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babunello [35]
3 years ago
12

Which could be the missing data item for the given set of data if the median of the complete data set is 15? 11, 23, 12, 18, 11,

10, 19, 15, 19, 21, 13, 17, 24, 14
Mathematics
1 answer:
Kipish [7]3 years ago
4 0
Any number below 15, because the median (or very middle number) of this data set is between 15 and 17, so to make the median 15 one would need to add a number below 15 to counter  17, so that there would be an equal amount of numbers on either side of 15.
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Pls help rn pls pls pls if u answer correct ill mark u as brainliest
AlladinOne [14]

Answer:

the answer is 3

Step-by-step explanation:

is this a joke

3 0
2 years ago
Suppose that 12% of test scores for the unit 1 test were above 85 and 8% were below 70. Assuming a normal
Doss [256]

Answer:

Mean = 78.2

Standard deviation = 5.8

Step-by-step explanation:

Mathematically z-score;

= (x-mean)/SD

From the question;

12% of test scores were above 85

Thus;

P( x > 85) = 12%

P(x > 85) = 0.12

Now let’s get the z-score that has a probability of 0.12

This can be obtained from the standard normal distribution table and it is = 1.175

Thus;

1.175 = (85 - mean)/SD

let’s call the mean a and the SD b

1.175 = (85-a)/b

1.175b = 85 - a

a = 85 - 1.175b ••••••••(i)

Secondly 8% of scores were below 70

Let’s find the z-score corresponding to this proportion;

We use the standard normal distribution table as usual;

P( x < 70) = 0.08

z-score = -1.405

Thus;

-1.405 =( 70-a)/b

-1.405b = 70-a

a = 70 + 1.405b ••••••(ii)

Equate the two a

70 + 1.405b = 85 - 1.175b

85 -70 = 1.405b + 1.175b

15 = 2.58b

b = 15/2.58

b = 5.81

a = 70 + 1.405b

a = 70 + 1.405(5.81)

a = 78.16

So mean = 78.2 and Standard deviation is 5.8

4 0
3 years ago
From 5 employees at a company, a group of 3 employees will be chosen to work on a project. How many different groups of 3 employ
Andrei [34K]
Hello,

aPb=b*(b-1)*(b-2)*....*(b-a+1) / a!

3P5=5*4*3/(3*2*1)=10

If we name the number of the employers 1,2,3,4,5

Here are the choices:

123,124,125,134,135,145,234,235,245,345 (total 10 choices)

8 0
3 years ago
Read 2 more answers
How do you do 137 ÷ 7 in a area model
aliya0001 [1]
Hey,

If you were to divide 137/7 it would be it would be 19 or if you wont a decimal it would be 19.5

I Hoped that Helped 
8 0
2 years ago
Read 2 more answers
Gerardo says that a cube with edges that measure 10 centimeters has a volume that is twice as much as a cube with sides that mea
irga5000 [103]
He is wrong.
The 10 inch cube is bigger than the 5 inch cube by 5 cm in EACH DIRECTION.
So, the 10 inch cube should be twice as big in volume by a factor of 2*2*2
=8
Okay let's see.
5 cm cube volume = 5*5*5 = 125 cc
10 cm cube volume = 10 * 10 * 10 = 1,000 cc

1,000 / 125 = 8



5 0
2 years ago
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