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emmasim [6.3K]
3 years ago
9

Is how many sixth graders attend your school a statistical question?

Mathematics
2 answers:
HACTEHA [7]3 years ago
8 0
Yes, any question that involves numbers would be a statistical question. 
Bogdan [553]3 years ago
5 0
It depends, if you're asking a multitude of Junior High's it could be, here's an example of a question that would be statistical though.

<span>How many minutes do 6th grade students typically spend on homework each week?</span>
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23.82600 round to three significant figures​
fomenos

Answer:

23.8 i think

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
A track star runs two races on a certain day. The probability thathe wins the first race is 0.7, the probability that he wins th
NARA [144]

Answer:

a) 80% probability that he wins at least one race.

b) 30% probability that he wins exactly one race.

c) 20% probability that he wins neither race.

Step-by-step explanation:

We solve this problem building the Venn's diagram of these probabilities.

I am going to say that:

A is the probability that he wins the first race.

B is the probability that he wins the second race.

C is the probability that he does not win any of these races.

We have that:

A = a + (A \cap B)

In which a is the probability that he wins the first race but not the second and A \cap B is the probability that he wins both these races.

By the same logic, we have that:

B = b + (A \cap B)

The probability that he wins both races is 0.5.

This means that A \cap B = 0.5

The probability that he wins the second race is 0.6

This means that B = 0.6

B = b + (A \cap B)

0.6 = b + 0.5

b = 0.1

The probability that he wins the first race is 0.7.

This means that A = 0.6

A = a + (A \cap B)

0.7 = a + 0.5

a = 0.2

A) he wins at least one race.

This is

P = a + b + (A \cap B) = 0.2 + 0.1 + 0.5 = 0.8

There is an 80% probability that he wins at least one race.

B) he wins exactly one race.

This is

P = a + b = 0.2 + 0.1 = 0.3

There is a 30% probability that he wins exactly one race.

C) he wins neither race

Either he wins at least one race, or he wins neither. The sum of these probabilities is 100%.

From a), we have that there is an 80% probability that he wins at least one race.

So there is a 100-80 = 20% probability that he wins neither race.

6 0
3 years ago
Need help on some math "pictures "
vekshin1
1: (-1,2)
2: (2,5)
3: (3,0)
3 0
3 years ago
Evaluate the expression when a=-2 and x=7.<br> -2a+x
ziro4ka [17]

Step-by-step explanation:

-2a + x

Putting values of a = - 2 and x = 7

-2(-2) + 7

4 + 7

= 11

8 0
2 years ago
Read 2 more answers
A coral reef has 187 groups of fish in each group there are 21 fish about how many fish live in the coral reef and is it multipl
prisoha [69]

The answer is about 9. And it is a division problem.

5 0
3 years ago
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