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ASHA 777 [7]
3 years ago
7

For the fraction 3/25, (a) write a percent and (b) write a decimal.

Mathematics
2 answers:
Marysya12 [62]3 years ago
6 0

Answer:

12%

.12

Step-by-step explanation:

3/25 * 4/4 = 12/100

We know that out of 100 means percent

12%

Since it is over 100, move the decimal 2 places to the left

.12

Tatiana [17]3 years ago
6 0

Answer:

a. 12%

b. 0.12

Step-by-step explanation:

To make it easier to write it in both forms, you can make it into a fraction with 100 in the denominator.

You know that 25 * 4 = 100, so you would want to multiply both the numerator and the denominator by 4.

(3*4)/(25*4) = 12/100

12/100 is equal to 12%.

You can move the decimal two places to the left to divide it by 100.

12/100 is also equal to 0.12.

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a. Write down the equation you should use to construct the confidence interval for the average number of days absent per term for all the children. (10 points)

Confidence Interval = Mean ± Z score × Standard deviation/√Number of samples

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Confidence Interval = Mean ± Z score × Standard deviation/√Number of samples

Mean = 6 days

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= 6 ± 2.326 × 1.6/10

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= 6 - 0.37216

= 5.62784

6 + 0.37216

= 6.37216

Therefore, the 98% confidence interval = (5.62784, 6.37216)

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