Question

In a random sample of 20 adults over 50, what is the mean and standard deviation of those that wear sunglasses?

a) Mean = 0.74, Standard Deviation = 0.0422
b) Mean = 74, Standard Deviation = 0.74
c) Mean = 0.74, Standard Deviation = 4.22
d) Mean = 74, Standard Deviation = 42.2

Answer 1

The mean and standard deviation for the sample of adults over 50 who wear sunglasses are 0.74 and 0.0422, respectively. The correct option is a.

Step-by-step explanation:

The mean and standard deviation for the sample of adults over 50 who wear sunglasses can be calculated using the information given. In this case, the mean is given as 0.74 and the standard deviation is given as 0.0422.

To calculate the mean, you need to sum up all the values and divide by the number of values in the sample. To calculate the standard deviation, you need to find the square root of the variance, which is the average of the squared differences from the mean.

So, the correct answer is option a) Mean = 0.74, Standard Deviation = 0.0422.