(20) A dietitian wishes to see if a person’s cholesterol level will change if the diet is supplemented by a certain mineral. Five randomly selected subjects were pre-tested, and then they took the mineral supplement for a 6-week period. The Cholesterol level before and after taking the mineral supplements are shown in table below. (Cholesterol level is measured in milligrams per decilitre). Test the hypothesis to conclude that cholesterol level has been changed. Subject: 1      2     3.     4     5 Before: 210 208 190 172 244 After:    190 210 188 173 228 (a) State Null and Alternate Hypothesis. Clearly define the parameters (b) State Test Statistic and find its value. What assumptions/ conditions must you make/check in order to find out the value of Test Statistic? (c) Find the p-value (

In a test of H0:p=0.4 against Ha:p≠0.4, a sample of size 100 produces z=1.28 for the value of the test statistic. Thus the p-value of the test is approximately equal to?

The difference in the observed neurological disease rate, xbar, for a sample of veterans who served in Iraq is not  “statistically significantly different” (alpha = .05), from the overall population disease rate for all U.S. veterans, mu0. This means: a. xbar = mu0b. The disease rates xbar and mu0 are not equal, but the size of the difference is not practically important, not big enough to matter. c. H0: mu for Iraq vets =  mu0   was not rejected  d. None of the above

In 1992 a national vital statistics report indicated that about 2.3% of all births produced twins. Is the rate of twin births th same among very young mothers? Data from a large city hospital found only 7 sets of twins were born to 455 teenage girls. Test an appropriate hypothesis and state your conclusion. Be sure the appropriate assumptions and conditions are satisfied before you proceed. MA: P >0.023 B. Ho: p=0.023 HA: P = 0.023 OC. Ho: p=0.023 HA: P<0.023 OD. The assumptions and conditions are not met, so the test cannot proceed. Determine the z-test statistic. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. z = -1.08 (Round to two decimal places as needed.) B. The assumptions and conditions are not met, so the test cannot proceed. Find the P-value. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. OA. P-value = (Round to three decimal places as needed.) B. The assumptions and…

For each of the following hypotheses (including test statistic and other information), find the p-value (or its bounds) and draw a basic conclusion with respect to (w.r.t.) Ho with 95% confidence. Assume normality in the populations or that the Central Limit Theorem otherwise applies.

You are testing the claim that a population proportion exceeds .62.  The null hypothesis is H0H0:

A null and alternative hypothesis are given. Determine whether the hypothesis test is​ left-tailed, right-tailed, or​ two-tailed.   H0​: μ = 5.2 Ha​: μ ≠ 5.2       Question content area bottom Part 1 What type of test is being conducted in this​ problem?     A. Right​-tailed test   B. Two​-tailed test   C. Left​-tailed test

MORE BENEFITS OF EATING ORGANIC Using specific data, we find a significant difference in the proportion of fruit flies surviving after 13 days between those eating organic potatoes and those eating conventional (not organic) potatoes. This exercise asks you to conduct a hypothesis test using additional data. In this case, we are testing Họ : Po = Pc Ha: Po > Pc where p, and p. represent the proportion of fruit flies alive at the end of the given time frame of those eating organic food and those eating conventional food, respectively. Use a 5 % significance level. Effect of Organic Bananas After 25 Days After 25 days, the proportion of fruit flies eating organic bananas still alive is 0.45 , while the proportion still alive eating conventional bananas is 0.42. The standard error for the difference in proportions is 0.029. What is the value of the test statistic? Round your answer to two decimal places. z = i What is the p-value? Round your answer to three decimal places. p-value = What…

A researcher conducts a hypothesis test using a sample from an unknown population. If the t statistic has df = 30, how many individuals were in the sample?​

Test the hypothesis using the P-value approach. Be sure to verify the requirements of the test. Ho: p = 0.3 versus H1: p> 0.3 %3D n = 100; x = 45; a = 0.05 Click here to view page 1 of the table. Click here to view page 2 of the table. Calculate the test statistic, zo- Zo = (Round to two decimal places as needed.) Enter your answer in the answer box and then click Check Answer. 2 parts remaining Clear All Check Answer Screen Shot 202....png Show All