How far from the mean does a value in a normal distribution fall

Step-by-step explanation:

The Standard Normal curve, shown here, has mean 0 and standard deviation 1. If a dataset follows a normal distribution, then about 68% of the observations will fall within of the mean , which in this case is with the interval (-1,1). About 95% of the observations will fall within 2 standard deviations of the mean, which is the interval (-2,2) for the standard normal, and about 99.7% of the observations will fall within 3 standard deviations of the mean, which corresponds to the interval (-3,3) in this case. Although it may appear as if a normal distribution does not include any values beyond a certain interval, the density is actually positive for all values, . Data from any normal distribution may be transformed into data following the standard normal distribution by subtracting the mean and dividing by the standard deviation .

Example:

The dataset used in this example includes 130 observations of body temperature. The MINITAB "DESCRIBE" command produced the following numerical summary of the data:

Variable N Mean Median Tr Mean StDev SE Mean

BODY TEMP 130 98.249 98.300 98.253 0.733 0.064

Variable Min Max Q1 Q3

BODY TEMP 96.300 100.800 97.800 98.700

Their are 45 boys.

Step-by-step explanation:

Let's represent Girls by G,and Boys by B

so G = 27 and B = ? and G/B = 3:5 or 3/5

3 = 27

5. B

3B = 135

3. 3

B = 45