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
cricket20 [7]
3 years ago
12

The mean crying time of infants during naptime at a local preschool is 12 mins. The school implements a new naptime routine in 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:
love history [14]3 years ago
7 0

Answer:

Step-by-step explanatio n: ummmoirnd iehcn

You might be interested in
2000 soldiers stand in a row. Beginning from the left, each soldier calls out a number, 1, 2, 3, 1, 2, 3, 1, 2, 3, 1, 2, 3, and
Cloud [144]

Answer:

The number of soldiers that call out a number 3 is 666 soldiers

Step-by-step explanation:

The parameters given are;

Number of soldiers = 2000

Soldiers calling from the left = 1, 2, 3,.....

Soldiers calling from the right = 1, 2, 3,.....

Therefore, since the number soldiers calling out the number 3 are 1 in 3 from the left and 1 in 3 from the right, we split the soldiers into 2 groups of 1000, with one group calling from left and the other group calling from the right;

The number of 3s in called out in the first group from the left is therefore;

1000/3 = 333.33 which is 333 soldiers  or from the 3rd soldier to the 999th soldier

Similarly the number of 3s called out from the second group = 333

Hence the total number of soldiers that call out a number 3 = 333 + 333 = 666 soldiers.

8 0
3 years ago
A gas pump measures volume of gas to the nearest 0.01 gallon. Which measurement shows an appropriate level of precision for the
PSYCHO15rus [73]

Answer:

12.3 Gallons

Step-by-step explanation:

Options of the question:-

Option A. 12.33 gallons

Option B. 10 gallons

Option C. 12 gallons

Option D. 12.3 gallons

Option D is the answer :-

As the least count or zero error is 0.1 so it can measure only upto one decimal place so answer will be 12.3

5 0
3 years ago
tyrone opens an account at the local bank by depositing $50 of his birthday money. He continues to deposit $50 each month for 5
Pavel [41]

<u>Answer-</u>

<em>The amount will be </em><em>$8944.62</em><em> after 5 years.</em>

<u>Solution-</u>

We know that,

\text{FV of annuity}=P[\dfrac{(1+r)^n-1}{r}]

Where,

P = Payment = $50 monthly

r = rate of interest compounded monthly= 3\frac{1}{4}=3.25\%=0.0325

n = number of period = 5 years = 5×12 = 60 months

Putting the values in the formula,

\text{FV of annuity}=50[\dfrac{(1+0.0325)^{60}-1}{0.0325}]

=50[\dfrac{(1.0325)^{60}-1}{0.0325}]

=50[\dfrac{6.8140-1}{0.0325}]

=50[\dfrac{5.8140}{0.0325}]

=50\times 178.8923

=8944.62

Therefore, the amount will be $8944.62 after 5 years.

5 0
3 years ago
Find the measure of each angle indicated. Plz
PSYCHO15rus [73]

Answer:

55degrees

Step-by-step explanation:

6 0
3 years ago
A confidence interval is constructed to estimate the value of.
barxatty [35]
Mean of your estimate
4 0
2 years ago
Other questions:
  • May someone please help me with number 18 and 19?
    10·1 answer
  • Please help!
    14·2 answers
  • Could someone help me with this question? Man why am I stupid
    6·1 answer
  • (15,-9) is dilated by a scale factor of 3 what is its new location
    13·1 answer
  • Whats the formula for compound shapes ?
    11·2 answers
  • Vince has a rectangular rug in his room with an area of 10 ft the length of the rug is 18 inches longer than the width what coul
    10·1 answer
  • <img src="https://tex.z-dn.net/?f=%5Cfrac%7Bx%7D%7B2%7D" id="TexFormula1" title="\frac{x}{2}" alt="\frac{x}{2}" align="absmiddle
    6·2 answers
  • Lol I am having an exam ....no but help
    9·1 answer
  • Dallas was told to run around the perimeter of the high
    5·1 answer
  • Algebra:
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!