Amath teacher’s midterm is worth 200 points. the mean of the test is 143 and the standard deviation is 15.7. if the scores have a bell shaped distribution, what percentage of the scores are between 111.6 and 174.4? a. about 99.7% b. about 68% c. about 62.8% d. about 95%

The answer is D: about 95%.

Answer with explanation:

Mean,

Standard Deviation

Total Population = 200

Formula for Z Score and calculation of two Z scores.

Similarly,

So the two values that is , 111.6 and 174.4 , lies 2 standard deviation on left and 2 standard deviation on the right of mean.

→With the Help of Z table, the conclusion can be drawn that, 95 % of Data will lie within two standard deviation that is above and Below the Mean.

Option D: About 95%

3,000,540

step-by-step explanation:

step-by-step explanation:

first you will have to convert 3/4 into a decimal

which is .75

then you will have to divide 1.5 by .75

which is 2

no you have to divide