The outcome of interest to be measured in an expirement is called the? (Confounding, independent, dependent, controlled)?
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1. The outcome of interest to be measured in an expirement is called the? (Confounding, independent, dependent, controlled)?
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- 2. Accidentally a Scientist discovered "Sesame" during his research and he observed that 12.0 quintals per acre yield can be expected by sowing the seeds. To verify his expectation, he put request to 10 farmers who are nearby his research center and they agreed. Seeds were sowed and the yield came after few months. The yields (quintals/acre) were recorded as 14.3, 12.6, 13.7, 10.9, 13.7, 12.0, 11.4, 12.0, 12.6, 13.1. Do the results confirm the expectation with 95% confidence?Q2. Determine the number of times a fair coin must be tossed so that the probability of the ratio of the number of tails to the number of tosses being less than 0.4 or greater than 0.6 does not exceed 0.1Assume that a fund manager has no idea what he/she is doing and is esentially flipping a coin in order to make decisions. Let's say it's a 50/50 proposition that he/she will have a "good" year (i.e., do better than the market rate of return). (a) what is the probability that the fund manager will have 8 or more good years out of 10 years? (b) if there are 1000 such fund managers, about how many would you expect to have at least 8 or more "good" years out of 10 years?
- 13) The following table contains data about the perfomance of a couple of mutual funds with various stocks. Number of stocks which Number of stocks which increased in value last decreased in value last month 28 month Diverse Mutual Market Mutual 25 If one of the stocks is randomly selected, find the probability that the stock is from Diverse Mutual given that the stock increased last month. Write the answer as a simplified fraction. Show your work.The managers of an import agency are investigating the length of time that customers take to pay their invoices, the normal terms for which are 30 days net. They have checked the payment record of 100 customers chosen at random and have compiled the following table: a. Construct a histogram and use it to estimate the modal value. b. Estimate the probability that an unpaid invoice chosen at random will be between 30 and 39 days old.a) Determine the probability that a randomly selected call was during the week. The probability is----- (Round to three decimal places as needed.) b. Determine the probability that a randomly selected call was less than 20 minutes. The probability is----- (Round to three decimal places as needed.) c. Determine the probability that a randomly selected call was 10 to less than 20 minutes. The probability is----- (Round to three decimal places as needed.) A call center for customer support records the time each customer requires for service and whether the call occurred during the week (Monday through Friday) or during the weekend (Saturday and Sunday). The results are shown in the accompanying table. Complete parts a through h. Time (minutes) Week Weekend Less than 5 15 4 5 to less than 10 27 3 10 to less than 15 12 8 15 to less than 20 23 5 More than 20 10 14
- 16. At a drug rehab center 36% experience depression and 26% experience weight gain. 15% experience both. If a patient from the center is randomly selected, find the probability that the patient (Round all answers to four decimal places where possible.) a. experiences neither depression nor weight gain. b. experiences depression given that the patient experiences weight gain. c. experiences weight gain given that the patient experiences depression. (round to 4 decimal places) d. Are depression and weight gain mutually exclusive? yes no e. Are depression and weight gain independent? no yesUsing the pigeonhole principle Assuming no one has more than 1,000,000 hairs on the head of any person and that the population of Manila was 11,621,500 in 2009, there had to be at least _____ people in Manila in 2009 with the same number of hairs on their heads.5Suppose that in the first half of a certain season, Dustin Pedroia of the Boston Red Sox batted .300 while Mike Napoli batted only .275. And further suppose that in the seocnd half, Pedroia batted .250 while Napoli batted only .240. Someone claims that Napoli had a higher batting average for the entire season than Pedroia. Is that possible, or must the claim be rejected outright?
- I have money earned from working 40 hours a week, and I have money from a lottery scratcher. Our text tells us that we will likely treat these dollars differently. True FalseIf a raffle had a mathematical expectation of -$3.25, what would that mean? If I were to buy many tickets, then I would expect to lose $3.25 If I were to buy some tickets, then I would expect to lose a mean of $3.25 for every ticket purchased If I were to buy many tickets, then I would expect to lose a mean of $3.25 per ticket purchased If I were to buy many tickets, then I would expect to lose a mean of $3.25