Mean the the total of all values, divided by the number of values
9(5)+8=53
All you have to do is plug 5 in for x
Answer:
For random samples of 100 seniors, 68% of the sample means fall between 340 and 520
Step-by-step explanation:
As a property of normal distribution, 68% of sample means fall between mean - sigma(430 - 90 = 340) and mean + sigma (430 + 90 = 520) (here, sigma is standard deviation).
Hope this helps!
:)
The exponent indicates how many times the number is used as a factor
Pretty sure it’s D (I’m adding more to this because I have to add more words to submit this answer in Brainly)