Mathematics, 21.11.2019 23:31 matthewdabber7
You are waiting for the bus, and are rather impatient. your friend tells you that busses arrive according to an exponential distribution with parameter =1/10 (busses/min) for a mean waiting time of 10 minutes. you've been waiting for a while, and want to prove their hypothesis wrong: you're thinking the wait is longer than that (one-tailed). (note: you may use the approximation e^3≈20 when applicable on this problem. you may do calculations in python if you wish, but all exposition should be in markdown.)
part a: state the null and alternative hypotheses being tested.
part b: devise a test of the form "reject if x> cx> c" where cc is how long you have to wait until the bus arrives. use a significance of α=.05α=.05. how long do you wait before you reject the null hypothesis with a probability of type i error of 5%?
part c: what is the power of your test if the true rate is λ=1/60λ=1/60? (nb: power is defined as the complement of making a type ii error: it's the rate at which you correctly reject a false null hypothesis)
part d: it turns out neither the null nor alternative are correct! the true distribution of busses was a continuous uniform distribution with pdf
Answers: 2
Mathematics, 21.06.2019 16:30, LiannaMarquez542
Adam plans to choose a video game from the section of the store where everything is 75% off. he writes the expression d-0.75d to find the sale price of the game if the original price is d dollars. gena correctly writes another expression, 0.25d, that will also find the sale price of the game if the original price is d dollars. use the drop down menus to explain each part of adams and rena's expression
Answers: 3
Mathematics, 21.06.2019 17:00, alexabdercmur
You are a clerk at convenience store. a customer owes 11.69 for a bag of potatoes chips. she gives you a five dollar bill. how much change should the customer receive?
Answers: 2
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