Question

1- The margin of error used in a confidence interval is found by ________. A- multiplying the standard error and z?/. 2B- multiplying the population standard deviation and the sample size. C- dividing the population standard deviation by the sample size. D- multiplying the level of confidence and the standard error. Which one is correct

2-

To determine whether a linear relationship exists between variables, a ________ can be used.

bar chart

pie chart

scatter chart

stacked column chart

3- Discrete data are usually easier to capture and record, but provide less information than continuous data. Is T or F?

4-

There are four slices of pepperoni pizza and three slices of veggie pizza sitting on the counter. What is the probability of randomly choosing a slice of veggie pizza?

	A.	4/7
	B.	1/3
	C.	3/7
	D.	3/4

Answer 1

Answer 1

we know that the formula for the confidence interval is

CI =

where is Standard error and is the z score corresponding to the confidence level

and the product of and is known as the Margin of error

so, we can say that the margin of error is the product of standard error and z score corresponding to given confidence level.

Option A is matching to our conditons

so, only option A is correct

option B is incorrect because margin of error is not the product of population standard deviation and sample size

option C is incorrect because the margin of error is not the division of  population standard deviation and sample size

Option D is incorrect because the margin of error is not equal to the product of level of confidence and standard error

A is correct answer