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Montana. A poll conducted by the University of Montana classified respondents by whether they were male or female and political party, as shown in the table. We wonder if there is evidence of an association between being male or female and party affiliation.
Democrat
Republican
Independent
Male Female
36 48
45 33
24 16
a) Is this a test of homogeneity or independence?b) Write an appropriate hypothesis.c) Are the conditions for inference satisfied?d) Find the P-value for your test.e) State a complete conclusion.
This video explains the normal distribution via the binomial distribution: The distribution of the number of heads thrown on 20 coins approximates the normal. This is used to explain that the normal distribution is the mathematical consequence of ..
Unfortunately, it is nearly impossible to split a candy bar exactly in half since the break point is effectively random. Let X be the weight of your part and Y be the weight of your friends part. What is the correlation between X and Y?
What term is used to describe the fact that productivity increased simply because the subjects knew they were in an experiment?
Faced with rising fax costs, a firm issued a guideline those transmissions of 10 pages or more should be sent by 2-day mail instead. Exceptions are allowed, but they want the average to be 10 or below.
Conduct post hoc comparisons with the LSD method. Which groups differ significantly at α = 0.05?
A committee is evaluating six equally qualified candidates for a job.- How many possible ordered choices of three out of six candidates are there?
Vision. It is generally believed that nearsightedness affects about 12% of all children. A school district tests the vision of 169 incoming kindergarten.
Is the actual proportion of people who trust DNA testing larger than 90%? Test the researcher's claim at the 1% level of significance.
Oil is actually present in 1% of the cases tested. If the test shows positive, what is the probability that oil is present?
A study was carried out to find out whether prices differed, on average, within three possible market conditions: monopoly, limited competition.
Equal opportunity? A company issued for job discrimination because only 19% of the newly hired candidates were minorities when 27% of all applicants.
Calculate the dollar ending inventory if first in, first out (FIFO) is used. Calculate the cost of goods sold if LIFO is used.
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