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3 years ago

11

Which question is statistical? How old is my grandmother? What is the average age of my friends? What are the ages of my friends

' grandparents? Where did you celebrate your last birthday?

2 answers:

snow_tiger [21]3 years ago

7 0

The second one. It asks for an average age of friends. All others ask for specific details. Please give brainliest

lisabon 2012 [21]3 years ago

4 0

<span>What is the average age of my friends?</span>

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I need help can someone help me out

Natalija [7]

Answer:

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V' (-2,2)

N' (2,0)

Answered by GAUTHMATH

7 0

3 years ago

Jade wants to verify that the expression 5(3x-6) is equivalent to 15x - 30. She substitutes 2 into each expression and

rjkz [21]

5(3x-6) is equivalent to 15x - 30 if they are equivalent if the two values are the same.

<h3>What is expression?</h3>

An expression is a set of terms combined using the operations +, – , x or , /.

Given expression:

5(3x-6) is equivalent to 15x - 30.

If we put x=2 in both expression, we get finite value.

To check both the expression are equal or not we have to solve by putting the value.

So,

They are equivalent if the two values are the same otherwise not.

Learn more about expression here:

brainly.com/question/13947055

#SPJ1

8 0

2 years ago

Suppose approximately 75% of all marketing personnel are extroverts, whereas about 70% of all computer programmers are introvert

Setler [38]

Answer:

$P(x \ge 5) = 1.000$ ---- At least 5 from marketing departments are extroverts

$P(x=15) = 0.013$ ---- All from marketing departments are extroverts

$P(x = 0) = 0.002$ ---------- None from computer programmers are introverts

Step-by-step explanation:

See comment for complete question

The question is an illustration of binomial probability where

$P(x) = ^nC_x * p^x * (1 - p)^{n-x}$

$(a):\ P(x \ge 5)$

$n = 15$ --- marketing personnel

$p = 75\%$ --- proportion that are extroverts

Using the complement rule, we have:

$P(x \ge 5) = 1 - P(x < 5)$

So, we have:

$P(x < 5) =P(x = 0) + P(x = 1) + P(x = 2) + P(x = 3) + P(x = 4)$

$P(x = 0) = ^{15}C_{0} * (75\%)^0 * (1 - 75\%)^{15 - 0} = 1 * 1 * (0.25)^{15} = 9.31 * 10^{-10}$

$P(x = 1) = ^{15}C_{1} * (75\%)^1 * (1 - 75\%)^{15 - 1} = 15* (0.75)^1 * (0.25)^{14} = 4.19 * 10^{-8}$

$P(x = 2) = ^{15}C_{2} * (75\%)^2 * (1 - 75\%)^{15 - 2} = 105* (0.75)^2 * (0.25)^{13} = 8.80 * 10^{-7}$

$P(x = 3) = ^{15}C_{3} * (75\%)^3 * (1 - 75\%)^{15 - 3} = 455* (0.75)^2 * (0.25)^{12} = 0.0000153$

$P(x = 4) = ^{15}C_{4} * (75\%)^4 * (1 - 75\%)^{15 - 4} = 1365 * (0.75)^4 * (0.25)^{11} = 0.000103$

So, we have:

$P(x < 5) = (9.31 * 10^{-10}) + (4.19 * 10^{-8}) + (8.80 * 10^{-7}) + 0.0000153 + 0.000103$

$P(x < 5) = 0.00011922283$

Recall that:

$P(x \ge 5) = 1 - P(x < 5)$

$P(x \ge 5) = 1 - 0.00011922283$

$P(x \ge 5) = 0.9998$

$P(x \ge 5) = 1.000$ --- approximated

$(b)\ P(x = 15)$

$n = 15$ --- marketing personnel

$p = 75\%$ --- proportion that are extroverts

So, we have:

$P(x) = ^nC_x * p^x * (1 - p)^{n-x}$

$P(x=15) = ^{15}C_{15} * 0.75^{15} * (1 - 0.75)^{15-15}$

$P(x=15) = 1 * 0.75^{15} * (0.25)^{0$

$P(x=15) = 0.013$

$(c)\ P(x = 0)$

$n=5$ ---------- computer programmers

$p = 70\%$ --- proportion that are introverts

So, we have:

$P(x) = ^nC_x * p^x * (1 - p)^{n-x}$

$P(x = 0) = ^{5}C_0 * (70\%)^0 * (1 - 70\%)^{5-0}$

$P(x = 0) = 1 * 1 * (0.30)^5$

$P(x = 0) = 0.002$

3 0

3 years ago

Of a total of 422 indigenous and immigrant languages spoken in the united states, 10 more spoken languages are indigenous than a

Aleksandr-060686 [28]

201 - immigrant
221 - indigenous

Add 10 to indigenous and subtract 10 from immigrant.

7 0

3 years ago

Can u simplify 62/354 and if u can help

Oliga [24]

31/177 is the answer I’m pretty sure

7 0

3 years ago

Read 2 more answers