Draw a model and write an equation to represent 4 times as many as 3 is 12 explain your work
2 answers:
Answer:
The required equation is and the required model is shown in figure 1.
Step-by-step explanation:
Consider the provided information.
We need to draw a model and write an equation to represent 4 times as many as 3 is 12.
4 times as many as 3 can be written as:
This expression is equal to 12. Thus the combined equation is:
The required model is shown in figure 1:
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Answer:
The mean is 95 and the standard deviation is 2
Step-by-step explanation:
Central Limit Theorem
The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean and standard deviation
, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean
and standard deviation
.
For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.
In this question:
Population:
Mean 95, Standard deviation 12
Samples of size 36:
By the Central Limit Theorem,
Mean 95
Standard deviation
add 15 to both sides:
subtract 6x from both sides:
Both sides are equal : true for all x
Answer D
hope this helps!