10. Suppose you increase the sample size and keep everything else the same. What happens to the margin of error?

7. Find the z-score that cuts off a left tail whose area is 2.5%. 8. Find the z-score that cuts off a right tail whose area is 10.75%.

Determine whether the sampling is dependent or independent. Indicate whether the response variable is qualitative or quantitative.A psychologist wants to measure the effect of music on memory. He randomly selects 80 students and measures their scores on a memory test conducted in silence. The next day he measures their scores on a similar test conducted while classical music is playing. The mean score without music is compared to the mean score with music. Group of answer choices   a.quantitative, dependent b.qualitative, independent c.qualitative, dependent d.quantitative, independent

−15,3,3,−15,1,−15,3 Calculate the value of the sample variance. Round your answer to one decimal place.

cant figure out where im going wrong .

The IQR represents the spread of the middle 50% of the data.  Do you think the IQR in this problem is large or small?  Here is the data. 0, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 5, 5, 6, 7, 13, 14 Median is 3. Min # is 0 Max # is 14 Q1 is 2 Q2 is 3 Q3 is 4 IQR=Q3 (4)-Q1(2) IQR=2

Consider sample data with x = 39 and s = 4.Compute the coefficient of variation. Round to two decimal places. ?%

Don't hand writing solution.

☐True ☐False The difference between the sample and the population being estimated is called the sampling error