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A study 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?
Calculate a 3-period moving average for period 7. Compute the MAD of the forecast.
How do you set up SPSS to find descriptives for the perceived learning variable for each gender?
Determine the z values for 29 and 34 hours. What percent of the garages take between 32 hours and 34 hours to erect?
q1. what are the economic rationales for different types of government intervention in health care?q2. explain the
Use Chebyshev's theorem to find what percent of the values will fall between 120 and 150 for a data set with mean of 135 and standard deviation of 7.5.
Suppose you study a random sample of 100 GRE verbal exams. Consider your a sketch of the sampling distribution of sample means and the appropriate calculation model.
An experiment ws designed to estimate the mean difference in weight gain for pigs fed ration A as compared with those fed ration B. Eight pairs of pigs were used. The pigs within each pair were littermates.
Explain why a strong correlation would be found between weekly sales of firewood and weekly sales of cough drops over a 1-year period. Does the strong correlation mean that one variable causes the other?
a client gives you a data set of 30 observed values that represent the number of gallons of gas that 30 individual
Airline Travelers often choose which airport to fly from based on flight cost. Cost data (in dollars) for a sample of flights to eight cities from Dayton, Ohio, and Louisville, Kentucky, were collected to help determine which of the two airports was ..
The heights in inches of 18 randomly selected adult males in LA are listed as: 70, 69, 72, 57, 70, 66, 69, 73, 80, 68, 71, 68, 72, 67, 58, 74, 81, 72. Display the data in a stem-and-leaf plot.
What are the assumptions regarding an ANOVA test and what Excel aid would you use to perform the test, Data Analysis or MacDoIt? What are the assumptions regarding a Chi-square test?
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