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You conducted a study to examine the relationship between party affiliation and gender. You find the following:
Democrat
Republican
Independent
Male
52
65
20
Female
88
35
Are sex and party affiliation related?
Report the appropriate null and research hypotheses and the critical value (alpha = 0.05). In addition, provide your statistical conclusion, including calculation of test statistic and what the data suggests in one to two sentences.
components used in a cellular telephone are manufactured with nominal dimension of 0.3 mm and lower and upper
Find the 95% confidence interval of the mean score for all 50 golfers. Find the 95% confidence interval of the mean score for all golfers if this is a sample of 80 golfers instead of a sample of 50.
Please define correlation and regression. Describe a management or business-related scenario where a researcher might be interested in whether a number of variables are correlated (without any assumptions about causation).
Write a statement that interprets the confidence interval. Based on the preceding result, should pollsters be concerned about results from surveys conducted by telephone?
What is the probability that any given box is under the 450 grams than the box is supposed to weigh and what is the probability that the total weight of a given "2-pack" is less than 900 grams?
Should you use a two tailed test versus the one tailed test? If the hypothesis is non-directional and you predict a difference between the means but do not specify which mean will be higher a two tailed test should be used.
there are 40 students in an elementary statistics class. on the basis of years of experience the instructor knows that
Test whether the gender distribution for basketball fans is significant different from general college by proportion test.
Suppose that we observe a random sample size n from a normally distributed population. If we are able to reject H0:µ = µ in favor of a two-tailed alternative hypothesis at the 10% significant level
the police department for a major city has found that the average height of their 1250 officers is 71 inches with a
The radar traps at each of the locations L1 L2 L3 L4 are operated 40 30 20 and 30 of the time a person who is speeding on his way to Penn State has a probablities of 2 1 5 and 2 respectivley of passing through these locations what is the probablit..
When the necessary conditions are met, a two-tail test is being conducted to test the difference between two population proportions.
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