Answer:
y = 4 x = -2
Step-by-step explanation:
Answer:
Between 55 and 65
Step-by-step explanation:
The Empirical Rule states that, for a normally distributed(bell-shaped) random variable:
68% of the measures are within 1 standard deviation of the mean.
95% of the measures are within 2 standard deviation of the mean.
99.7% of the measures are within 3 standard deviations of the mean.
In this problem, we have that:
Mean = 60
Standard deviation = 5
Between what two values do about 68% of the values lie?
By the Empirical Rule, within 1 one standard deviation of the mean. So from 60-5 = 55 to 60+5 = 75.
Answer:
6. 75 Students in Mrs.Reynolds class.
7. 60 Birthdays in February
8. February and May are a combined 20% of birthdays
9. March has 24% of the students birthdays
Step-by-step explanation:
6. Adding all the numbers will give us 75 total students.
7. 450 divided by 7 will get us 6. And there are 10 birthdays in February, so we do 10 times 6 and get 60.
8. On a calculator if you input 20% of 75 you will get 15. February and May are the only 2 birthday months that if you add them up you get 15.
9. If you put 24% of 75 on a calculator you will get 18. March is the only month with 18 birthdays.
