Answer:
35 days
Step-by-step explanation:
All you need to do is find a fraction that is proportional to the first, with a denominator of 49:
So you all you do is move the 49 to the other side of the equation. How do you do this? Multiply both sides by 49 (cross multiply):
So Teddy will work 35 days out of 49 days.
The average speed of the family during their walk will be 1.4 km per hour.
<h3>What is the average speed?</h3>
The overall distance the object covers in a given amount of time is its average speed. A scalar value represents the average speed. Its unit is a meter per second or Km per hour.
Given that over a 1.35-hour period of time, a family walk 0.75 km, stop to talk to the neighbor, and then walk another 1.15 km before reaching their destination.
The average speed will be calculated as:-
Average speed = Total distance / Total time
Average speed = ( 1.15 + 0.75 ) / 1.25
Average speed = 1.4 km per hour.
Therefore, the average speed of the family during their walk will be 1.4 km per hour.
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Answer:
The sampling distribution of sample proportion is approximately normal, with mean 0.62 and standard deviation 0.0485.
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.
For a proportion p in a sample of size n, the sampling distribution of the sample proportion will be approximately normal with mean and standard deviation
62% of those people get some relief from taking ibuprofen (true proportion).
This means that
Sample of 100
This means that
A. (4 pts.) Determine the sampling distribution of sample proportion. Also, find the mean and standard deviation of the sampling distribution.
By the Central Limit Theorem, it is approximately normal with
Mean
Standard deviation
Answer:
Step-by-step explanation:
Consider polynomial
If x=-2 is its zero, then you can divide the polynomial by and get
If x=-1, then the polynomial can be rewritten as
The quadratic polynomial has roots
Then the polynomial has zeros