Mathematics, 27.08.2020 23:01 rociodelgado82

Select the correct answer from each drop-down menu. John is a psychologist. He wants to understand the correlation between exercise and severe depression. For five consecutive years, he decides to keep track of adults who exercise at least 30 minutes per day, five times a week, and adults who do not exercise at all. All studies yield the same results. This can be described as . Mendy spins a spinner and rolls a die to find the probability that the next spin and roll will have a sum of 8 to 10. The spinner has seven sections labeled 1 to 7, and the die has six sides labeled 1 to 6. This can be described as . An auto insurance company wants to compare the number of auto accidents in Seattle caused by adult drivers to the number caused by teen drivers. For seven consecutive months, the company decides to record the number of auto accidents caused by teen drivers and the number of auto accidents caused by adult drivers. This can be described as . Ryan randomly asks a group of 200 students at his school which sport among soccer, rugby, and lacrosse should be added as an intramural sport for students to play after school. Based on their answers, he concluded that lacrosse should be added as an intramural sport. This can be described as .

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Mathematics, 21.06.2019 22:00

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Mathematics, 21.06.2019 23:30

Aprisoner is trapped in a cell containing three doors. the first door leads to a tunnel that returns him to his cell after two days of travel. the second leads to a tunnel that returns him to his cell after three days of travel. the third door leads immediately to freedom. (a) assuming that the prisoner will always select doors 1, 2 and 3 with probabili- ties 0.5,0.3,0.2 (respectively), what is the expected number of days until he reaches freedom? (b) assuming that the prisoner is always equally likely to choose among those doors that he has not used, what is the expected number of days until he reaches freedom? (in this version, if the prisoner initially tries door 1, for example, then when he returns to the cell, he will now select only from doors 2 and 3.) (c) for parts (a) and (b), find the variance of the number of days until the prisoner reaches freedom. hint for part (b): define ni to be the number of additional days the prisoner spends after initially choosing door i and returning to his cell.

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Mathematics, 22.06.2019 03:30

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Select the correct answer from each drop-down menu. John is a psychologist. He wants to understand t...

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