Entries by Munene david

All cars can be classified into one of four​ groups: the​ subcompact, the​ compact, the​ midsize, and the​ full-size

April 28, 2020 in /by

All cars can be classified into one of four​ groups: the​ subcompact, the​ compact, the​ midsize, and the​ full-size. There are five cars in each group. Head injury data​ (in hic) for the dummies in the​ driver’s seat are listed below. Use a 0.05 significance level. Find the​ P-value to test the null hypothesis that […]

 

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Ssuppose you know that the distrubtion of sample proportions of nonresidents

April 28, 2020 in /by

Ssuppose you know that the distrubtion of sample proportions of nonresidents in sample of 200 students is normal with a mean of 0.46 and a standard deviation of 0.05. Suppose you select a random of 200 students and find that the proportion of nonresident students in the sample is 0.43   Looking for a Similar […]

 

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One research study of illegal drug use among​ 12- to​ 17-year-olds

April 28, 2020 in /by

One research study of illegal drug use among​ 12- to​ 17-year-olds reported a decrease in use​ (from 11.4% in​ 1997) to 9.8 9.8​% now. Suppose a survey in a large high school reveals​ that, in a random sample of 1 comma 057 1,057 ​students, 93 93 report using illegal drugs. Use a 0.05 significance level to test the​ principal’s claim that […]

 

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When birth weights were recorded for simple random sample of 14 male

April 28, 2020 in /by

When birth weights were recorded for simple random sample of 14 male babies born to mothers taking special vitamin supplements, the sample mean of 3659 kilograms and a standard deviation of 0.666 kilogram. Use a 0.05 significance level to test the claim that the mean birth weight for all male babies of mother given vitamins […]

 

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