56.30
With a calculator, press second or shift and then tan to find the degrees.
Answer:
a. There's a 95% chance that the true proportion is in the confidence interval.
Step-by-step explanation:
When we want to estimate a property of a population (a population's parameter), without surveying the population, we use samples.
Then, with the information of the samples we can calculate the statistics and infere properties about a population. This inferences obviously came with some uncertainty, depending on the properties of the sample and specially the sample size.
When we talk about confidence intervals, we use the statistic of the sample (in this case, the mean) to estimate a range of values it is expected to find the true mean of the population. The width of this interval depends on the sample standard deviation and the sample size.
The value of the confidence interval (95%, 99%, etc) represent the probabilty that the true mean is within this interval.
Answer:
31 toys
Step-by-step explanation:
What we know:
- There are 57 toys in total
- 15 are new
- 9 are Ben's favourite
- 2 are both Ben's favourite and new
Ben is not going to give away toys that are new or favourite. This means that the number of toys he <em>will not</em> give away is equal to 15+9+2.
15+9+2
= 26 toys
He has 57 toys in total, so we can find the number of toys he <em>is</em> going to give away by subtracting 26 from 57.
57-26
= 31 toys
Therefore, he will give away 31 toys.
I hope this helps!
Answer:
A.
Step-by-step explanation:
I believe it is A. because there are the numbers that equal all together to get that domain.
