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1. The sample mean and sample variance of five data values are, respectively, x¯ = 104 and s2 = 16. If three of the data values are 102, 100, 105, what are the other two data values?
2. Suppose you are given the average pay of all working people in each of the 50 states of the United States.
(a) Do you think that the sample mean of the averages for the 50 states will equal the value given for the entire United States?
(b) If the answer to part (a) is no, explain what other information aside from just the 50 averages would be needed to determine the sample mean salary for the entire country. Also, explain how you would use the additional information to compute this quantity.
Because each roll has six possible even values (2, 4, 6, 8, 10, and 12) and only five possible odd values (3, 5, 7, 9, and 11), the dice should show even values more often than odd values. Do you agree with this statement? Explain.
The final grades given by two professors in introduction to operations research course have been carefully examined. The students in the first professor's class had a grade point average of 3.0 and a standard deviation of 0.2.
suppose a simple random sample of size n49 is obtained from a population with u71 and o21.a describe the sampling
Six people have declared their intentions to run for a county commission seat in the next general election. A political poll is conducted three-quarters of the way into the campaign to determine if there are any clear preferences on the part of th..
The Consumer Price Index (CPI) and the cost of a slice of pizza
Hypothesis test for difference between two population variances - compare the variation in the selling price of homes on the oceanfront with those one to three blocks from the ocean.
how many different ways can a teacher select 6 students from a class of 19 students to each perform a different
the sample space of equally likely outcomes for the experiment of rolling two fair dice is
the table below shows lifetime peptic ulcer rates per 100 population u for various family incomes x as reported by the
At a 5% level of significance, is there enough evidence from this survey to conclude that more than half of all adults would rather have $100 than a day off?
An oil co. is drilling some wells. the results are described as either a dry well or a producer well. Past experience suggests that 10% of exploratory wells are producer wells.
A box contains four tickets, one marked with a star and the other three blank. One draw is made from this box at random.
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