I don't know how to solve this 2/4 + 3/8=?
2 answers:
Answer: or 0.875 in decimal form.
Step-by-step explanation:
Okay, so to solve this, the easiest method is to find a common denominator. While we could try using trial and error or if you know your tables really well, I don't so we will just multiply the denominators which is 8 and 4. We then multiply 8 and 4 which is 32.
To convert the fractions we have, we multiply both the numerator and denominator of each, by the multiple that multiplies the denominator to 32.
multiply both 4 and 2 by 8. Now we have
.
Same thing with the second number. We have . We multiply both the numerator and the denominator by 4. 3*4 is 12, 8*4 is 32.
Now we have .
Now that both fractions have common denominators, we can add the numerators.
Now we have the answer, , but is that it?
No. Now to find the final two answers, we simply .
To simplify, we find the Greatest Common Factor of 28 and 32, which in this case happens to be 4. This is the highest number that either of those can be divided by to provide a normal whole number
After solving
That is our final answer. .
If necessary, you can convert it to decimal form through simple division and end up with 0.875.
You might be interested in
Answer:
a) Going to public places like restaurants, parks, theaters, etc in Madison and asking voters.
b) The 80% CI to estimate the true proportion of registered voters in the City of Madison who vote in non-presidential elections is (0.5533, 0.6667).
c) We are 80% sure that our confidence interval contains the true proportion of registered voters in the City of Madison who vote in non-presidential elections.
d) The lower limit of the interval is higher than 0.5. This means that it does seem that MORE than half of registered voters in the City of Madison vote in non-presidential elections.
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of , and a confidence interval
, we have the following confidence interval of proportions.
In which
Z is the zscore that has a pvalue of .
(a) How might a simple random sample have been gathered?
Going to public places like restaurants, parks, theaters, etc in Madison and asking voters.
(b) Construct an 80% CI to estimate the true proportion of registered voters in the City of Madison who vote in non-presidential elections.
You take an SRS of 200 registered voters in the City of Madison, and discover that 122 of them voted in the last non-presidential election. This means that .
We want to build an 80% CI, so , z is the value of Z that has a pvalue of
.
The lower limit of this interval is:
The upper limit of this interval is:
The 80% CI to estimate the true proportion of registered voters in the City of Madison who vote in non-presidential elections is (0.5533, 0.6667).
(c) Interpret the interval you created in part (b).
We are 80% sure that our confidence interval contains the true proportion of registered voters in the City of Madison who vote in non-presidential elections.
(d) Based on your CI, does it seem that fewer than half of registered voters in the City of Madison vote in non-presidential elections? Explain.
The lower limit of the interval is higher than 0.5. This means that it does seem that MORE than half of registered voters in the City of Madison vote in non-presidential elections.