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Diano4ka-milaya [45]
2 years ago
7

A school of 580 students, one class was asked which hand they write with. • “L” means they use their left hand. • “R” means they

use their right hand. Here are the results: L, R, R, R, R, R, R, R, R, L, R, R, R, R, R.
Based on this sample, estimate the proportion of students at the school who write with their left hand.
Mathematics
2 answers:
allochka39001 [22]2 years ago
8 0
Count the L’s to find the number of students
Irina18 [472]2 years ago
7 0

Answer:

2 People raised their hand for Left handers

Step-by-step explanation:

Just count the 2 Ls

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<u><em>Answer:</em></u>

<u><em>y = 50</em></u>

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<u><em>Since 20 is even with 100, all we have to do is multiply both sides by 5.</em></u>

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2 years ago
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mamaluj [8]

The mean is the average value of a given set of numbers, and the median is the number in the middle of a set of numbers arranged in increasing order

The correct values as response to the questions are;

The minimum possible <em>top score</em> is <u>21</u>

The maximum possible <em>top score</em> is <u>32</u>

The <em>minimum </em>of the possible <em>standard deviation</em> is approximately <u>1.26</u>

The <em>maximum </em>of the possible <em>standard deviation</em> is approximately <u>11.7</u>

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The reason the above values are correct are as follows:

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The given parameters are;

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The amount of points for each problem = 1 point

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The mean Score = 10

Required:

The minimum possible score;

The maximum possible top score

The minimum of the possible standard deviations

The maximum of the possible standard deviations

Solution:

Given that there is a score (the median) which is 9, we have;

The scores obtainable in the test is Scores ≥ 9

Therefore, for a score of 10, we have;

The minimum total points obtainable = Mean × Number of students

Therefore;

Total minimum total points obtainable by the 5 students = 5 × 10 = 50

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By arrangement, with the median at the middle, the minimum possible top score is given as follows;

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Therefore, the minimum possible top score is <u>21</u>

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  • The maximum possible top score

The maximum possible top score is similarly given by arrangement of the numbers as follows'

0, 0, 9, 9, 32

The maximum possible top score is <u>32</u>

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By arrangement and selection, the minimum standard deviation is given as follows;

The minimum of the possible standard deviations of (9, 9, 9, 11, 12) ≈ <u>1.26</u>

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The maximum of the possible standard deviation is given as follows;

The maximum of the possible standard deviation of (0, 0, 9, 9, 32) ≈ <u>11.7</u>

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