Consider the following regression output where the dependent variable is test scores and the two explanatory variables are the student-teacher ratio and the percent of english learners: modifyingabove test score with caret equals 698.9 minus 1.10 times str minus 0.650 times pctel. you are told that the t-statistic on the student-teacher ratio coefficient is 2.56. the standard error therefore is approximately: a.0.650.b.1.96.c.0.25.d.0.43.

For a school newspaper article, cienna conducted a survey to find out students’ favorite subjects. she polled all the students in mrs. lopez’s advanced dance class. why is her data likely to be skewed? honors dance students are more likely to enjoy dance than students in the general population, so dance may be overrepresented. cienna should have interviewed all the students in the school to get more accurate data. honors dance students are more likely to enjoy dance than students in the general population, so dance will be underrepresented. cienna should have interviewed only every other student in the class to avoid having too many people.

Hardest math question of all time can you solve the equation. check for extraneous solutions.9∣9-8x∣ = 2x+3

In a survey of 1015 adults, a polling agency asked, "when you retire, do you think you will have enough money to live comfortably or not. of the 1015 surveyed, 534 stated that they were worried about having enough money to live comfortably in retirement. construct a 90% confidence interval for the proportion of adults who are worried about having enough money to live comfortably in retirement.