Derrick null

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Here, it says that Kiley has a dime and a nickel and she wonders if they have the same likelihood of showing heads when they are flipped. She flips each coin times to test if there is a significant difference in the proportion of flips that they each land showing heads.

Which of the following is an appropriate set of hypotheses for Kiley's significance test? So, once again, pause the video. Try to do it on your own. Alright, well, your null hypothesis would be that there is no difference.

So, that the proportion of getting heads with your dime is the same as your proportion of heads with your nickel. And then, your alternative hypothesis, so it says here she fl, she wants to test if there's a significant difference. She's not trying to say if the proportion of dimes coming up head is significantly lower or significantly larger.

She just cares about the difference. If there's a significant difference in the proportion of slips. So, her alternative hypothesis is that there is a difference. That these two proportions are not equal to each other. And, so, if we look at the choices, so this null hypothesis looks good. This null hypothesis does not look good. Remember, you're null hypothesis, you're trying to assume that, man, there's no news here. So, all of these null hypotheses, these, A, B, and D's null hypotheses look good.

And then, the alternative hypotheses is this is exactly what we wrote before is for choice D. Choice A's alternative hypothesis would work if here it said she flips each coin times to test if there is, if the proportion of heads with the dime is significantly lower than the proportion of heads with the nickel or something like that. And then, if it was the reverse, then choice B would look good. But, she just wants to see if there's a difference, not if one is lower than the other.

And, so I would pick choice D. Writing hypotheses for testing the difference of proportions. BDX Text List. BDX Mortgage Calc. Calculate Payment. Mortgage Term 15 Quick Move-In. BDX dropdown. Sort By. BDX Cards. Photo Gallery. Visit Our Community. Sales Office Hours. Sales Associate. BDX Map. Get Driving Directions. Schedule a Meeting. At Smith Family Homes, we believe in building more than a house. My Account. Already have an account?