Okay so finding the difference of 19 and 13.30, 5.70 is what we need to find when we start finding the sale percentage.
19*.15 = 2.85 (Too small!)
19*.25 = 4.75 (Not quite)
19*.30 = 5.70 (Bingo!)
The percentage off is 30%
Answer:
yes you are right bro
you said your not good well you just solved a problem that i needed help with from one of my friend.
Step-by-step explanation:
To answer this question, first calculate the z-score:
test score - mean score 65 - 70
z = ----------------------------------- = ------------------- = -5/10 = -0.5
std. dev. 10
We need to determine the area under the normal curve to the left of z = -0.5.
Refer to a table of z-scores, and look for z=-0.5. What area appears in connection with this z-score? It's less than 0.5000.
Using my TI-83 Plus calculator (specifically, its "normalcdf( " function, I found that the area under the std. normal curve to the left of z = -0.5 is 0.309.
Thus, the percentile is 30.9, or roughly 31 (31st percentile).
Roughly 31% of students earned a grade lower than 65, and roughly 69% earned a higher grade.
Answer:
1-m=-5/3
2-m=0
Step-by-step explanation:
Answer:
Step-by-step explanation:
the dot means multiply