Answer:
18.867%
Step-by-step explanation:
We solve using z score formula
z = (x-μ)/σ, where
x is the raw score = 30 hours
μ is the population mean = 24.5 hours
σ is the population standard deviation = 6.23 hours
z = 30 - 24.5 /6.23
z = 0.88283
Probability value from Z-Table:
P(x<30) = 0.81133
The percentage that a randomly selected child spends at least 30 hours each week watching television is calculated as:
At least 30 hours = 30 hours or more = ≥ 30
Hence,
P(x>30) = 1 - P(x<30)
= 1 - 0.81133
= 0.18867
Converting to percentage
0.18867 × 100
= 18.867%
The percentage that a randomly selected child spends at least 30 hours each week watching television is 18.867%
The answer is
<span>Points lie on the same line if and only if the points are collinear</span>
It says that mean of six nos is 4.7
So, that means ( no pun intended), the average of six numbers give a value of 4.7
the same goes for the average of the other four numbers=6.5
If we're talking about the mean ( average) of all the ten numbers , we usually would need the ten numbers ( their values and their frequency) , but since its already given as mean itself , we could just add up the values.
4.7+6.5=11.2
Answer:
6.8
Step-by-step explanation:
negative 2 times negative 3 is -6.
negative 2 times negative 0.4 is -0.8.
add them together :)
To solve this problem we need to know the equivalence between yards and inches, that is:
1 yd = 36 inches
Therefore in 8 yd we have:
8(36) = 288
so in 8 yd we have 288 inches
So 8 yd is equal to 288 in
