Mathematics, 08.11.2019 02:31 sabrinabowers4308
Astudy was conducted to investigate the relationship between maternal smoking during pregnancy and the presence of congenital malformations in the child. among children who suffer from an abnormality other than down's syndrome or an oral cleft, 32.8% have mothers who smoked during pregnancy. this proportion is homogeneous for children with various types of defects.
a) if you were to select repeated samples of size 25 from this population, what could you say about the distribution of the sample proportions? list 3 properties.
b) among the samples of size 25, what fraction has a sample proportion of .45 or higher?
c) what fraction has a sample proportion of .20 or lower?
d) what value of p cuts off the lower 10% of the distribution?
Answers: 2
Mathematics, 22.06.2019 02:50
Aresearcher believes increased perceived control influence the well-being of residents at a nursing home. to test this , she allowed one group of residents to have control over their daily lies, (where to eat etc) . the other group of 5 residents had these deceisions made by staff. the resident's feelings of well-being were measured on a 10 point scale at the end of a one month trial period. is there a difference on well-being?
Answers: 2
Mathematics, 22.06.2019 08:30
Commission or salary: jill has a job offer. she is offered either $50 per day or ? 30 per day plus a commission of $3 for every plant she sells. how many plants does she need to sell to make the commission offer the best paying option?
Answers: 2
Astudy was conducted to investigate the relationship between maternal smoking during pregnancy and t...
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