Answer:
a) 320 students
b) 25 students
Step-by-step explanation:
Number of 18-years old in the survey:
(We add all frequency points for each line)
0 + 30 + 20 + 60 + 70 + 40 + 60 + 40 + 0 = 320 students
Number of 18 year old spending between 25 and 35 minutes: 40 + 65 = 105
Number of 12 year old spending between 25 and 35 minutes: 30 + 50 = 80
105 - 80 = 25 students
Answer:
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Answer:
x = 3, y = 3
Step-by-step explanation:
x = -5x -18
5x + 18 = -x
6x + 18 = 0
6x = 18
x = 3
Only the first one is a function
functions can’t have more than one of the same x value
Answer:
We are required to find the proportion of observations from a normal distribution that are greater than 1.36. Mathematically, it can be written as:
To find this proportion, we can use the standard normal table. Using the standard normal table, we have:
Therefore, the proportion of observations from a standard normal distribution that take values greater than 1.36 is 0.0869.
