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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

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Solve the formula A=12bh for h when A=90 and b=15. Write the answer in decimal form.
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Hector had y dollars in his savings account. He made a deposit of twenty-dollar bills and dollar coins. He had four times as man
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Find the distance between (4,6) and (-2, -2)
Nataly [62]

Answer:

\displaystyle d = 10

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

<u>Algebra II</u>

  • Distance Formula: \displaystyle d = \sqrt{(x_2-x_1)^2+(y_2-y_1)^2}

Step-by-step explanation:

<u>Step 1: Define</u>

Point (4, 6)

Point (-2, -2)

<u>Step 2: Find distance </u><em><u>d</u></em>

Simply plug in the 2 coordinates into the distance formula to find distance <em>d</em>

  1. Substitute [DF]:                     \displaystyle d = \sqrt{(-2-4)^2+(-2-6)^2}
  2. Subtract:                                \displaystyle d = \sqrt{(-6)^2+(-8)^2}
  3. Exponents:                            \displaystyle d = \sqrt{36+64}
  4. Add:                                       \displaystyle d = \sqrt{100}
  5. Evaluate:                               \displaystyle d = 10
8 0
2 years ago
Read 2 more answers
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