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
quester [9]
3 years ago
15

The mean crying time of infants during naptime at a local preschool is 12 minutes. The school implements a new naptime routine i

n a sample of 25 infants and records an average crying time of 8 ± 4.6 (M ± SD) minutes. Test whether this new naptime routine reduced crying time at a 0.05 level of significance.
A) The new naptime routine significantly reduced crying time, t(24) = ?4.35, p <0.05.

B) The new naptime routine did not reduce crying time, t(24) = ?4.35, p < 0.05.

C) The new naptime routine did not reduce crying time, t(24) = 0.92, p > 0.05.

D) The new naptime routine significantly reduce crying time, t(24) = 0.92, p < 0.05.
Mathematics
1 answer:
Pie3 years ago
3 0

Answer:

Step-by-step explanation:

Diadem

You might be interested in
D · 24 = -12<br> What does d equal?
Darya [45]

Answer: d=-1/2

<u>Move all terms to the left</u>

<u></u>d*24-(-12)=0<u></u>

<u></u>

<u>Add all the numbers together, and all the variables</u>

<u></u>d*24+12=0<u></u>

<u></u>

<u>Multiply elements</u>

<u></u>24d+12=0<u></u>

<u></u>

<u>Move all terms containing d to the left, all other terms to the right</u>

<u></u>24d=-12\\-12/24\\d=-1/2<u></u>

4 0
3 years ago
Read 2 more answers
I need help with this question
inn [45]

Answer:

the answer is 18

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
I don't understand this question at all please help if you do
lorasvet [3.4K]

Answer:

Answer is \frac{4}{3}

Step-by-step explanation:

To find the interval of x. Use our equations to equal each other.

-x^2+2x=y,y=0

-x^2+2x=0\\-x(x-2)=0\\-x=0 , (x-2)=0\\x=0 ,2

\int\limits^2_0 {-x^2+2x} \, dx

Integrate.

\frac{-x^3}{3}+x^2\\(\frac{-2^3}{3}+2^2)-[\frac{-0^3}{3}+0^2]\\-\frac{8}{3} +4-0\\-\frac{8}{3}+\frac{12}{3}  =4/3

Using Desmos I have Graphs of both of the equations you have provided. The problem asks us to find the shaded region between those curves/equations.

Proof Check your interval of x.

7 0
2 years ago
Please help quickly! (:
tekilochka [14]
Congruent angles (: this means that BGE+30=90!(: So... BGE=60. so you can go over the axis. it's equal to the mirrored angle
6 0
3 years ago
PLEASE SHOW WORK A coffee distributor needs to mix a(n) Gualtemala Antigua coffee blend that normally sells for $10.30 per pound
Katarina [22]

Answer:

23 pounds of the Gualtemala Antigua Blend and 37 pounds of the Tanzanian Blend

Step-by-step explanation:

you need to make a system of equations to solve this.

First lets make x be the pounds of Gualtemala Antigua coffee blend and y the pounds of Tanzanian coffee blend

we know we need 60 pounds total so first equation is

x+y=60

Next we will make an equation based on the money information

10.30x + 13.80y = 12.46(60)

10.30x + 13.80y = 747.60

So our system of equations is

x + y = 60

10.30x + 13.80y = 747.60

I will solve this by using substitution. first rewrite x+y=60 to y=60-x

now i can substitute that into the other equation for y and solve for x

10.30x + 13.80(60-x) = 747.60

10.30x + 828 -13.80x = 747.60

-3.5x + 828 = 747.60

-3.5x = -80.4

x = 23  (rounded from 22.9714 since they requested that)

now I can use this solution to solve for y by plugging into one of the original equations

x + y =60

23 + y =60

y = 37

Finally we can say that they must mix 23 pounds of the Gualtemala Antigua Blend and 37 pounds of the Tanzanian Blend.

5 0
3 years ago
Other questions:
  • Click an item in the list or group of pictures at the bottom of the problem and, holding the button down, drag it into the corre
    12·1 answer
  • What is the greatest common factor of 12t3+30t2+48t
    10·1 answer
  • Zoey found that box of dog food was left in the pantry. She shared this food equally among her 4 dogs. What fraction of the full
    13·2 answers
  • Volume scale factor, help needed.
    11·1 answer
  • Someone please explain... I’m not sure how to do this
    5·1 answer
  • Help? anything will help thanks
    10·1 answer
  • The temperture outside dropped 13 degrees in 7 hours the final temperture was -2 degrees what was the starting temperture?
    15·2 answers
  • 6^-2 = PLEASE HELP .....................................................................
    11·2 answers
  • Calculate the following
    13·1 answer
  • If the selling price of a home is $505,000 with a 15% down payment, what is the amount of the down payment?$75,000$75,500$75,750
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!