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Burka [1]
2 years ago
12

Of the 300 fifth graders at Benson Elementary School, 40% signed up for an after-school activity. How many students signed up fo

r an after-school activity?
Mathematics
1 answer:
Trava [24]2 years ago
4 0

Answer: 120 students

Step-by-step explanation:

multiply 40 by 300 then divide by 100 = 120

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Assume that all conditions are met. The mean of the differences was 1. 33 and the standard deviation of those differences was 2.
Maurinko [17]

The test statistic for this procedure is using two sample T-test is 0.458.

Definition of Two Sample T-test

A variation of the Student's t-test used to determine if two sample means are substantially different is known as the two sample T-test (also known as Welch's t-test, Welch's adjusted T, or unequal variances t-test). The test's degrees of freedom have been changed, which generally boosts the test's power for samples with unequal variance.

T-Test Statistic for The Procedure

It is given that mean of the differences = 1.33

And, the standard deviation of the differences, standard error = 2.90

The test static formula is given as,

t = (estimate - hypothized value) / standard error

Here,  t is the t- test statistic, and estimate is the mean of the differences.

Since it is given that all conditions are met, the hypothized value can be taken as 0

Substituting substituting estimate = 1.33 and standard error = 2.90 in the t-test statistic formula, we get,

t = (1.33-0)/2.90

or t = 0.458

learn more about t-test here:

brainly.com/question/14128303

#SPJ4

8 0
2 years ago
What is the length of the missing leg? If necessary, round to the nearest tenth.
KengaRu [80]

<u>Answer:</u>

  • a = 3.5

<u>Step-by-step explanation:</u>

<u>Let's find 'a' using Pythagoras theorem.</u>

  • => 4² = 2² + a²
  • => 16 = 4 + a²
  • => 12 = a²
  • => a = √12
  • => a = √2 x 2 x 3
  • => a = 2√3
  • => a = 2 x √3
  • => a = 2 x 1.732
  • => a = 3.464 = 3.5 (Estimated)

Hoped this helped.

BrainiacUser1357

4 0
2 years ago
What is the simplified from of pi √3-8 pi√3<br>​
irina [24]

Answer:

-7pi √3

Step-by-step explanation:

Treating pi as a variable, the simplified value can be written as;

-7pi √3

This can be obtained from using the following simple methodology;

pi(√3 -8 √3)

= pi (-7 √3)

6 0
3 years ago
jackson is mowing lawns in his neighborhood in week 1 he mowed 20 lawn in week 2 lawn to mow decreased by 20% in 3 weeks he mowe
MAVERICK [17]

Answer:

the answer would be C because you would do 60 x 25 which would give you 1,500

Hope Dis help ya

6 0
2 years ago
Read 2 more answers
Can you please help me with this question
andrew-mc [135]
I hope I read it right, it's a bit blurry. The answer is C. 6/11. Hope it helps!
7 0
3 years ago
Read 2 more answers
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