys are in, is 

</span>C(6, 3)= \frac{6!}{3!3!}= \frac{6*5*4*3!}{3!3!}= \frac{6*5*4}{3*2*1}=20
<span>
so the probability is 20/286=0.07

C.
"</span>The probability that a randomly chosen team has either 4 or 6 boys.<span>"

case 1: the team has 4 boys and 6 girls

this was already calculated in part A, it is </span>0.12.
<span>
case 2, the team has 6 boys and 4 girls.

there C(7, 6)*C(6, 4) ,many ways of doing this, because any selection of the boys which can be done in C(7, 6) ways, can be combined with any selection of the girls. 

</span>C(7, 6)*C(6, 4)= \frac{7!}{6!1}* \frac{6!}{4!2!} =7*15= 105
<span>
the probability is 105/286=0.367

since  case 1 and case 2 are disjoint, that is either one or the other happen, then we add the probabilities:

0.12+0.367=0.487 (approximately = 0.49)

D.
"</span><span>The probability that a randomly chosen team has 5 girls and 5 boys.</span><span>"

selecting 5 boys and 5 girls can be done in 

</span>C(7, 5)*C(6,5)= \frac{7!}{5!2} * \frac{6!}{5!1}=21*6=126

many ways,

so the probability is 126/286=0.44
6 0
3 years ago
Read 2 more answers
PLS SOLVE BRAILEST GIVEN
Sav [38]

Answer:

  |2x|

Step-by-step explanation:

The square root symbol indicates the positive square root. That is, ...

  \sqrt{x^2}=|x|

Then the square root you show is ...

  \sqrt{(-2x)^2}=|{-}2x|=\boxed{|2x|}

6 0
2 years ago
Which of the following statements is true about the quadratic function f(x) = ax2 + bx + c?
Dahasolnce [82]

Answer:

A

Step-by-step explanation:

A. The constants a, b, and c must be real numbers with a not ever equal to zero.

Please vote brainliest <3

6 0
2 years ago
Write an equation of the line that passes through (2, -3) and is perpendicular to the line y=-2x-3
Natalija [7]

Answer:

y=\frac{1}{2} (x-2)-3 or y=\frac{1}{2} x-4

Step-by-step explanation:

The perpendicular slope is the opposite-reciprocal of the original slope:

Perpendicular slope of -2 is \frac{1}{2}

Write the equation in point-slope form (y=a(x-h)+k):

y=\frac{1}{2} (x-2)-3

Convert to slope-intercept form if needed:

y=\frac{1}{2} x-1-3

y=\frac{1}{2} x-4

8 0
3 years ago
Read 2 more answers
How many time does 7 go into 117
creativ13 [48]
7 goes into 177 one time
7 0
3 years ago
Read 2 more answers
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