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
Airida [17]
3 years ago
5

A comprehension test was given to students after they had studied text book material either in silence or with the television tu

rned on? what is the independent variable and the dependent variable.
Mathematics
1 answer:
Natali5045456 [20]3 years ago
6 0
The independent variable is the study environment.  This is because that's what's being changed in the experiment to determine something else.  The dependent variable is how we're measuring results.  Therefore, in this experiment, it's the result of the comprehension test.
You might be interested in
A 6th grade football team played six games and scored 17, 14, 30, 24, 21, and 14 points. In their seventh game,
zheka24 [161]

Answer:

a. Mean

a. 79 points is an outlier, and the mean is most responsive to outliers.

Step-by-step explanation:

17, 14, 30, 24, 21, and 14

Let's calculate the measure of central tendency of the numbers first.

Mean = 120/6

Mean = 20

For Median

Let's arrange the numbers in ascending order

14,14,17,21,24,30

The median is 17 and 21

Median value =( 17+21)/2

Median = 38/2

Median = 19

Mode = 14.

After 79 was added.

Mean =( 120+79)/7

Mean = 199/7

28.43

For Median

14,14,17,21,24,30,79

Median= 21

Mode = 14

The value that changed the most was the mean value.

7 0
2 years ago
Here are summary statistics for randomly selected weights of newborn​ girls: nequals=174174​, x overbarxequals=30.930.9 ​hg, seq
MaRussiya [10]

Answer:

The 95% confidence interval would be given by (29.780;32.020)  

Step-by-step explanation:

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

\bar X=30.9 represent the sample mean for the sample  

\mu population mean (variable of interest)

s=7.5 represent the sample standard deviation

n=174 represent the sample size  

The confidence interval for the mean is given by the following formula:

\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}   (1)

In order to calculate the critical value t_{\alpha/2} we need to find first the degrees of freedom, given by:

df=n-1=174-1=173

Since the Confidence is 0.95 or 95%, the value of \alpha=0.05 and \alpha/2 =0.025, and we can use excel, a calculator or a tabel to find the critical value. The excel command would be: "=-T.INV(0.025,173)".And we see that t_{\alpha/2}=1.97, this value is similar to the obtained with the normal standard distribution since the sample size is large to approximate the t distribution with the normal distribution.  

Now we have everything in order to replace into formula (1):

30.9-1.97\frac{7.5}{\sqrt{174}}=29.780    

30.9+1.97\frac{7.5}{\sqrt{174}}=32.020

So on this case the 95% confidence interval would be given by (29.780;32.020)    

The value 29.6 is not contained on the interval calculated.

5 0
3 years ago
Which of the following illustrate the commutative property? select all that apply
Genrish500 [490]

For this case we have that the commutative property establishes that the order of the factors does not alter the product. Example:

5 * 6 = 6 * 5\\4 + 3 = 3 + 4

Then we have the following options illustrate the property:

3 + 4 + 6 = 3 + 6 + 4 = 13\\9 * 2 * 7 = 7 * 9 * 2 = 126\\2 + 3 + 1 = 3 + 1 + 2 = 6\\5 + 2-4 = 5-4 + 2 = 3

It is necessary to emphasize that option b illustrates the associative property and in option c equality is not fulfilled

Answer:

Option A, D, E, F

4 0
2 years ago
Solve 2x+6 ≤ 10 or 2x + 8 > 20.
Firlakuza [10]

Answer:

<h2>A. x ≤2 or x>6</h2>

Step-by-step explanation:

2x+6 ≤ 10  or  2x + 8 > 20

⇔ 2x ≤ 4  or  2x > 12

⇔ x ≤ 2  or  x > 6

6 0
2 years ago
Jensen is building a snow fort. Each block in the fort weighs about 1 kilogram. Jensen hopes to make about 40 blocks for the for
babymother [125]

Answer: 13,333 snowflakes

Step-by-step explanation:

For this exercise let be "x" represents the number of snowflakes that will be in the fort.

According to the information given in the exercise, the weight of one block is 1 kilogram. Knowing that the fort must have 40 blocks, the total weight is:

total\ weight=(1\ g)(40)\\\\total\ weight=40\ g

 Since each snowflake weighs 3* 10^{-3} grams, need to divide the total weight calculated above by the weight of a snowfake.

Therefore, through this procedure you get the following result:

x=\frac{40\ grams}{3 * 10 ^{-3}\ grams}\\\\x\approx13,333

Therefore, the there will be 13,333 snowflakes in the fort.

5 0
3 years ago
Other questions:
  • Please help with math!
    8·2 answers
  • What's the result of: (2/3)³ ​
    11·1 answer
  • What is the value of 9x - 4y if x = 3 and y = 2​
    15·2 answers
  • 1) An online store has the following advertisement on there homepage.
    12·1 answer
  • Help plz show work<br> assig 8
    9·2 answers
  • If 6 families share 20 pounds of ham, between what two whole numbers will each family share
    12·1 answer
  • 15 POINTS PLEASE HELP
    15·1 answer
  • Which graph represents the solution to this system of inequalities:
    12·1 answer
  • Please do number 11 for me.
    5·1 answer
  • CAN SOMEONE PLEASE HELP ME
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!