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According to the massachusetts department of health, 224 women who gave birth in the state of Massachusetts in 1988 tested positive for the HIV antibody. Assume that in time, 25% of the babies born to such mothers will also become HIV positive. If samples of size 224 were repeatedly selected from the population of children born to mothers with HIV antibody, what would be the mean number of infected children per sample?
The average number of typos on one page of a manuscript is 8. What is the probability that 4 to 6 type appear on 2 pages of the manuscript? Imagine Poisson distribution.
In Major League Baseball there are five teams in the Western Division of the National League: Arizona, Los Angeles, San Francisco, San Diego, and Colorado. How many different orders of finish are there for these five teams?
City government has collected the following data on annual sales tax collections and new car registrations: Determine the least squares regression equation.
The percentages of cones sales for chocolate, strawberry, and vanilla, are 75%, 60%, and 40%, respectively. For a randomly selected sale, define the following events:
What do confidence intervals represent? What is the most controllable method of increasing the precision of or narrowing the confidence interval
If there are 500 students in the school, what is the probability that everyone will pass the exam?
Using an alpha level of 0.05, please use SPSS to perform a one-way ANOVA and then determine whether the data below provide evidence for Theory A, Theory B, or Theory C. In other words, is one theory stronger than the others?
Assuming that n = 6 for both samples, calculate each of the sample variances, then calculate the pooled variance. Because the samples are the same size, you should find that the pooled variance is exactly halfway between the two sample variances.
Consider different types of qualitative data collection and analysis methods and the ways in which they can support business decision making and strategies.
The frequency distribution below shows the distribution for suspended solid concentration (in PPM) in river water of 50 different waters collected in September 2011.
Assume we interested in relationship between the age of individual, as measured by visits. Suppose after selecting 15 members the observation:
What is the probability of randomly selecting a male from this group?
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