1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
katen-ka-za [31]
3 years ago
11

A treatment is administered to a sample of n = 9 individuals selected from a population with a mean of m = 80 and a standard dev

iation of s = 12. after treatment, the effect size is measured by computing cohen's d, and a value of d = 0.50 is obtained. based on this information, what is the mean for the treated sample?
Mathematics
1 answer:
kupik [55]3 years ago
5 0
Cohen's d is calculated according to the formula:
d = (mean difference) / standard deviation
0.5 = mean difference / 12
Therefore, mean difference = 6
Since we have a population mean of 80, the sample mean must be 80 + 6 = 86.
You might be interested in
Sally can paint a room in 9 hours while it takes Steve 3 hours to paint the same room. How long would it take them to paint the
Archy [21]
You can solve this one by adding their rates, but you have to invert the numbers they give you to find the rate. Rate is measured in something per unit of time, and "per" indicates division. So the rates are: 1/3 of an hour (Sally) and 1/6 of an hour (Steve). So add the rates: 1/3 + 1/6 = 1/2. (1/3 is 2/6, and 2/6 + 1/6 = 3/6). Since their combined rate is 1/2 of a room in one hour, it takes them two hours to paint the room.

This answer makes sense: It takes Sally three hours by herself; with Steve's help, she's faster, but not THAT much faster, because he's pretty slow. You can often spot-check word problem answers like this by giving it a common sense once-over. If we came up with four hours, that would clearly be wrong: it should take her LONGER if she's getting help.
7 0
3 years ago
Read 2 more answers
HELPPP DUE IN 10 more min PlEaSe NO LINKS!
kap26 [50]
9-4 and 9+(-4) I believe
7 0
2 years ago
A box contains 95 pink rubber bands and 90 brown rubber bands. You select a rubber band at random from the box. Find each probab
vivado [14]

Answer:A. The theoretical probability for pink is 95/185 or about 51.35%

B. The theoretical probability for brown is 90/185 or about 47.82%.

C. To find the experimental probability, we will make another fraction. The number of outcomes will be the numerator and the total will be the denominator.

Pink  36/69 = 52.17%

Brown  33/69 = 47.82%

Step-by-step explanation:

4 0
3 years ago
.................................................6y=8x
frez [133]

Answer: look at the picture

Step-by-step explanation: Hope this help :D

8 0
2 years ago
Which must be true?
dezoksy [38]

Answer:

i think its  C

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Other questions:
  • Stefan is measuring the angles of a triangle. He measures the first angle and gets a measure of 90°. What does he know about the
    13·2 answers
  • The ratio of red cars to blue cars in a parking lot was 5:3 . If there was 40 red cars , how many blue cars were there ?
    14·1 answer
  • Help please! Thanks
    5·1 answer
  • Jacob went on a fishing trip. This year he caught 30 fish, which is six more than twice the number he caught last year. How many
    15·1 answer
  • HALP AND YOU GET CANDY THE PICTURE BELOW IS YOUR KEY TO CANDY (BRAINLIST)
    15·2 answers
  • Please answer fast ASAP I give brainliest
    5·1 answer
  • Kristi invests $3,000 at a 7.25% annual simple interest rate, and her sister Kari invests $3,200 at a 6.25% annual simple intere
    14·1 answer
  • Hallar la ecuación de la recta que pasa por el punto P(-3,-1) y por el punto de intersección de las rectas 2x − y = 9 y 3x − 7y
    11·1 answer
  • Please help; algebra 2
    10·1 answer
  • Abby, Bernardo, Carl, and Debra play a game in which each of them starts with four coins. The game consists of four rounds. In e
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!