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Masja [62]
3 years ago
7

3. On her math test, Heidi correctly

Mathematics
1 answer:
Mrrafil [7]3 years ago
7 0

Answer: option B is the correct answer

Step-by-step explanation:

On her math test, Heidi correctly

answered 35 of the 40 questions. This means the total number of questions in the math test is 40. If she was able to answer 35 correctly, that means the number of questions that she failed is total number of questions - the number of questions that she answered correctly. This becomes 40-35 = 5

This means that she failed 5 questions.

To find the percentage of questions that Heidi answered correctly, we will divide the number of questions that Heidi answered correctly by the total number of questions and multiply by 100%. It becomes

35/40 × 100 = 0.875 × 100

= 87.5%

Heidi answered 87.5% of the total questions correctly

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What would happen to the mean of the sampling distribution of p-hat if the Statistics major predicted the sampling distribution
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Answer:

Step-by-step explanation:

If repeated sample sizes of large sizes are taken at random, and proportion P is calculated for samples the sample mean will have a normal distribution irrespective of the original distribution.

In other words, the sample proportion will follow a normal distribution with mean = p-hat and std deviation =\sqrt{\frac{p(1-p)}{n} }

This is a direct corrollary of central limit theorem for sample means.

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4 years ago
Deena has 4 pairs of white socks, 3 pairs of black socks, 1 pair of red socks, and 2 pairs of navy socks in her sock drawer. Eac
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Answer:

<u>The  probability that Deena will choose a pair of white socks is 4/10 or 40%</u>

Step-by-step explanation:

Let's check the information provided to us to answer the question correctly:

Total pairs or socks Deena has = 10

Pairs of white socks Deena has = 4

Pairs of black socks Deena has = 3

Pairs of red socks Deena has = 1

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Probability of Deena will choose a pair of white socks = Pairs of white socks Deena has/Total pairs or socks Deena has

Replacing with the real values, we have:

Probability of Deena will choose a pair of white socks = 4/10 or 40%

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Answer:

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Step-by-step explanation:

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