One thousand and twenty students participated in the school math contest. Sample 1 is a random sample from grades 9 and 10 and consists of the following scores: 72, 89, 67, 81, 75, 79, 81, 80, 62, 64, 83.

Sample 2 is a random sample from grades 11 and 12 and consists of the following scores: 84, 86, 87, 84, 86, 89, 90, 87, 87, 84, 86.

Choose the following statements that correctly compare the two samples.
Check all that are true.

A). Sample 2 shows 11th and 12th grade students, on average, did better.

B) . Sample 1 has a higher probability than Sample 2.

C). The measure of center is the same for both samples.

D). Sample 1 shows 9th and 10th grade students, on average, did better.

E). Sample 2 has a higher median score than Sample 1.

Answers

Answer 1
Answer:

Answer:

E)- Sample 2 has a higher median score than Sample 1.

Step-by-step explanation:

For comparing both samples by the median, We are more clear that Sample 2 (grades of 11th and 12th) is better than Sample 1 (grades of 9th and 10th).

We didn't choose other options because neither only seeing the samples nor by measuring the probability of both samples We do a better comparison of both the samples.

Also by measuring the mean and median of the both given samples we get both Option C and D are incorrect.

Answer 2
Answer: With the way its set up I would have to say the answer id E. due to the fact that the average, or median is higher in sample 2.

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Mrs.Brown biked 35 miles in 2.5 hours. How many miles could she bike in 3 hours at the same rate

Answers

35 divided by 2.5 is 14, so she biked 14 miles in 1 hour. So 14*3= 42

She can bike 42 miles in 3 hours.

Math question down below

Answers

Answer:

315

Step-by-step explanation:

42 is 84 percent of 50. If you apply this to 375, you get 315 because 84 percent of 375 is 315

If 5 miles = 8km. how many km in 250 miles?

Answers

250 miles is equivalent to 400 kilometers.

We have,

To find out how many kilometers are equivalent to 250 miles, we can set up a proportion using the given information that 5 miles are equal to 8 kilometers.

5 miles : 8 kilometers

We can set up the proportion:

5 miles / 8 kilometers = 250 miles / x kilometers

To solve for x (the number of kilometers in 250 miles), we can cross-multiply and then divide:

5 miles x (x kilometers) = 8 kilometers x 250 miles

5x = 2000

Dividing both sides by 5:

x = 400

Therefore,

250 miles is equivalent to 400 kilometers.

Learn more about unit conversion here:

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The anwser is 400 km!!!

Which statement is true?21 is a multiple of 6.
21 is a multiple of 5.
21 is a multiple of 4.
21 is a multiple of 3.

Answers

Answer:

Multiple of 3 :)

Step-by-step explanation:

At the movies Liz eats 1/4 of a box of popcorn her friend kyra eats two times as much popcorn as Liz eats how much of a box of popcorn does kyra eat

Answers

1/2 box of popcorn. Because 2 x 1/4 = 2/4 which = 1/2.

Which expression has a value of 1? A.
4 ÷ 4 + 4 – 4


B.


4 · 4 – 4 ÷ 4


C.
4 – 4 ÷ 4 – 4


D.
4 ÷ 4 + 4 + 4

Answers

I am adding the brackets to show in which order the expressions will be evaluated:
A.
(4 ÷ 4) + 4 – 4 = 1+4-4 = 1 (the correct answer)

B.
(4 · 4) – (4 ÷ 4)= 16-1 = 15

C.
4 –( 4 ÷ 4) – 4= 4-1-4 = -1

D.
(4 ÷ 4) + 4 + 4 = 1+4+4 =9

A is the answer because 4 divided by 4 plus 4 minus 4 =1