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sergiy2304 [10]
3 years ago
13

A study is run to estimate the mean total cholesterol level in children 2 to 6 years of age. A sample of 9 participants is selec

ted and their total cholesterol levels are measured as follows. 180 220 240 196 175 183 195 140 200 What is the sample mean?A)196B)200C)192.11D)180
Mathematics
1 answer:
barxatty [35]3 years ago
8 0

Answer:

C) 192.11

Step-by-step explanation:

To find the mean of any group of numbers, you simply add up all the numbers and then divide by how many numbers there are.

Using a calculator or a pencil, add the following:

180 + 220 + 240 + 196 + 175 + 183 + 195 + 140 + 200

= 1,729

The last step is to divide 1,729 by 9:

1,729 ÷ 9 = 192.11

You might be interested in
Find 165.1% of 333.Round to the nearest hundredth.
inysia [295]

Answer:

We get that the 165.1% of 333 is 333 • 1.651 = 549.78

Step-by-step explanation:

1. They are asking for the 165.41%

2. So, we need to multiply 333 by the representation of 165.1% in decimal by doing the multiplication using a calculator

6 0
3 years ago
When asked to compare -9 and positive 2 Joshua wrote -9 >2 Joshua correct? If not explain and correct his error
morpeh [17]

Answer:

-9 < 2

Step-by-step explanation:

-9 is a negative number

2 is positive number

and of course -9 is smaller or < than 2

This means he is wrong becuase this symbol > means greater

He should correct it to -9 < (less) than 9

Hope this help you :3

8 0
3 years ago
The local newspaper has letters to the editor from 70 people. If this number represents 5% of all of the​ newspaper's readers, h
Alex Ar [27]

Answer:

This shows us that there are 1400 readers.

Step-by-step explanation:

To work this out you would first need to find how many times 5% goes into 100%, You can do this by dividing 100 by 5, this gives you 20. This is because the whole amount  is equivalent to 100%.

To work out the total number of readers you would multiply 70 by 20, this gives you 1400. This is because we know that 70 is equivalent to 5% and that 5% goes into 100% 20. So by multiplying 70 by 20 we are working out the total (100%), and that this shows us there are 1400 readers.

1) Divide 100 by 5.

100/5=20

2) Multiply 70 by 20.

70*20=1400

8 0
3 years ago
To make purple plum paint, the paint store mixes blue and red paint in a ration of 8:5 if a customer needs 65 gallon of paint ho
Olegator [25]

Answer:

Number of gallons of blue paint = 40 gallons

Number of gallons of red paint = 25 gallons

Step-by-step explanation:

We are given the ratio:

Blue paint : Red paint =

8 : 5

Sum of proportion = 8 + 5 = 13

If the customer need 65 gallons of paint,

a) Number of gallons of blue paint needed =

8/13 × 65 gallons = 40 gallons

b) Number of gallons of red paint needed =

5/13 × 65 gallons = 25 gallons

Therefore:

Number of gallons of blue paint = 40 gallons

Number of gallons of red paint = 25 gallons

3 0
3 years ago
Help i will give brainliest and no links or i will report
amm1812

Answer:

c

Step-by-step explanation:

math

3 0
3 years ago
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