![vivianni0727p1y30v](/avatars/47525.jpg)
vivianni0727p1y30v
22.01.2020 •
Mathematics
Suppose that you are asked to conduct a study to determine whether smaller class
sizes lead to improved student performance of fourth graders.
a. if you could conduct any experiment you want, what would you do? be
specific.
b. more realistically, suppose you can collect observational data on several
thousand fourth graders in a given state. you can obtain the size of their
fourth grade class and a standardized test score taken at the end of fourth
grade. why might you expect a negative correlation between class size
and test score?
c. would a negative correlation necessarily show that a smaller class size
cause better performance? explain.
Solved
Show answers
More tips
- H Health and Medicine How to Choose the Right Tanning Cream?...
- C Computers and Internet How to Download Movies from Torrents?...
- S Style and Beauty How to Sew Harem Pants?...
- C Computers and Internet Е-head: How it Simplifies Life for Users?...
- F Family and Home How to Choose the Best Diapers for Your Baby?...
- F Family and Home Parquet or laminate, which is better?...
- L Leisure and Entertainment How to Properly Wind Fishing Line onto a Reel?...
- L Leisure and Entertainment How to Make a Paper Boat in Simple Steps...
- T Travel and tourism Maldives Adventures: What is the Best Season to Visit the Luxurious Beaches?...
- H Health and Medicine Kinesiology: What is it and How Does it Work?...
Answers on questions: Mathematics
- M Mathematics Find the difference between -14w - 3 and 5w. -9 w - 3 -19 w + 3 -19 w - 3 -22 w...
- M Mathematics Asap! dont comment if you dont know! jack drove 278.2 miles on 19.6 gallons of gasoline. about how many miles did he drive per gallon of gasoline? (round your answer to...
- M Mathematics 4, 12, 20 what the common diffrence? ? im timed...
- M Mathematics Blank dvds are sold in packages of 50 for $17.95. if your company will need 2,700 blank dvds next year, how much money must you budget for blank dvds?...
- M Mathematics What is the domain of the exponential function shown below? f(x) = 3• (1/4)^x a. x 0 b. all real numbers except 3 c. x 0 d. all real numbers...
- M Mathematics Abag contains three red balls, two green balls, and one blue ball. if a red ball is pulled out on the first draw, the probability of pulling a red ball again on the second...
- M Mathematics Wuts 4x +6x= pl me im in 4th grade...
- M Mathematics What is 5% interest added to $750...
- M Mathematics Me figure out the first part of this...
- M Mathematics the expression below shows a number in expanded form. what is the standard form of the number? (2 x 10) + (3 x 1/10+ (9 x 1/100) + (7 x 1/1,000)...
Ответ:
a. correlation
b. inverse linear correlation exists If the higher the population of students lead to a decrease in test score,
c. yes
Step-by-step explanation:
a. Correlation is a measure of the amount of association existing between two variables.
b. For linear correlation, if points are plotted on a graph and all the points lie on a straight line, then perfect linear correlation is said to exist. When a straight line having a positive gradient can reasonably be drawn through points on a graph positive or direct linear correlation exists,
Similarly,when a straight line having a negative gradient can reasonably be drawn through points on a graph, negative or inverse linear correlation exists,
The results of this determination give values of r lying between +1 and −1, where +1 indicates perfect direct Positive linear correlation and −1 indicates perfect inverse correlation or Negative linear correlation and 0 indicates that no correlation exists.
If the higher the population of students lead to a decrease in test score, there will definitely be a negative correlation between class size and test score. i.e low class size result in high test score which consequently lead to high performance.
c. YES
A negative correlation means low class size result in high test score which consequently lead to better performance.
Ответ:
there is no figure
Step-by-step explanation: