answer.
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
solong [7]
2 years ago
7

A research group interested in understanding the effect of listening to classical music on learning mathematics conducted a stud

y. One hundred students were randomly assigned to one of two groups. The first group listened to classical music as they learned a new lesson. The second group learned the same lesson with no music playing. Both groups were tested on the new material to determine how much they learned. The results for the two groups were compared. What kind of study is this?
This is an observational study because students were randomly assigned to groups.
This is an observational study because a treatment was applied to both groups.
This is an experiment because a treatment was applied to a group.
This is an experiment because students were able to choose which group to join.
Mathematics
1 answer:
GalinKa [24]2 years ago
4 0
First of all, this is not an observational study, but an experiment, since we have two groups and one of the two groups is manipulated or treated. In an observational study the subjects are only observed.
 
Second, the students did not choose their groups - so we can't choose the last answer.

Therefore the correct answer is:
This is an experiment because a treatment was applied to a group.

You might be interested in
If (a^3+27)=(a+3)(a^2+ma+9) then m equals
Ronch [10]

Answer:

m = - 3

Step-by-step explanation:

a³ + 27 ← is a sum of cubes and factors in general as

a³ + b³ = (a + b)(a² - ab + b²), thus

a³ + 27

= a³ + 3³

= (a + 3)(a² - 3a + 9)

comparing a² - 3a + 9 to a² + ma + 9, then

m = - 3

7 0
2 years ago
A side of a regular six - sided polygon is 8cm long. The perimeter of a similar polygon is 60cm. What is the length of a side of
Lerok [7]

Answer:

  10 cm

Step-by-step explanation:

The larger polygon is also a regular 6-sided polygon, so each side is 1/6 of the perimeter length:

  (60 cm)/6 = 10 cm . . . length of a side

4 0
2 years ago
The quadratic function y = -10x2 + 160x - 430 models a store's daily profit (y), in dollars, for selling T-shirts priced at x do
alexdok [17]

Answer:

D,B,C,A

Step-by-step explanation:

Look at the picture

:)

8 0
1 year ago
Which point is a solution of x + 2y ≤ 4?
SVEN [57.7K]
(1,1) because x + 2y <4
   =1 + 2(1)
   = 3 which is less than 4
4 0
2 years ago
Read 2 more answers
Twenty percent of what number is equal to five percent of 680
jolli1 [7]

Answer:

170

Step-by-step explanation:

5/100 ×680

=34

20%=34what about 100%=?

(100×34)÷20

170

8 0
2 years ago
Other questions:
  • Write down a pair of integers whose
    6·1 answer
  • For dinner, Abelita chooses the Italian salad that costs $3.99 before tax, and Franco chooses the fettuccini alfredo that costs
    14·2 answers
  • A cold tablet contains the following amounts of active ingredients: acetaminophen 325 mg, chlorpheniramine maleate 2 mg, and dex
    10·1 answer
  • Students in a statistics class are conducting a survey to estimate the mean number of units students at their college are enroll
    6·1 answer
  • Ron drove his car every day from Monday to Saturday.On Monday and Tuesday,the car used an average of 2 gallons of gas each day.
    12·2 answers
  • A track coach records three sprinters' statistics throughout the season. The median 400-meter race time, in seconds, and the int
    10·1 answer
  • The point (Negative StartFraction StartRoot 2 EndRoot Over 2 EndFraction, StartFraction StartRoot 2 EndRoot Over 2 EndFraction)
    15·2 answers
  • A pile of 55 coins consisting of nickels and dimes is worth $3.90 . Find the number of each.
    14·1 answer
  • Find the median, first quartile, third quartile, interquartile range, and any outliers for each set of data. 111, 68, 93, 88, 74
    13·1 answer
  • 1) if we add ____ to 194562 then it is divisible by 5 and 10 both
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!