Which of the following is not an acceptable approach to express a null hypothesis? Ho: Hi- H2 =0 Ho:p= 0.5 Ho:H=0 HoiP1- P2=0
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- Previously, 3% of mothers smoked more than 21 cigarettes during their pregnancy. An obstetrician believes that the percentage of mothers who smoke 21 cigarettes or more is less than 3% today. She randomly selects 150 pregnant mothers and finds that 3 of them smoked 21 or more cigarettes during pregnancy. Test the researcher's statement at the a = 0.05 level of significance. What are the null and alternative hypotheses? = 0.03 versus H,: p Ho: P (Type integers or decimals. Do not round.) 0.03 Because npo (1- Po) = || V 10, the normal model (Round to one decimal place as needed.) V be used to approximate the P-value.A sample of 800 computer chips revealed that 43% of the chips do not fail in the first 1000 hours of their use. The company's promotional literature claimed that more than 38% do not fail in the first 1000 hours of their use. Is there sufficient evidence at the 0.01 level to support the company's claim? State the null and alternative hypotheses for the above scenario.The body weight of a healthy 3-month-old colt should be about ? = 66 kg. I need help with (c) (d) and (e)
- Find the p-value for a left-tailed hypothesis test with a test statistic of z= -1.25The body weight of a healthy 3-month-old colt should be about ? = 66 kg. I need help with (a) (b) and (c)A decade-old study found that the proportion of high school seniors who felt that getting rich" was an important personal goal was 66%. Suppose that we have reason to believe that this proportion has changed, and we wish to carry out a hypothesis test to see if our belief can be supported. State the null hypothesis H. and the alternative hypothesis H, that we would use for this test. Ho: H OSO Submit Assignmen Privacy Accessibili Continue O 2021 McGraw-Hill Education. All Rights Reserved. Terms of Use revious
- The manufacturer of a new antidepressant claims that, among all people with depression who use the drug, the proportion p of people who find relief from depression is at least 65%. A random sample of 170 patients who use this new drug is selected, and 100 of them find relief from depression. Based on these data, can we reject the manufacturer's claim at the 0.1 level of significance? State the null hypothesis H0 and the alternative hypothesis H1 Find the z test value Find the p-value Can we reject the claim that the proportion of people who find relief from depression using the new antidepressant is at least 65%? Yes or No?A recent study found that 18 out of 30 students believe that 8 AMs are tougher than other class times. Research at the beginning of the semester found that 43% of the class felt that 8 AMs are tougher than other class times. The professor is curious if this means 8 AMs are indeed tougher than other class times. Which of the following is the null hypothesis? 1. Ho: p > 0.43 2. Ho: p = 0.43 3. Ho: p < 0.43 4. Ho: p != 0.43 Which of the following is the alternate hypothesis? Group of answer choices 1. Ha: p = 0.43 2. Ha: p < 0.43 3. Ha: p > 0.43 4. Ha: p != 0.43 What is the Z score of our test statistic?Previously, 3% of mothers smoked more than 21 cigarettes during their pregnancy. An obstetrician believes that the percentage of mothers who smoke 21 cigarettes or more is less than 3% today. She randomly selects 145 pregnant mothers and finds that 3 of them smoked 21 or more cigarettes during pregnancy. Test the researcher's statement at the a = 0.1 level of significance. What are the null and alternative hypotheses? Họ: P = 0.03 versus H4: p < 0.03 (Type integers or decimals. Do not round.) Because npo (1- Po) =|| 10, the normal model V be used to approximate the P-value. (Round to one decimal place as needed.)
- 8.7 If you test a hypothesis and reject the null hypothesis in favor of the alternative hypothesis, does your test prove that the alternative hypothesis is correct? Explain.In a one-tail hypothesis test where you rejected Ho only in the upper tail, what is the value is Zstat =+2.00?What is the p-value if, in a two-tail hypothesis test, ZSTAT=+1.45? p-value= (Round to four decimal places as needed.)
