8. Heights of 9-Year-Olds At age 9 the average weight (21.3 kg) and the average height (124.5 cm) for both boys and girls are exactly the same. A random sample of 9-year-olds yielded these results. At a= 0.05, do the data support the given claim that there is a difference in heights? Вoys Girls Sample size Mean height, cm 60 50 123.5 126.2 Population variance 98 120

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13.
8. Heights of 9-Year-Olds At age 9 the average weight
(21.3 kg) and the average height (124.5 cm) for both
boys and girls are exactly the same. A random sample
of 9-year-olds yielded these results. At a = 0.05, do the
data support the given claim that there is a difference in
heights?
Вoys
Girls
50
Sample
Mean height, cm
60
123.5
126.2
Population variance
98
120
Source: www.healthepic.com
Transcribed Image Text:Source. 13. 8. Heights of 9-Year-Olds At age 9 the average weight (21.3 kg) and the average height (124.5 cm) for both boys and girls are exactly the same. A random sample of 9-year-olds yielded these results. At a = 0.05, do the data support the given claim that there is a difference in heights? Вoys Girls 50 Sample Mean height, cm 60 123.5 126.2 Population variance 98 120 Source: www.healthepic.com
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