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miv72 [106K]
3 years ago
8

Use the values on the number line to find the sampling error.

Mathematics
1 answer:
pantera1 [17]3 years ago
4 0
Part 1:

Given a number line with the point \bar{x}=3.8 and the point \mu=4.27

The sampling error is given by:

\bar{x}-\mu=3.8-4.27=-0.47



Part 2:

Given a number line with the point \bar{x}=26.43 and the point \mu=24.67

The sampling error is given by:

\bar{x}-\mu=26.43-24.67=1.76
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If x = 4 and y = 7, evaluate the - following expression: 20 +2(3y - 4x)​
Andrei [34K]

Answer:

30

Step-by-step explanation:

20+2(3*7 - 4*4)

20+2(21-16)

20+2*5

20+10

30

8 0
3 years ago
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A = {1, 3, 5, 7, 9}
lutik1710 [3]

The upside down U means the numbers the sets have in common.

Do what is in parenthesis first:

(B ∩ C) = 6 is the only common number in set B and Set C.

A ∩ (B ∩ C) = Would be all the numbers in A plus the number 6 from (B ∩ C).

The answer would be A) {1, 3, 5, 6, 7, 9}

8 0
3 years ago
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Y + 3y + 5y = -18 what is the value of y
ANEK [815]

Answer:

y = -2

Step-by-step explanation:

Step 1: Combine like terms.

  • (y+3y+5y)=-18
  • 9y=-18

Step 2: Divide both sides by 9.

  • 9y/9=-18/9
  • y=-2

Step 3: Check if solution is correct.

  • -2+3(-2)+5(-2)=-18
  • -2-6-10=-18
  • -18=-18

Therefore, y = -2.

7 0
2 years ago
You work at a craft store that sells paint kits. The kits have 4 thin paintbrushes for every 6 thick brushes. What is
liq [111]

Answer:2:3

Step-by-step explanation:

if you were to simplify the ratio just like you would a fraction you would get 2:3

6 0
3 years ago
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In Happyville, the ideal family has four children, at least two of which are girls. If you randomly select a Happyville family t
sleet_krkn [62]

Answer:

0.3125 = 31.25% probability that it is not ideal.

Step-by-step explanation:

For each children, there are only two possible outcomes. Either it is a girl, or they are not. The probability of a child being a girl is independent of any other child. This means that the binomial probability distribution is used to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

In which C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

And p is the probability of X happening.

0.5 probability of a children being a girl:

This means that p = 0.5

If you randomly select a Happyville family that has four children, what is the probability that it is not ideal?

Not ideal is less than two girls, so this is P(X < 2).

Four children means that n = 4. So

P(X < 2) = P(X = 0) + P(X = 1)

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

P(X = 0) = C_{4,0}.(0.5)^{0}.(0.5)^{4} = 0.0625

P(X = 1) = C_{4,1}.(0.5)^{1}.(0.5)^{3} = 0.25

P(X < 2) = P(X = 0) + P(X = 1) = 0.0625 + 0.25 = 0.3125

0.3125 = 31.25% probability that it is not ideal.

7 0
2 years ago
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