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xz_007 [3.2K]
3 years ago
15

Two fractions between 2 and 2 1/2

Mathematics
2 answers:
Rudik [331]3 years ago
7 0
2 1/4

2 1/3

These two fractions are both less than 2 1/2 but greater than 2
Serggg [28]3 years ago
3 0

Answer:

2 1/4 and 2 1/3 would work well

Step-by-step explanation:

You might be interested in
Suppose IQ scores are normally distributed with mean 100 and standard deviation 10. Which of the following is false?
Trava [24]

93Answer:

C. An IQ score of 80 is more unusual than an IQ score of 120

is the false answer

Step-by-step explanation:

Firstly we need to find the probability of the test score to be less than 90(P<90) then we will continue finding the probability of the IQ score to be between 90 and 110(90<P<110) then we find the probability of the IQ score being more than 110 (P>110).

For P<90

Firstly we compute this using a scientific calculator where we choose the stat option and enter the mean of 100 and a standard deviation of 10, so we check if we make the normal random variable(X) to be 90 the outcome or answer for that is 0.16 so now we know the probability of the IQ score to be less than 90 is 16% chances.

For 90<P<110

then we check with the same method what will be the probability for an IQ score to be between 90 and 110 for a mean of 100 and a standard deviation of 10 we again check a normal  random variable(X) of 110 to see what will be the probability of P<110 which we find an answer of 0.84 which is 84% chances so now therefore the probability of an IQ score to be more than 110 is 0.

therefore this tells us an IQ score of 120 is more unusual than an IQ score of 120.

7 0
3 years ago
a volleyball team won 60%, or 18 of the games they played. write and solve an equation to determine the number of games the voll
brilliants [131]
The total number of games that they played is 30. 
(18 divided by 30 equals 0.6) (60%)

they lost a total of 12 games
(30 subtract 18 equals 12)
7 0
3 years ago
Scores of an IQ test have a​ bell-shaped distribution with a mean of and a standard deviation of . Use the empirical rule to det
Oduvanchick [21]

Complete question is;

Scores of an IQ test have a​ bell-shaped distribution with a mean of 100 and a standard deviation of 13. Use the empirical rule to determine the following.

​(a) What percentage of people has an IQ score between 87 and 113​?

​(b) What percentage of people has an IQ score less than 74 or greater than 126​? ​

(c) What percentage of people has an IQ score greater than 139​?

Answer:

A) 68% of the people had an IQ score between 87 and 113

B) 5% of the people had IQ scores less than 74 and greater than 126.

C) 0.15% had an IQ score greater than 139

Step-by-step explanation:

We are given;

Mean; x¯ = 100

Standard deviation; σ = 13

According to the empirical rule in statistics;

>> 68% of the data lies within one standard deviation of the mean

>> 95% of the data lies within two standard deviations of the mean

>> 99.7% of the data lies within three standard deviations

A) We want to find the percentage of people with an IQ score between 87 and 113.

Within one standard deviation, we have;

x¯ ± σ

>> (100 - 13), (100 + 13)

>> (87, 113) which is the range we are looking for.

Thus, 68% of the people had an IQ score between 87 and 113

B) we want to find percentage of people has an IQ score less than 74 or greater than 126.

Let's first find those who had between 74 and 126.

Let's use two standard deviations within the mean.

x¯ ± 2σ

>> (100 - (2×13)), (100 + (2×13))

>> (74, 126) which is the range we are looking for.

So percentage that have IQ scores between 74 and 126 is 95%

Thus;

Percentage of those who had less than 74 and greater than 126 is;

P = 1 - 95%

P = 5%

C) we want to find the percentage of people that had an IQ score greater than 139.

Let's use the z-score formula;

z = (x¯ - μ)/σ

z = (139 - 100)/13

z = 39/13

z = 3

This means it is 3 standard deviations above the mean.

Thus;

Since it's one side outside the mean, then;

Percentage of people with an IQ score greater than 139 = (1 - 99.7%)/2 = 0.3%/2 = 0.15%

5 0
3 years ago
In which of the following equations does f= -12​
tigry1 [53]

Answer:

C

118 - 4 (-12)= 166

118 + 48 = 166

166 = 166

5 0
3 years ago
Please help with the problem!
madam [21]

Answer:

3(2*-1)^2

solved is: 12

Step-by-step explanation:

7 0
3 years ago
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