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- 一 Find the critical value(s) for the type of t-test with level of significance a and sample size n. Ho =20, a= 0.01, n= 12 O A. +2.201 O B. +2.718 O C. +3.106 Type here to searchwater Participa Pulse (bpm) nt Before After 1 81 77 2 78 84 3 82 88 4 82 83 94 82 6 82 79 7 74 67 112 110 9 100 85 Perform a t-test (signiticance level a 0.05) to test your null hypothesis and compare Pulse before consume water and pulse after consume water inA decade-old study found that the proportion, p, of high school seniors who believed that "getting rich" was an important personal goal was 75%. A researcher decides to test whether or not that percentage still stands. He finds that, among the 215s high school seniors in his random sample, 153 believe that "getting rich" is an important goal. Can he conclude, at the 0.1 level of significance, that the proportion has indeed changed? 00 Perform a two-tailed test. Then fill in the table below. Carry your intermediate computations to at least three decimal places and round your answers as specified in the table. (If necessary, consult a list of formulas.)
- ✔ BOTTOM LINE QUESTION Find the antiderivative ftan* tdt.f - 2 Fill in the blank. A Type I error is the mistake of OA. failing to reject the null hypothesis OB. rejecting the null hypothesis OC. rejecting the alternative hypothesis OD. failing to reject the alternative hypothesis 2 F2 W S X #3 80 F3 E D C $ 4 a F4 when it is actually true. R F % 5 V 9 F5 T G MacBook Air ^ 6 si F6 Y B & 7 H F7 U N 8 00 J DII FB 1 ( 9 F9 K M ) O V O F10What is the sensitivity of this test? What is the specificity of this test?
- Nonparametric: A small study is conducted to compare birth weight in babies born to mothers who do not smoke to those that smoke more than ½ pack/day. Is there a significant difference between birth weights due to maternal smoking status? Use the Mann-Whitney U test with a 5% level of significance. What is U1 (non-smokers)? Birth weights of infants in two groups of mothers. (Observed data) Nonsmokers Heavy Smokers (≥1/2 pack/day) 8.6 7.0 8.5 5.2 6.3 6.1 9.3 6.7 8.0 6.6 6.8 7.4 4.9 6.3The null hypothesis: H , :0 The alternative hypothesis: H :0 The type of test statistic: (Choose one) v The value of the test statistic: (Round to at least three decimal places.) The two critical values at the 0.05 level of significance: J and | (Round to at least three decimal places.) Can we support the claim that the life expectancy in Egypt is not equal to the life expectancy in Morocco? O Yes Nomline Assume that, on the average, normal rhesus monkeys spend an mean of 60 minutes dreaming while sleeping at night (thus, u 60 minutes). Time spent dreaming is E typically referred to as REM sleep (Rapid Eye Movement). You are interested in the effects a new dream-enhancing drug has on dreaming since an increase in the time spent dreaming while sleeping is thought to be a good thing in terms of getting a "restful" sleep. You want to pursue testing the drug in humans if there is any evidence that it significantly increases nightly dreaming time in these nonhuman primates. Ten rhesus monkeys are administered the drug in the morning and their dream time (in minutes) is monitored that night. The alternate hypothesis is: the drug will increase time spent dreaming, or the time in REM sleep. You obtain the following times (minutes) each monkey spent dreaming: 52, 69, 74, 60, 67, 65, 69, 55, 63, 68 Set alpha at a- .01, and complete step 4 of the hypothesis testing procedure, what decision…
