5236 PEROX -
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Sjo_BUOT
VRKSKUNDIGOURCO QONTE
2. Marc tossed a paper cup in the air 860 times and recorded whether it landed right side up,
upside down, or on its side. The paper cup landed right side up 245, landed upside down 312.
landed on its side 243. If Marc tosses the paper cup 500 more times, what is the expected
number of times that the cup will land right side up?
(1.5 Points)
O 0.284
O 142 times
0.281
141 times

According to a research study, parents with young children slept 6.4 hours each night last year, on average. a random sample of 18 parents with young children was surveyed and the mean amount of time per night each parent slept was 6.8. this data has a sample standard deviation of 0.9. (assume that the scores are normally distributed.) researchers conduct a one-mean hypothesis at the 5% significance level, to test if the mean amount of time parents with young children sleep per night is greater than the mean amount of time last year. the null and alternative hypotheses are h0: μ=6.4 and ha: μ> 6.4, which is a right-tailed test. the test statistic is determined to be t0=1.89 using the partial t-table below, determine the critical value(s). if there is only one critical value, leave the second answer box blank.