Find the missing numerator to make the following sentence true: 4/5 + ?/5 = 22/15

What values of data might affect the statistical measures of spread and center

The graph of a line gets what as the value of the slope gets bigger

Describe in detail how you would construct a 95% confidence interval for a set of 30 data points whose mean is 20 and population standard deviation is 3. be sure to show that you know the formula and how to plug into it. also, clearly state the margin of error.