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The student newspaper called Campus Press polled a simple random sample of 280 undergraduate students in order to study student attitude toward a proposed change in dormitory regulations. Students responded as either support, oppose, or neutral with regards to the issue. The numbers are displayed in the table below: Student attitude Support 158 Neutral 73 Oppose49 Total 280 Suppose that the Campus Press suspects that half of the students support the change in regulations, and 20% of them oppose (leaving 30% to be neutral). 1. What would be the null hypothesis for a chi-square test based on this suspicion? 2. Under the null hypothesis, what is the value of the expected count for students who oppose the proposed change in dormitory regulations? 3. What is the chi squared statistic?
A mathematical placement test is given to all entering freshmen at a small college. A student who receives grades below 35 is denied admission to the regular mathematics course and placed in a remedial class.
Suppose a well-known baseball player states that, at this stage of his career, he is a "300 hitter" or better. That is, he claims that he gets a hit in at least 30% of his at-bats. Over the next month of the baseball season, this player has 105 at..
The probability that a given altenator will fail on a 1-hour flight is .02. What is the probability that (a) both will fail? (b) neither will fail? (c) one or the other will fail? Show all steps carefully.
the u.s. national highway traffic safety administration gathers data concerning the causes of highway crashes where at
if x and y are independent then conditional and marginal densities are equal.could someone please help me explain this
Would you play this game if you wanted to make money? What do we expert the value of the results of the game to be?
assuming a line of regression of y 2.1 0.8x between temperatures and production yield. if the average temperature is
the quality-control inspector of a production plant will reject a batch of syringes if two or more defective syringes
When doing hypothesis testing we have two ways of making a decision - the critical value method and the p-value method. While both give the same results in terms of determining whether to reject or not reject the null hypothesis
at a track and field tournament freds long jumps vary evenly from 6.5 to 7.2 meters. let x be the length of freds long
In the past, Bly has tended to estimate warranty expenses on the high end to be conservative. He must work with the dealership's accountant at year-end to arrive at the warranty expense accrual for cars sold each year.
If two voters are randomly selected for a telephone survey, what is the probability that they one is a Republican followed by a Democrat? Round your answer to 4 decimal places.
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