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3 years ago

30 pts. In one study, it was found that the correlation coefficient between two variables is -0.95

Mathematics

2 answers:

nikitadnepr [17]3 years ago

8 0

Answer:

B. There is a strong negative association between the variables.

Step-by-step explanation:

The more negative the correlation coefficient, the more negative the association. The more positive the correlation coefficient, the more positive the association. If the correlation coefficient is near zero, there is no correlation.

ch4aika [34]3 years ago

3 0

Answer:

The correct option is B.

Step-by-step explanation:

It is given that the correlation coefficient between two variables is -0.95.

Correlation coefficient between two variables is denotes by ρ. The value of ρ is leis between -1 to 1.

If $\rho=-1$ , then it represent perfect negative correlation.

If $\rho=1$ , then it represent perfect positive correlation.

If $\rho=0$ , then it represent no relationship between the variables.

Since the -0.95 is near to the value -1, therefore we can say that there is a strong negative association between the variables. Option B is correct.

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djyliett [7]

Answer:

The answer is c man hope this helped

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3 years ago

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(20 points) A statistics practitioner calculated the mean and the standard deviation from a sample of 400. They are x = 98 and s

Nimfa-mama [501]

Answer:

The P-value is 0.0234.

Step-by-step explanation:

We are given that a statistics practitioner calculated the mean and the standard deviation from a sample of 400. They are x = 98 and s = 20.

Let = population mean.

So, Null Hypothesis, : = 100 {means that the population mean is equal to 100}

Alternate Hypothesis, : > 100 {means that the population mean is more than 100}

The test statistics that will be used here is One-sample t-test statistics because we're yet to know about the population standard deviation;

T.S. = ~

where, = sample mean = 98

s = sample standard deviation = 20

n = sample size = 400

So, the test statistics = ~

= -2

The value of t-test statistics is -2.

Now, the P-value of the test statistics is given by;

P( < -2) = 0.0234 {using the t-table}

8 0

3 years ago

Two non-simultaneous events have an equal likelihood of occurring (50%). If the events are independent of each other, what is th

BARSIC [14]

There are 4 possibilities:

1) No event happens
2) event A happens, not event B
3) event B happens, not event A
4) both events happen

seeing as there is a 50% chance of either event happening, I would assume that all 4 possibilities have an equal chance of happening

so if there are 4 events, then each one is 25% likely.

So the probability if them both occurring is 25%

I think

7 0

2 years ago

Read 2 more answers

Convert into decimals (use your calculator): a) 6/38 b) 45/55 c) 4/28 d) 35/28 e) 1030/2030

Delicious77 [7]

Answer:

$a.\hspace{3} \frac{6}{38} = 0.15789474\\\\b.\hspace{3} \frac{45}{55} = 0.81818181\\\\c.\hspace{3} \frac{4}{28} = 0.14285714\\\\d.\hspace{3} \frac{35}{28} = 1.25\\\\e.\hspace{3} \frac{1030}{2030} = 0.50738916$

Step-by-step explanation:

Rational numbers, expressed as decimal numbers, are obtained from the operation of division between the integer of the numerator and the integer of the denominator. Then:

$a.\hspace{3} \frac{6}{38} = 6\div38 = 0.15789474\\\\ b.\hspace{3} \frac{45}{55} = 45\div55 = 0.81818181\\\\c.\hspace{3} \frac{4}{28} = 4\div28 = 0.14285714\\\\ d.\hspace{3} \frac{35}{28} = 35\div28 = 1.25\\\\ e.\hspace{3} \frac{1030}{2030} = 1030\div2030 = 0.50738916$

3 0

3 years ago

Please help I got stuck on this on thank you

svetlana [45]

Answer is B. 3

2/3 x 3 = 6/3 = 2 cups

7 0

3 years ago