Using the normal distribution, it is found that 1851 people would have an IQ less than 115.
<h3>Normal Probability Distribution</h3>
The z-score of a measure X of a normally distributed variable with mean
and standard deviation
is given by:

- The z-score measures how many standard deviations the measure is above or below the mean.
- Looking at the z-score table, the p-value associated with this z-score is found, which is the percentile of X.
The mean and the standard deviation are given, respectively, by:

The proportion of IQ scores less than 115 is the <u>p-value of Z when X = 115</u>, hence:


Z = 1
Z = 1 has a p-value of 0.8413.
Out of 2200 people:
0.8413 x 2200 = 1851.
More can be learned about the normal distribution at brainly.com/question/27643290
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Answer: A
Step-by-step explanation:
12 x 12 = 144
39 x 39 = 1521
1521 - 144 = 1377
root 1377 = 37.1
Answer:
-1 1/4 is greater than -1 3/4
Step-by-step explanation:
Positive and negative numbers are different. the bigger the positive number, the greater it is. The smaller the negative number, the greater it is.