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jenyasd209 [6]
3 years ago
6

Lauren always wakes up when the sun starts to shine into her bedroom window. Everyone in the house knows when she wakes up becau

se she coughs. Based on the information given, which would be an incorrect correlation to make about this situation?
Social Studies
1 answer:
Nataly_w [17]3 years ago
3 0
Lauren coughs because the sun shines into her window.
This is incorrect because Lauren most likely coughs because she wakes up not necause of the sun.

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Dr. Chung, a renowned nutritionist, has consistently proclaimed the benefits of a balanced breakfast. To substantiate her claim,
Mice21 [21]

Answer:

Explanation:

Dr. Chung, a renowned nutritionist, has consistently proclaimed the benefits of a balanced breakfast. To substantiate her claim, she asks her participants to go without breakfast for one week. The following week he asks the same participants to make sure they eat a complete breakfast. Following each week, Dr. Chung asks the supervisors of each participant to rate their productivity for that week.

Participant          Performance with Breakfast(X)       Performance Without Breakfast

(Y)

#1                                 8                                                                  6

#2                                 6                                                                  6

#3                                8                                                                  5

#4                                  8                                                                  5

Using α = .05, do a one-tailed test of the doctor's hypothesis.

What is your T=

<u>Performance with breakfast</u>

mean, X = (8+6+8+8)/4 = 7.5

using the formular, S = \sqrt{\frac{sum(xi-X)^{2} }{N-1} }

standard deviation, S =√[ [(8-7.5)² + (6-7.5)² + (8-7.5)² + (8-7.5)²]/(4-1)]

S = 1

Number of sample, N = 4

<u>Performance without breakfast</u>

mean, x = (6+5+6+5)/4 = 5.5

Using the formula as above, standard deviation  

s = \sqrt{\frac{sum(xi-x)^{2} }{n-1} }

s =√[ [(6-5.5)² + (6-5.5)² + (5-5.5)² + (5-5.5)²]/4-1]

s = 0.58

n = 4

T is given as follows

T = \frac{X- x}{\sqrt({\frac{S^{2} }{N} }+\frac{s^{2} }{n}  )}

T = [(X - x)/[(S²/N) + (s²/n)]]

T = [(7.5 - 5.5)/[(1²/4) + (0.58²/4)]]

 T = 3.46

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