Find the MEAN for the data set: 6, 2, 7, 3,2

Mathematics

2 answers:

Alexeev081 [22]2 years ago

8 0

4. if you add all the numbers together, you’ll get 20. if you divide that by how many numbers there are, you’d get 4.

shtirl [24]2 years ago

6 0

Answer:

Step-by-step explanation:

To find MEAN, add up all the values in a data set and then divide by the number of values.

6+2+7+3+2 = 20

Number of values in data set: 5

20÷5= 4

You might be interested in

Write and solve the sentence as an inequality. A number minus 3 is less than -5.

Lorico [155]

Answer:

x - 3 < -5 is the inequality x < -2 is the solution

Step-by-step explanation:

x - 3 < -5

add 3

x < -2

5 0

3 years ago

Abbie, Beth, Carl, Diego, and Elena are waiting in line. Use the following information to figure out which of the five is first

zlopas [31]

Abbie is not next to Elena or Carl

5 0

2 years ago

A doctor wants to estimate the mean HDL cholesterol of all 20- to 29-year-old females. The number of subjects needed to estima

Ludmilka [50]

Answer:

$n=(\frac{1.64(14.7)}{3})^2 =64.57 \approx 65$

So the answer for this case would be n=65 rounded up to the nearest integer

And the sample size would decrease by 160-65=95 subjects

Step-by-step explanation:

1) Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

$\bar X$ represent the sample mean for the sample

$\mu$ population mean (variable of interest)

s represent the sample standard deviation

n represent the sample size

ME represent the margin of error

The confidence interval for the mean is given by the following formula:

$\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}$ (1)

2) Solution to the problem

Since the new Confidence is 0.90 or 90%, the value of $\alpha=0.1$ and $\alpha/2 =0.05$ , and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-NORM.INV(0.05,0,1)".And we see that $z_{\alpha/2}=1.64$