Stat Assignment 9B XXXXXXXXXXA doctor wants to know if there is a relationship between a father’s weight and his first newborn son’s weight. Perform a hypothesis test at Alpha = .01, using table I,...

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Stat Assignment 9B 1) A doctor wants to know if there is a relationship between a father’s weight and his first newborn son’s weight. Perform a hypothesis test at Alpha = .01, using table I, and interpret your result. If you reject the null hypothesis, get the regression line and predict the son’s weight if the father’s weight were 180 pounds. Data is missing. 2) An emergency room wants to determine if there is a relationship between outside temperature and numbers of visits during a given time period. Perform a hypothesis test at Alpha = .05, using table I, and interpret your result. If you reject the null hypothesis, get the regression line and predict the number of visits if the temperature is 95 degrees. Data is missing.
Answered Same DayDec 23, 2021

Answer To: Stat Assignment 9B XXXXXXXXXXA doctor wants to know if there is a relationship between a father’s...

David answered on Dec 23 2021
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Stat Assignment 9B
1) A doctor wants to know if there is a relationship between a father’s we
ight and his
first newborn son’s weight. Perform a hypothesis test at Alpha = .01, using table I, and
interpret your result. If you reject the null hypothesis, get the regression line and predict
the son’s weight if the father’s weight were 180 pounds.
Solution:
Null Hypothesis (Ho): ρ = 0
Alternative Hypothesis (Ha): ρ ≠ 0
X Y XY X² Y²
176 6.6 1161.6 30976 43.56
160 8.2 1312 25600 67.24
187 9.2 1720.4 34969 84.64
210 7.1 1491 44100 50.41
196 8.8 1724.8 38416 77.44
142 9.3 1320.6 20164 86.49
205 7.4 1517 42025 54.76
215 8.6 1849 46225 73.96
∑X = 1491 ∑Y = 65.2 ∑XY = 12096.4 ∑X² = 282475 ∑Y² = 538.5
Correlation(r) = NΣXY - (ΣX) (ΣY) / √ ([NΣX2 - (ΣX) 2] [NΣY2 - (ΣY) 2])
= (8*12096.4 – (1491) (65.2))/ √ (8*282475 – (1491)2) (8*538.5 –...
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