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
Ivan
2 years ago
7

1. A study of college freshmen found that students who watched TV for more than one hour each night gained 15 pounds in the firs

t semester, compared to those who watched less than one hour. They concluded that there is an association between watching TV and weight gain in college freshmen. Which study design did they most likely use?
They most likely used an experiment with students randomly assigned to watch more than one hour or less than one hour of TV each night.

They most likely used an experiment with students randomly assigned to groups based on how much weight they gained.

They most likely used an observational study asking students to keep track of their TV habits and weight.

They most likely used an observational study asking students to keep track of their workout regimen and weight.

2. A teacher interested in determining the effect of a new computer program on learning to read conducted a study. One hundred students were randomly assigned to one of two groups. The first group used the computer program while the second group did not. Both groups were tested to determine how much their reading levels improved. The results for the two groups were compared. What kind of study is this?

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.

This is a survey because students were randomly assigned to groups.

This is a survey because a treatment was applied to both groups.
Mathematics
2 answers:
umka21 [38]2 years ago
8 0

Answer:

C.  They most likely used an observational study asking students to keep track of their TV habits and weight.

A.  This is an experiment because a treatment was applied to a group.

Step-by-step explanation:

According to our question:

1. The study concluded that there is a relation between watching TV and the weight gain in college freshmen.

Now, this is possible when a group of college students were asked to participate to watch TV for more than 1 hour for a specific amount of time and have a record of their weights.

So, the study is an observational study where the habits and weights of college students were observed.

Hence, option C is correct.

2. The students were divided onto two groups where one group used the computer program and the other did not to check the improvement in the reading levels.

This means that the students were given a procedure to follow during the study in order to see the results..

So, the study is an experiment where a treatment is applied to the group of students.

Hence, option A is correct.

madam [21]2 years ago
7 0
1.) <span>They most likely used an observational study asking students to keep track of their TV habits and weight.

2.) </span><span>This is an experiment because a treatment was applied to a group.</span>
You might be interested in
during a figure skating routine Jackie and Alex begin together and skate apart. The angle between them is 20 degrees Alex skates
sweet-ann [11.9K]
What’s the question?
7 0
3 years ago
Kate wants to buy a scarf for $22. How much will the scarf cost if she buys it in Coconut Grove?
Sonja [21]
Elaborate more on your question! Include details that we don't know.
5 0
3 years ago
A sequence is defined by the formula f(n + 1) = f(n) – 3. If f(4) = 22, what is f(1)?
julsineya [31]

f(n) = f(n+1) +3

f(1) = f(2) +3

f(2) =f(3) +3

f(3) = f(4) +3

So f(1) = f(n) + 3* (n-1)

Put n=4 here so you found

f(1) = f(4) + 3* 3

= 22 +9

=31 ans




                             hope it helps

5 0
3 years ago
Read 2 more answers
The seating capacity of a theater is 250. Tickets are $3 for children and $5 for adults. The theater must take in at least $1100
maksim [4K]

Answer:

x + y ≤

3x + 5y ≥ 1100

Step-by-step explanation:

Given:

Seating capacity of theater = 250

Cost of each child ticket = $3

Cost of each adult ticket = $5

Cost per performance = $1100 at least

Find:

System of inequalities

Computation:

Let;

x = Number of children's tickets

y = Number of adult tickets

So

x + y ≤

3x + 5y ≥ 1100

5 0
2 years ago
The cost (in dollars) of making b bracelets is represented by 4 5b. The cost (in dollars) of making b necklaces is represented b
Leviafan [203]

Answer:

$(3b+2)

Step-by-step explanation:

The cost of making b bracelets = 4+5b

The cost  of making b necklaces = 8b+6.

To determine how much more it cost to make b necklaces than b bracelets, we simply subtract.

Extra Cost = Cost of b Necklaces-Cost of b Bracelets

=(8b+6)-(4+5b)

open the brackets

=8b+6-4-5b

Collect like terms

=8b-5b+6-4

=3b+2

It costs $(3b+2) more to make b necklaces than b bracelets.

3 0
3 years ago
Other questions:
  • Whitney starts the engine on her small private airplane. The engine drives a propeller with a radius of 6.5 feet and its centerl
    13·1 answer
  • A Bernoulli random variable X has unknown success probability p. Using 100 independent samples of X, find a confidence interval
    6·1 answer
  • X+9=2 how do i do this i am confused on it
    8·1 answer
  • To make punch, Sophia mixes 2 liters of clear soda with 70 centiliters of cranberry juice and 236 milliliters of pineapple juice
    12·2 answers
  • jason is training for a marathon bike ride. His average speed increase from 3 miles per hour to 6 miles per hour in 3 months fin
    9·1 answer
  • A group of four people share 1/2 pounds of almonds how many pounds of almonds‘s as each person yet do you know equation you can
    6·2 answers
  • I WOULD LIKE THIS SOOVED WITH A BREAK DOWN<br> (5x - 4)2= 36
    11·1 answer
  • It is recommended that you work this out on graph paper to help answer the questions. Sean plots the locations of 4 places on a
    10·1 answer
  • I NEED HELP FAST ASAP PLS
    6·1 answer
  • Find the missing side of each triangle.
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!