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3 years ago

15 POINTS!!! how do I solve these questions??

Mathematics

1 answer:

DENIUS [597]3 years ago

4 0

B,C,C As i worked them out :3 hope this helps

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Ede4ka [16]

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Step-by-step explanation:

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Below are the line plots for two data sets . Find the mean of each data set

STALIN [3.7K]

Sorry if this isn’t the right answer :(
A. 2 + 1 + 2 + 1 + 2 / 5 = 1.6

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3 years ago

The Office of Student Services at UNC would like to estimate the proportion of UNC's 34,000 students who are foreign students. I

Pachacha [2.7K]

Answer:

Mean is 3.05

Standard deviation is 1.69.

Step-by-step explanation:

For each student, there are only two possible outcomes. Either they are foreign, or they are not. This means that we can solve this problem using concepts of the binomial probability distribution.

Binomial probability distribution

The probability of x sucesses on n repeated trials, with p probability.

In this problem, we have a sample of 50 students, so $n = 50$ . The proportion of all UNC students that are foreign students is 0.061, so $p = 0.061$ .

The mean is given by the following formula:

$E(X) = np = 50*0.061 = 3.05$

The standard deviation is given by the following formula:

$\sigma = \sqrt{n*p*(1-p)} = \sqrt{50*0.061*(1-0.061))} = 1.69$

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3 years ago

How is estimating the quotient help you place the first digit in the quotient of a division problem

Elis [28]

You can use many different strategies to find the answer to a division problem. One strategy is to use repeated subtraction. To find 123 ÷ 36, think: How many groups of 36 are there in 123? Start with 123. Subtract 36 repeatedly. Count how many times you subtracted: 123 − 36 = 87 (1); 87 − 36 = 51 (2); 51 − 36 = 15 (3); 15 < 36. There are 3 groups of 36 in 123 with 15 left over. Therefore, 123 ÷ 36 = 3 R15.

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3 years ago

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