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Katarina [22]
3 years ago
10

A sample was done, collecting the data below. Calculate the standard deviation, to one decimal place.

Mathematics
1 answer:
Lilit [14]3 years ago
4 0

Using it's formula, it is found that the standard deviation of the data-set is of 8.9.

<h3>How the standard deviation of a data-set is found?</h3>
  • The standard deviation of a data-set is given by the <u>square root of the sum of the differences squared between each observation and the mean, divided by the number of values</u>.
  • The mean of a data-set is given by the <u>sum of all values in the data-set, divided by the number of values</u>.

In this problem, the data-set is: {6, 7, 5, 22, 26}.

The mean is:

M = \frac{6 + 7 + 5 + 22 + 26}{5} = 13.2

Hence, the <em>standard deviation</em> is:

S = \sqrt{\frac{(6-13.2)^2+(7-13.2)^2+(5-13.2)^2+(22-13.2)^2+(26-13.2)^2}{5}} = 8.9

You can learn more about the standard deviation at brainly.com/question/12180602

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Answer:

D - It is impossible to make a judgment with the given information.

Step-by-step explanation:

The fact that 1200 births were randomly selected and only 599 of such picks are girls does not give enough information on whether the birth is significantly high, low or neither. We must have other information to test for significance of the births proportion.

All we know is that;

Proportion of girls birth (p) = 599/1200 = 0.499. And by default, the proportion of male births (q) will be 1-p = 1-0.499 = 0.501.

If we examine the proportion closely, there seems to be no significant difference in the birth proportion.

Having said this, we cannot really imply that, the number of girls is significantly high. Or the number of girls is neither significantly low nor significantly high. Or the number of girls is significantly low.

The best subjective submission will be that, <em>there is no significant difference between girls birth and males birth.</em> The question of high or low (an alternative hypothesis) requires some further statistical test and this question does not provide further details.

8 0
3 years ago
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JulsSmile [24]
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7 0
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It is a collection or set of units or
tatyana61 [14]

Answer:

Population.

Step-by-step explanation:

Population can be defined as a collection or set of units or entities from whom we got the data.

This ultimately implies that, a population is the larger set from which other units can be picked from.

Hence, a population is an entire collection of outcomes or objects from which we can obtain or collect data. For example, the number of new born babies in a hospital, a country and the total number of football players in a soccer league.

Population = Movies.

Subset (sample) = comedy movies, horror movies, romance movies, and action movies.

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3 years ago
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