What kind of study is found-observational or randomized

Reference no: EM13470633

Researchers asked a sample of 50 1^st grade teachers and a sample of 50 12^th grade teachers how much of their own money they spent on school supplies in the previous school year. They wanted to see if teachers at one grade level spend more than teachers at the other grade level.

a. What type of study is found-observational or randomized experiment? Explain.

b. What is the experimental or observational unit?

c. What is the response variable?

d. What is the explanatory variable?

e. Do we have to worry about confounding variables in this instance? Why?If so identify a possible confounding variable?

f. Are either of the terms retrospective study or prospective study relevant? Explain.

Reference no: EM13470633

Questions Cloud

Choose one of the ubuntu shells and discuss how you can : choose one of the ubuntu shells and discuss how you can perform a minimum of 20 commands or functions. these commands

Rewrite each confidence interval in terms of percents : nbspa 95 confidence interval for the proportion of women that haveever dozed off while driving is 0.07 to 0.14. for men

Each participant in study was asked to answer questions : does the use of cell phones lead to a higher incidence of brain cancer? people with brain cancer were matched with

Design a linear-time algorithm that works directly with : suppose a cs program consists of n courses. the prerequisite graph g has a vertex for each course and an edge from

What kind of study is found-observational or randomized : researchers asked a sample of 50 1stnbspgrade teachers and a sample of 50 12thnbspgrade teachers how much of their own

Cnsider the given heuristic for building an approximate : consider the following heuristic for building an approximate traveling-salesman tour assuming that the edge weights

Briefly explain suggested length of 2-3 paragraphs at least : identify which students will need to be retaught the math content.briefly describe suggested length of 2-3 paragraphs

Using information from forum compute sample mean and sample : these are the total hr from the forum in the class74nbspnbspnbspnbspnbspnbspnbsp 81nbspnbspnbspnbspnbspnbspnbsp

Recognize hardware and software required to secure your : write a 3- to 5-page paper that includes the following based on your chosen virtual organization identify hardware and

User Account

All Pages