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german
2 years ago
11

What is 1/4 plus 1/3, will give brainliest and thank you and rate and give 15 points plz help

Mathematics
1 answer:
Slav-nsk [51]2 years ago
4 0
First, you have to convert 1/4 and 1/3 to have the same denominator. 

So, 1/4 x 3 = 3/12. 1/3 x 4 = 4/12.

Now, you can add 3/12 + 4/12 = 7/12.
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A small business ships specialty homemade candies to anywhere in the world. Past records indicate that the weight of orders is n
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Answer:

90% confidence interval for the true mean weight of orders is between a lower limit of 103.8645 grams and an upper limit of 116.1355 grams.

Step-by-step explanation:

Confidence interval for true mean weight is given as sample mean +/- margin of error (E)

sample mean = 110 g

sample sd = 14 g

n = 16

degree of freedom = n - 1 = 16 - 1 = 15

confidence level = 90% = 0.9

significance level = 1 - C = 1 - 0.9 = 0.1 = 10%

critical value (t) corresponding to 15 degrees of freedom and 10% significance level is 1.753

E = t × sample sd/√n = 1.753×14/√16 = 6.1355 g

Lower limit of sample mean = sample mean - E = 110 - 6.1355 = 103.8645 g

Upper limit of sample mean = sample mean + E = 110 + 6.1355 = 116.1355 g

90% confidence interval is (103.8645, 116.1355)

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