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
n200080 [17]
2 years ago
12

Twenty different video games showing alcohol use were observed. The duration times of alcohol use ​(in seconds) were recorded.

Mathematics
1 answer:
Crazy boy [7]2 years ago
8 0

Answer:

Degree of freedom = 19

Step-by-step explanation:

We are given the following information in the question:

Sample size, n = 20

For a t-test hypothesis it was claimed that the population mean is greater than 89 ​second.

1) df

Df denotes the degree of freedom.

  • The Degrees of Freedom refers to the number of values involved in the calculations that have the freedom to vary.

2) Degree of freedom  = n - 1

where n is the sample size

Degree of freedom = 20 - 1 = 19

You might be interested in
What are Parallelogram markings?
Marat540 [252]

Answer:

A quadrilateral is a polygon with four sides. A parallelogram is a quadrilateral with both pairs of opposite sides parallel and congruent. ... The geometric markings shown on the rectangle below indicate parallel sides with an equal number of arrows and congruent sides indicated with an equal number of hatch (hash) marks.

Step-by-step explanation:

6 0
3 years ago
Ella has 0.5 lb of sugar. how much water should she add to make the following concentrations? Tell Ella how much syrup she will
makkiz [27]

Answer:

For 50% syrup, add 0.5 lb of water for 1 lb of syrup; for 5% syrup, add 9.5 lb of water for 10 lb of syrup; for 75% syrup, add 0.17 lb of water for 0.67 lb of syrup; for 1.5% syrup, add 32.8 lb of water for 33.3 lb of syrup.

Step-by-step explanation:

Let x represent the amount of water added.  This means the total mass of the syrup is represented by 0.5+x.

To find percentages, we divide the part by the whole.  For a 50% syrup, we need the part (sugar) compared to the whole (sugar + water) to equal 50%, or 0.50:

Multiply both sides by 0.5+x:

Using the distributive property, we have

0.5 = 0.5(0.5)+0.5(x)

0.5 = 0.25+0.5x

Subtract 0.25 from each side:

0.5-0.25 = 0.25+0.5x-0.25

0.25 = 0.5x

Divide both sides by 0.5:

0.25/0.5 = 0.5x/0.5

x = 0.5

For 50% syrup, add 0.5 lb of water.  This makes the total mass 0.5+0.5 = 1 lb.

For 5% syrup, we change the equation to equal 0.05 (5% = 5/100 = 0.05) and leave everything else the same:

Multiply both sides by 0.5+x:

Using the distributive property,

0.5 = 0.05(0.5)+0.05(x)

0.5 = 0.025 + 0.05x

Subtract 0.025 from both sides:

0.5-0.025 = 0.025+0.05x-0.025

0.475 = 0.05x

Divide both sides by 0.05:

0.475/0.05 = 0.05x/0.05

x = 9.5

For 5% syrup, add 9.5 lb of water; the total mass will be 9.5+0.5 = 10 lb.

For 75% syrup, set the equation equal to 0.75:

Using the distributive property,

0.5 = 0.75(0.5)+0.75(x)

0.5 = 0.375 + 0.75x

Subtract 0.375 from each side:

0.5 - 0.375 = 0.375 + 0.75x - 0.375

0.125 = 0.75x

Divide both sides by 0.75:

0.125/0.75 = 0.75x/0.75

0.17 = x

For 75% syrup, add 0.17 lb of water; the total mass is 0.17+0.5 = 0.67 lb.

For 1.5% syrup, set the equation equal to 0.015:

Using the distributive property,

0.5 = 0.015(0.5) + 0.015(x)

0.5 = 0.0075 + 0.015x

Subtract 0.0075 from each side:

0.5-0.0075 = 0.0075 + 0.015x - 0.0075

0.4925 = 0.015x

Divide both sides by 0.015:

0.4925/0.015 = 0.015x/0.015

32.8 = x

For 1.5% syrup, use 32.8 lb of water; the total mass is 32.8+0.5 = 33.3 lb.

I hope this is right and have a good day

3 0
2 years ago
Read 2 more answers
A STATE PRIZE PAYS $1000 weekly for 15 years.
Doss [256]

Answer:

b

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
PLLLLLEASE I NEED HELP SO BADLY PLEASE ASAP PLEASE PLEASE T_T
olchik [2.2K]

Answer:

x^2+7x-8-\frac{3}{x-7}

Step-by-step explanation:

I think this question is a bit hard to explain by typing, so I'll add an image down below.  

I used long division for this question, and the final answer is: x^2+7x-8-\frac{3}{x-7}

4 0
1 year ago
How do you do equations with fractions?
kramer
For example, x/2 - x/3 = 1 => (3x)/6 - (2x)/6 = 6/6 => 3x - 2x = 6 => x = 6;
3 0
3 years ago
Read 2 more answers
Other questions:
  • What's the answer to tripling the greater of the two consecutive even integers gives the same result as subtracting 10 from the
    14·1 answer
  • What is the area of this figure?
    6·2 answers
  • How to use the GCF and the distributive property of 40+ 50
    11·1 answer
  • Which statement is true regarding the graphed
    9·1 answer
  • What is the equation of the graph ?
    9·1 answer
  • A factory produces 1, 250, 000 toys each year. The number of toys is expected to increase by about 150% per year. Which model ca
    12·1 answer
  • You are choosing a card from a standard deck of cards. The probability of a red card is 1 2 . The probability of a heart is 1 4
    15·1 answer
  • Si un vendedor gana $ 450 por cada venta de $ 50 000, ¿cuál es su tasa de comisión?​
    11·1 answer
  • Which expression represents the difference of (5x-3y) and (8x+8y)?
    9·1 answer
  • Pls help me!!! <br><br> Pls work out k
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!