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The first test of the hypothesis that cholera could be contracted by drinking contaminated water (see Section 2.4) was to compare the number of cases of cholera in a South London neighbourhood during the few weeks (a) before and (b) after removal of the handle from a pump that drew water from a suspect well. Was this experiment well designed? Please comment.
You are running a chi-squared test. You have 2 groups with 3 characteristics each, what would your critical value be with an alpha of .025?
Scores by women on the SAT-I test are normally distributed with a mean score of 998 and a standard deviation of 202. scores by women on the ACT test are normally distributed with a mean of 20.9 and a standard deviation of 4.6 assume the two tests ..
find the 95 confidence interval for the variance of the weights of containers of motor oil if a sample of 14 containers
As sample size increases, the standard error of M _______________ .
Television the probability that a wife watches a certain television show is 0.55, that her husband watches it is 0.45, and that both watch the show is 0.30.
problem 1 a small factory consists of a machining center and inspection station in series. unfinished parts arrive to
What is the difference between the Wilcoxon signed-ranks test and the Wilcoxon rank-sum test? no minimum word count.
identify the type 1 error and the type 2 error that correspond to the given hypothesis. the percentage of adults who
What is the number of trials (n) probability success (p) and probability fail (q) respectively. What is the probability that I return at least 1 of the 10?
If you wanted to determine which of the two learning programs made the bigger difference in the participant's knowledge and skills, what statistical tests would you perform? What assumptions would the test have to meet before you proceed? How would y..
in a particular occupation a random sample of 210 men found that 65 smoked. in a random sample of 240 women 87 smoke.
In your opinion, which one/s of these factors (independent variables) will have a negative correlation with bone density and which one/s will have a positive correlation?
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