Answer:
A
Step-by-step explanation:
Answer:
True
Step-by-step explanation:
<h2>
Answer with explanation:</h2>
Given : A standardized exam's scores are normally distributed.
Mean test score : 
Standard deviation : 
Let x be the random variable that represents the scores of students .
z-score : 
We know that generally , z-scores lower than -1.96 or higher than 1.96 are considered unusual .
For x= 1900
Since it lies between -1.96 and 1.96 , thus it is not unusual.
For x= 1240
Since it lies between -1.96 and 1.96 , thus it is not unusual.
For x= 2190
Since it is greater than 1.96 , thus it is unusual.
For x= 1240
Since it lies between -1.96 and 1.96 , thus it is not unusual.
During an emergency exercise, a submarine dives 37 ft, rises 16 ft, and
then dives 18 ft. The net change in the submarine's position = - 37 + 16 - 18
Net change is the difference between a security's closing price for a given trading period and its closing price for the current trading session. The term "net change" for stock prices often refers to a daily time frame, therefore the net change for the specific day in question might be either positive or negative.
Therefore, the net change = -39 ft.
What is a net change?
- Net change is the difference between the quantity of a variable at the end state and the starting state.
- For example, start with some number. Add 10 to it, subtract 5 from it, again add 7, then subtract 16.
- The net change will be 10 + 5 + 7 - 16 = 6
- Whatever number you have started with, the result is 6 more.
To learn more about the net change, visit:
brainly.com/question/16410429
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