The mean number of touchdowns per football game is 3.7 with a population standard deviation of 0.9. A random sample of 31 footba
1 answer:
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Given the equation
Check all options:
A. , this means that
Substitute these numbers into the left side of the equation equation:
This option is false.
B. , this means that
Substitute these numbers into the left side of the equation equation:
This option is false.
C. , this means that
Substitute these numbers into the left side of the equation equation:
This option is false.
D. , this means that
Substitute these numbers into the left side of the equation equation:
This option is true.
Answer: correct choice is D.
Answer:
Standard deviation gets smaller
Step-by-step explanation:
No. of students = 45
The class had an average of 56 words per minute (WPM) with a standard deviation of 7 WPM.
The teacher realized that the data from one student who typed 55 WPM was not entered.
So, new sum = 2520+55
New sum =2575
So, new mean =
New mean =57.22
Standard deviation is the measure of distance between observation and mean
So, if number gets closer to mean , Standard deviation gets smaller . if the numbers get bigger , Standard deviation gets bigger.
Since 55 is closer to 57.22
So, Standard deviation gets smaller
I hope this helps! Just follow the instructions.
