2.23. Calcium and vitamin D. Vitamin D is needed forthe body to use calcium. An experiment is designed toassess the effects of calcium and vitamin D supplementson the bones of first-year college students. The outcomemeasure is the total body bone mineral content (TBBMC),a measure of bone health. Three doses of calcium will beused: 0, 200, and 400 milligrams per day. The doses ofvitamin D will be 0, 50, and 100 international units (IU)per day. The calcium and vitamin D will be given in asingle tablet. All tablets, including those with no calciumand no vitamin D, will look identical. Subjects for thestudy will be 90 men and 90 women.(a) What are the factors and the treatments for thisexperiment?(b) Draw a picture explaining how you would randomizethe 180 college students to the treatments.(c) Use a spreadsheet to carry out the randomization.

Answered: Image /qna-images/answer/2d4c3209-03d9-4ae0-ada2-db5b79380c23.jpg

Answered: 2.23. Calcium and vitamin D. Vitamin D…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Part A. Depression affects many people. 25 out of 100 people with untreated depression will lose at least one friendship while not receiving treatment. On the other hand, when people with depression are treated with medication and counseling, only 2 out of 100 will lose at least one friendship during treatment. The absolute risk of losing at least one friendship while being treated with medication and counseling is Answer: 2 / 100 = 0.02 = 2%
Do various occupational groups differ in their diets? A British study of this question compared 98 drivers and 83 conductors of London double-decker buses. The conductors' jobs require more physical activity. The article reporting the study gives the data as "Mean daily consumption (+ se)." Some of the study results appear below. Drivers Total calories 2821 +44 Alcohol (grams) 0.24 0.06 Conductors 2844 +48 0.39 ± 0.11 Construct a 99% confidence interval for the difference in mean daily alcohol consumption between drivers and conductors.
Is this correct so far?
When determining which is significant for part a -make sure to include df, p value (greater than or less than .05), and t statistic
cmid=855541&page=28 page n F5 Pat received the following grades in four classes. In Pat's History class, what is the percentage of students scoring higher than Pat? (round to two decimal places, don't include the % sign in your answer) % Subject Psychology Math History English Answer: F6 + W F7 Pat's Grade 75 90 86 83 W & F8 Class Mean 83 85 80 88 Pa F9 F10 Class Standard Deviation 8 6 4 A X F11 * F12 Home End Insert +1 Time left 1:35:4 Next page 12:54 PM *A*G 2/17/2023 Q T495S Delete Backspace
A paper investigated the driving behavior of teenagers by observing their vehicles as they left a high school parking lot and then again at a site approximately mile from the school. Assume that it is reasonable to regard the teen drivers in this study as representative of the population of teen drivers. Amount by Which Speed Limit Was Exceeded Female Driver -0.1 0.4 1.1 0.7 1.1 1.2 0.1 0.9 0.5 0.5 (a) Use a .01 level of significance for any hypothesis tests. Data consistent with summary quantities appearing in the paper are given in the table. The measurements represent the difference between the observed vehicle speed and the posted speed limit (in miles per hour) for a sample of male teenage drivers and a sample of female teenage drivers. (Use males - females: Round your test statistic to two decimal places. Round your degrees of freedom down to the nearest whole number. Round your p-value to three decimal places.) t= df = P = Male Driver 1.4 1.2 0.9 2.1 0.7 1.3 3 1.3 0.6 2.1 (b) Do…
In a study of exhaust emissions from school buses, the pollution intake by passengers was determined for a sample of nine school buses used in the Southern California Air Basin. The pollution intake is the amount of exhaust emissions, in grams per person, that would be inhaled while traveling on the bus during its usual 18-mile trip on congested freeways from South Central LA to a magnet school in West LA. Here are the amounts for the nine buses when driven with the windows open. 1.17 0.33 0.40 0.33 1.32 0.38 0.25 0.40 0.35 (a) Consider making a stemplot. Are there outliers or strong skewness that would preclude use of the t procedures? Which is correct? A. The sample is small and the stemplot is right skewed with possible outliers, so use of t procedures is not appropriate. b. The distribution is symmetric so use of t procedures is appropriate. c. The sample is small and the stemplot is left skewed with possible outliers, so use of t procedures is…
b) Calculate the fitness of a population with allele frequency x = 0.4. W = Give your answer rounded to 2 decimal places. Find the allele frequency, x, of a population with fitness 0.2. X =
What are the missing values for Between and Within treatment, in terms of DF, MS and F?
Home Prices A real estate agent compares the selling prices of homes in two municipalities in a certain location to see if there is a difference. The results of the study are shown. Is there enough evidence to reject the claim that the average cost of a home in both locations is the same? Use a = 0.10. City A City B X = $96,950 X,= $98,600 o, = $5602 0, = $4731 n, = 36 n2= 37 Part 1 of 5 motheses and identify the claim. separate them with (s):-1.65, 1.65 Part: 2 / 5 Part 3 of 5 (c) Compute the test value. Always round z score values to at least two decimal places.
Four types of Soda were tested to determine their effect on weight gain. The data is shown below. Which statement is true? Choose all that apply Weight gain in Kg/year A 5.2 4.5 6.0 6.1 6.7 5.8 B 6.5 8.0 6.1 7.5 5.9 5.6 C 5.8 4.7 6.4 4.9 6.0 5.2 D 8.3 6.1 7.8 7.0 7.8 7.0 5.5 7.2 a. All the soda types do not differ with respect to true average weight gain at a =0.01 b. At least two of the soda types differ with respect to true average weight gain at a =0.01 c. At least two of the soda types differ with respect to true average weight gain at a =0.05 d. All the soda types do not differ with respect to true average weight gain at a =0.05
. Matched one-sample t-test. The water diet requires you to drink 2 cups of water every half hour from when you get up until you go to bed but eat anything you want. Four adult volunteers agreed to test this diet. They are weighed prior to beginning the diet and 6 weeks after. Their weights in pounds are Person Weight before Weight after 1 3 4 mean s.d. 180 125 240 150 173.75 49.56 170 130 215 152 166.75 36.09 Difference 10 -5 25 -2 7 13.64 Conduct a one-sample t-test using the difference with the following hypotheses: HO: Diff = 0 Ha: Diff + 0 Report the test statistic with the P-value, then summarize your conclusion.

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