17.34 (EX) Oligofructose and calcium absorption 1/6: Nondigestible oligosaccharides are known to stimulate calcium absorption in rats. A double-blind, randomized experiment investigated whether the consumption ofoligofructose similarly stimulates calcium absorption in healthy male adolescents 14 to 16 years old. The subjects took a pill for nine days and had their calcium absorption tested on the last day. The experiment was repeatedthree weeks later. Some subjects received the oligofructose pill in the first round and then a pill containing sucrose (which served as a control). The order was switched for the remaining subjects. Here are the fractional calciumabsorption data (in percent of intake) for 11 subjects:SubjectControl1 2 3 4 5 6 7 8 9 10 1178.4 76.6 57.4 51.5 49.0 46.6 44.2 42.9 37.2 34.1 24.6Oligofructose 62.0 95.1 46.5 49.4 89.7 43.8 50.3 51.6 66.6 52.7 54.0Explain clearly why the matched pairs t test is the proper choice for this experimental design.O Because this was a double-blind, randomized experiment.O Because two treatments, control and oligofructose, were implemented.O Because subjects were grouped into two groups.O because each subject was given both the control and oligofructose pills. 17.34 (EX) Oligofructose and calcium absorption 3/6: Do the data support the hypothesis that oligofructose facilitates calcium obsorption? Let ō be the mean difference of fractional calciumabsorption between oligofructose and control. State the hypotheses.OHO: 8 10.84 vs. Ha: 6> 10.84O HO: 6 = 0 vs. Ha: ō > 0O HO: 6 = 0 vs. Ha: ō #0OHO: 8 = 0 vs. Ha: ō < 0

If the sample size is small where population follows the assumption of normal distribution then t…

Answered: 17.34 (EX) Oligofructose and calcium…

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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Researchers conducted trials to investigate the effects of color on creativity. Subjects with a red background were asked to think of creative uses for a brick; other subjects with a blue background were given the same task. Responses were scored by a panel of judges and results from scores of creativity are given in the accompanying table. Higher scores correspond to more creativity. The researchers make the claim that "blue enhances performance on a creative task." Assume that the two samples are independent simple random samples selected from normally distributed populations, and do not assume that the population standard deviations are equal. Complete parts (a) and (b). Click the icon to view the summary statistics. a. Use a 0.01 significance level to test the claim that blue enhances performance on a creative task. What are the null and alternative hypotheses? OA. Ho: H₁ H₂ H₁: H₁ H₂ OC. Ho: H₁ H₂ H₁: H₁ H₂ The test statistic, t, is (Round to two decimal places as needed.) The…
2. 90 male volunteers are randomly assigned to three different treatment programs designed to produce a weight loss by focusing on either diet, exercise, or the modification of eating behaviour. Weight changes were recorded, to the nearest pound, for all participants who completed the two-month experiment. Positive scores signify a weight drop; negative scores, a weight gain (in kg). Diet Exercise Modification of eating behaviour 9.07 -0.15 7.44 2.12 -4.98 8.53 6.65 8.31 10.48 9.14 -9.99 -9.08 8.03 -9.96 4.62 -1.09 0.18 5.33 9.03 11.04 -7.84 12.03 12.04 9.89 8.43 10.12 9.00 10.51 7.17 7.55 0.15 2.18 8.63 8.91 6.38 6.70 8.63 10.86 12.30 11.02 14.44 8.94 6.07 0.43 2.70 0.11 11.16 9.03 9.99 -5.05 9.86 11.73 11.42 8.49 10.05 10.40 2.52 0.68 1.39 -2.19 9.13 10.31 6.83 12.68 9.43 10.24 11.42 11.97 9.98 -9.11 -1.28 4.51 -4.10 -0.98 | 12.03 9.67 8.67 5.93 4.58 3.39 -3.02 0.48 | 9.10 9.52 8.75 10.61 2.22 0.13 11.33 11.76 a. Develop a box-plot graph for the above data. Write the interpretation…
1.110 Late Night Eating It is well-known that lack of sleep impairs concentration and alertness, and this might be due partly to late night food consumption. A study74 took 44 people aged 21 to 50 and gave them unlimited access to food and drink during the day, but allowed them only 4 hours of sleep per night for three consecutive nights. On the fourth night, all participants again had to stay up until 4 am, but this time participants were randomized into two groups; one group was only given access to water from 10 pm until their bedtime at 4 am while the other group still had unlimited access to food and drink for all hours. The group forced to fast from 10 pm on performed significantly better on tests of reaction time and had fewer attention lapses than the group with access to late night food.
According to the USDA, 46.2% of males between 20 and 39 years old consume the minimum daily requirement of calcium. After an aggressive “Got Milk?” campaign, the USDA conducts a survey of 48 randomly selected males between the ages of 20 and 39 and finds that 32 of them consume the recommended daily allowance of calcium. At the alpha=0.10 level, is there evidence to conclude that the percentage of males between the ages of 20 and 39 who consume the minimum recommended daily allowance of calcium has increased?
The Paleo diet allows only for foods that humans typically consumed over the last 2.5 million years, excluding those agriculture-type foods that arose during the last 10,000 years or so. Researchers randomly divided 500 volunteers into two equal-sized groups. One group spent 6 months on the Paleo diet. The other group received a pamphlet about controlling portion sizes. A randomized treatment assignment was performed, and at the beginning of the study, the average difference in weights between the two groups was about 0 pounds. After the study, the Paleo group had lost an average of 7.1 pounds with a standard deviation of 22.75 pounds while the control group had lost an average of 4.5 pounds with a standard deviation of 11.5 pounds. After failing to reject the null hypothesis support your answer with a p-value (a) P-value = _______
17.19 Acute otitis media. A double-blind randomized trial compared cefaclor to amoxicillin in the treatment of acute otitis media in children. There was no difference in clinical failure rates (all but four children in each group had a good clinical response), but after 14 days, 59 (55.7%) of 106 cefaclor-treated subjects had effusion-free ears compared to 40 of the 97 amoxicillin-treated subjects. Determine whether the effusion-free rates differed significantly in the groups. It is optional to show the hypothesis-testing steps.
10.1 Matches: Number per Box The Nero Match Company sells matchboxes that are supposed to have an average of 40 matches per box, with o = 9. A random sample of 94 Nero matchboxes shows the average number of matches per box to be 43.1. Using a 1% level of significance, can you say that the average number of matches per box is more than 40? %3D
all 12% 1:19 Y ☺ Lab Assignment #8_-150... ANOVA An experiment was conducted to determine if motivational techniques in management significantly impacted employee stress levels compared to no intervention. An employee survey was given to three groups: one group under a manager who started using a transformational motivation technique, one group under a manager who began using a transformational motivation technique, and then a control group with no new technique used. Stress levels were self-reported by the employees as shown below. Use alpha = 0.05 Transformational Transactional Control 2 6. 3 3 1. What is your null hypothesis? 2. What is your alternative hypothesis? After running the single factor analysis of variance on the data, what is the p-value for between 3. groups? Using the 95% significance level, is there a significance difference in stress levels between the three 4. groups? 5. Do you reject or accept the null hypothesis? Yes No Reject Accept II
A researcher conducts a between-subjects study to determine whether low levels of the neurochemical serotonin leads to an increase in aggression. One sample of rats serves as a control group and receives a placebo that does not affect normal levels of serotonin. A second sample of rats receives a drug that lowers brain levels of serotonin. Using an alpha level of a = .05, the researcher then tests the animals by recording the number of aggressive responses each of the rats display. The data are as follows: a.) Step 1: State the Hypotheses Ho: H₁: Control n = 10 M = 14 SS=180.5 b.) Step 2: Determine the critical region and draw it on the distribution above: df = > *critical SM₁-M₂ Low Serotonin n = 15 M = 19 SS = 130.0 c.) Step 3: Calculate the test statistic using the provided sample data: tobs d.) Step 4: Make a decision. Circle one: Reject Null (Ho) or Fail to Reject Null (Ho) e.) State your conclusions about the research scenario in sentence form: d= f.) What is the estimated effect…
A study in a journal published by the American Academy of Pediatrics (as reported in the Miami Herald, Jan. 14, 1997) seems to suggest that preschoolers who drink more than 12 ounces of fruit juice a day tend to be heavier and shorter than preschoolers who do not. The study involved a random sample of 168 healthy youngsters of whom 59 drank on average more than 12 ounces of fruit juice per day. Each child was weighed and measured. The measurements were then converted to percentage of normal height and weight for a child of that age and gender. For example, a weight percentage of 1.1 indicates that the child is 10% heavier than average. A recorded 0.80 indicates the child is 20% below the average. An average weight is recorded as 1.0. Same with height. Column 1: Juice 1- indicates child DID drink > 12 oz 2- child DID NOT drink > 12 oz Column 2: Weight% weight converted to percent of…
According to the USDA, 46.2% of males between 20 and 39 years old consume the minimum daily requirment of calcium. After an aggressive "Got Milk?' campaign, the USDA, conducts a survery of 48 randomly selected males between the ages of 20 and 39 and finds that 32 of them consume the recommended daily allowance of calcium. At the alpha =0.10 level, is there evidence to conclude that the percentage of males between the ages of 20 and 39 who consume the minimum recommended daily allowance of calcium had increased?
Based on the results presented, did the exercise intervention groups still receive a health benefit even if significant weight loss did not occur? Explain.

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