Answer:
70.06
Mean score = 70
Step-by-step explanation:
16% of students scored higher than 80 on a recent normally distributed exam the standard deviation is 10 what is the mean
For a normal distribution :
Zscore = (x - mean) / standard deviation
x = score
P(Z > 80) = 16% = 0.16 ; corresponding Zscore = 0.994 (Z probability calculator)
Therefore ;
0.994 = (80 - mean) / 10
0.994 * 10 = 80 - mean
9.94 = 80 - mean
Mean = 80 - 9.94
Mean = 70.06
Hence, the mean score = 70.06 = 70
Answer:
it could be drawn using maths
Answer:
10
Step-by-step explanation:
Answer:
Both are false
Step-by-step explanation:
B is 3 units below P
After dilation B' will be 5 units below P so cannot be on the same horizontal line.
similarly segment CD is 3 units long,
After dilation segment C'D' will be 5 units long so is not equal to segment CD.
Answer:
-24 + 3b
Step-by-step explanation:
-3 times 8 - -3 times b
-24 - -3b
and leave it alone cause its not like terms
