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miss Akunina [59]
3 years ago
12

A certain test preparation course is designed to help students improve their scores on the GMAT exam. A mock exam is given at th

e beginning and end of the course to determine the effectiveness of the course. The following measurements are the net change in 4 students' scores on the exam after completing the course: 11,13,9,8 Using these data, construct a 90% confidence interval for the average net change in a student's score after completing the course. Assume the population is approximately normal. Step 1 of 4: Calculate the sample mean for the given sample data. Round your answer to one decimal place.
Mathematics
1 answer:
sasho [114]3 years ago
6 0

Answer:

Step-by-step explanation:

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Two fifth graders solved 400,000 divided by 800. Carter said the answer is 500, while Kim said the answer is 5,000.
mestny [16]

Answer:

a. Carter is correct. (See explanation).

b. The quotient is 500 (The quotient of 400,000 divided by 800 and the quotient of  is 4,000,000 divided by 8,000 are equal).

Step-by-step explanation:

a. Carter is correct.

The dividend 400,000  and the divisor 800 have two zeros in common, so we can eliminate those zeros. Then:

4,000\div8

We know that the quotient obtained by dividing 40 and 8 is 5:

40\div8=5

 Since4,000 has two more zeros than 40, we must place two zeros in the quotient. Then:

=500

b. The dividend 4,000,000  and the divisor 8,000 have three zeros in common, so we can eliminate those zeros. Then:

4,000\div8

Notice that this is the same as the exercise "a". So the quotient will be the same.

Let's check. We know that:

40\div8=5

 Since4,000 has two more zeros than 40, we must place two zeros in the quotient. This is:

=500

3 0
3 years ago
Read 2 more answers
Select the correct answer. If the function 5x + y = 1 has the domain (-2, 1, 6), then what is the corresponding range? OA. {-9,
Leokris [45]

Answer:

D) {11,-4,-29}

Step-by-step explanation:

rewrite the equation as y= -5x+1 and plug in -2,1 and 6 to get y

-5*-2+1=11

-5*1+1=-4

-5*6+1=-29

3 0
3 years ago
Rqw-xeix-ogw<br>Girls come on ​
Olegator [25]

Answer:

no bro

Step-by-step explanation:

6 0
3 years ago
The Supremacy Clause makes what the
Andrej [43]

Answer:

B. The United States Constitution

3 0
3 years ago
Four sisters bought a present for their mother. They received a 10% discount on the original price of the gift. After the discou
Orlov [11]

Answer:

$40

Step-by-step explanation:

x is the original price of the gift

(10% of x) is the value of the discount

(10% of x) = 10/100 . x = 0.1 x

0.1 x    is the value of the discount

x - (10% of x) is what was paid, after the discount

x - 0.1 x = 0.9 x

0.9 x    is what was paid

4 children paid $9/each

4 times $9 = $36

$36 is the total amount that was paid by the children

$36 = 0.9 x

$36 / 0.9 = x

x = $36 / 0.9 = 360 / 9

x = 40

;-)

4 0
4 years ago
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