There are three balls for 40 cents or six balls for 60 cents. What percent dose he save by buying one set of six ball instead of
1 answer:
Answer:
The persons saves 25% by buying one set of six ball instead of two sets of three balls.
Step-by-step explanation:
Cost of 1 set of three balls = 40 cents
Cost of 2 sets of three balls = 40 cents × 2 = 80 cents
Cost of 1 set of six balls = 60 cents
Percent dose he save by buying one set of six ball instead of two sets of three balls :
=
The persons saves 25% by buying one set of six ball instead of two sets of three balls.
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Using the z-distribution, a sample of 142,282 should be taken, which is not practical as it is too large of a sample.
<h3>What is a z-distribution confidence interval?</h3>The confidence interval is:
The margin of error is:
In which:
is the sample mean.
- z is the critical value.
- n is the sample size.
is the standard deviation for the population.
Assuming an uniform distribution, the standard deviation is given by:
In this problem, we have a 95% confidence level, hence, z is the value of Z that has a p-value of
, so the critical value is z = 1.96.
The sample size is found solving for n when the margin of error is of M = 0.006, hence:
n = 142,282.
A sample of 142,282 should be taken, which is not practical as it is too large of a sample.
More can be learned about the z-distribution at brainly.com/question/25890103
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So the -4x is the M and then 6 is the B. So m is the slope and B is the y-intercept. The 6 goes on the y axis and the -4 will be how the line looks. It’ll be rise (-4) over run (1).
