gcristhian8863

27.04.2021 • 

Mathematics

Antonia read an article that said 26% of Americans can speak more than one language. She was curious if this figure was higher in her city, so she tested H, :p=0.26 vs. H, :p > 0.26, where p represents the
proportion of people in her city that can speak more than one language.
Antonia took a sample of 120 people in her city found that 35% of those sampled could speak more than
one language. The test statistic for these results was z ~ 2.25, and the corresponding P-value was
approximately 0.01. Assume that the conditions for inference were met.
Is there sufficient evidence at the a= 0.05 level to conclude that the proportion of people in her city
that can speak more than one language is greater than 26%?

Ответ:

brooklynmikestovgphx

10.01.2022

Mathematics

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B

Step-by-step explanation:

The trick you need to employ is that when the rock hits the ground, the timer stops. So h must be taken as 0.

0 = - 16t^2 + 255            Set up the equation

- 255 = - 16t^2                Divide by -16

15.9375 = t^2                  Switch

t^2 = 15.9375                   Take the square root of both sides.

sqrt(t^2) = sqrt(15.9375)

t = 3.992 seconds

The closest answer is B

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