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Each person in a random sample of 224 male teenagers and a random sample of 303...

Each person in a random sample of 224 male teenagers and a random sample of 303 female teenagers was asked how many hours he or she spent online in a typical week. The sample mean and standard deviation were 15.2 hours and 11.3 hours for males and 14.3 and 11.7 for females. (Use a statistical computer package to calculate the P-value. Use μmales − μfemales. Round your test statistic to two decimal places, your df down to the nearest whole number, and your P-value to three decimal places.)

t =
df =
P =


Is there enough evidence to show that mean number of hours spent online in a typical week is greater for male teenagers than for female teenagers? Use a 0.05 significance level.

math   Statistics-And-Probability   
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=14.2 gl = }1.3 2 St 2 귓 221 803 \ 49. 136.89 22M 30 3 0.9 t.o218.olog =0.8904 とニ0.90 2. .3303 11.3) 224 、2 2 11.3 22너 303 3o 3- 324 223 RoL 202 1 0318

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