Bloom247
16.08.2021 •
Mathematics
Read the following scenario and determine which test is the most appropriate. To test whether Internet use increases depression score, we measure the depression scores of a random sample of non-Internet-users, have them use the Internet for a specified time, then measure their depression scores again.
a. Chi-Squared test for independence
b. Inference for regression
c. Two-Sample t-test
d. ANOVA
e. Matched-Pairs t-test
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Ответ:
C
Step-by-step explanation:
The equation for a ball thrown straight up is
y = v₀t - 0.5gt²
We don't know the initial velocity of the ball. We use the given condition from the problem that the maximum height was achieve after t = 2
y = 2v₀ - 19.62
v₀ = 0.5y + 9.81
Substituting, factoring, and replacing t with x, the result is:
y = –16(x – 2)^2 + 68