2 years ago

Does someone know this answer

Mathematics

1 answer:

notsponge [240]2 years ago

5 0

$\bold{ANSWER:}$
Sample 3: 6 boys; 7 girls

$\bold{SOLUTION:}$

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4 years ago

The highway speeds of 100 cars are summarized in the frequency distribution below. Find the mean speed. Speed (MPH) Cars 30-39 5

Alexus [3.1K]

The mean speed of the 100 cars is 55.4

<h3>How to determine the mean?</h3>

The table of values is given as:

Speed (MPH) Cars

30-39 5

40-49 18

50-59 50

60-69 17

70-79 10

Rewrite the frequency table to include the class midpoints

x f

34.5 5

44.5 18

54.5 50

64.5 17

74.5 10

The mean speed is then calculated as:

$\bar x =\frac{\sum fx}{\sum f}$

So, we have:

$\bar x = \frac{34.5 * 5 + 44.5 * 18 + 54.5 * 50 + 64.5 * 17 + 74.5 * 10}{100}$

Evaluate

$\bar x = 55.4$

Hence, the mean speed is 55.4