Answer: 100
5
Step-by-step explanation:
a) The mean of a normal distribution is also the median. Half the population will have values above the mean. Half of 200 is 100, so ...
... 100 students will have grades above 70%.
b) 84% is 14% above the mean. Each 7% is 1 standard deviation, so 14% is 2 standard deviations above the mean. The empirical rule tells you 95% of the population is within 2 standard deviations of the mean, so about 5% of students (10 students) got grades higher than 84% or lower than 56%. The normal distribution is symmetrical, so we expect about 5 students in each range.
... about 5 students will have grades above 84%.
Answer: 14
Step-by-step explanation:
Since they said find the mean
You are suppose to add up all the numbers then divide it by how many numbers are there.
Answer:
Nice to hear that, congrats with practice 7.3
Answer:
The answer you're looking for is
-5r (3r^2) = -45
Step-by-step explanation:
Answer:
slope = 2
Step-by-step explanation:
slope = (y2-y1)/(x2-x1)
= (0-4)/(0-2)
= -4/-2
= 2
