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Burka [1]
3 years ago
9

A recent survey found that 76 ​% of all adults over 50 wear glasses for driving. in a random sample of 100 adults over​ 50, what

is the mean and standard deviation of those that wear​ glasses? round the answers to the nearest hundredth.
a. ​mean: 24.00 ​; standard​ deviation: 4.27
b. ​mean: 76.00 ​; standard​ deviation: 8.72
c. ​mean: 24.00 ​; standard​ deviation: 8.72
d. ​mean: 76.00 ​; standard​ deviation: 4.27
Mathematics
1 answer:
Mandarinka [93]3 years ago
7 0

Mean = np = 60(0.7) = 42

Standard deviation = sqrt(npq) = sqrt(60(0.7)(0.3)) = 3.55

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The attached graph represents the graph of the equation y1 = 17,105 + 1.31x

<h3>How to plot and graph the equation?</h3>

The equation is given as:

y1 = 17,105 + 1.31x

To plot and graph the equation, we set some values for x and calculate the corresponding y values.

Let x = 0, 1, 2 and 3.

So, we have:

y1 = 17,105 + 1.31 * 0 = 17105

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y1 = 17,105 + 1.31 * 2 = 17107.62

y1 = 17,105 + 1.31 * 3 = 17108.93

The graph can then be plotted using the above points

See attachment

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