Question

Generally, chocolates can make consumers happy. Based on the pre and post mood scores, test the belief at a 4% significance level. Generally, people believe that eating chocolate can make the consumer happy. Based on the pre and post mood scores, test the belief at a 4% significance level. A B c D E F G H 10 BrandTg ChocoT Age Gender MoodPre TasteEvaluation MoodPost 2 4 Mass MiK 6.25 4.875 6.25 3 5 Mass Malk NN 6.125 4 10 Premiur Mk 22222E 325 4.875 5 13 Premiur M 1 6.125 3.75 6 15 Premiun M 1 5.125 7 16 Premiu Dark 2 5.75 5 17 Premiun Dark 2 3.75 425 19 Super Pr Mik 3 2 2.125 10 1 22 2.625 n 22 Super Pr Milk 2 2 4 4.75 12 23 Super Pr k 1 425 22 4.375 13 24 Super P Mk 55 NN 4.5 14 25 Super Pr 1 4.75 3.75 15 26 Super Pr M 2 45 4 4.25 16 2 5 4.625 17 28 Mas M. N 625 2295 18 30 Super P Dark 222 1 55 2.75 19 37 Super Pr Mik 2 9 4.875 5.75 20 38 Super Pr Dark 2 1 55 35 525 21 39 Super P Dark 2 5.75 6 41 Super Pr Dark 2 6 4.875 44 Supe Pr Dark 1 22- 225 5.75 45 Super Pr Dark 2 625 2125 46 Super Pt Milk 2 6.75 6 6.25 26 47 Super PT Dark 1 3.5 6.375 27 48 Super P Mik 6.5 28 50 Supe P Dark 6.75 5.25 625 51 Super Pr Dark 1 6 5.75 22 53 Super PM 2 1 5 3.25 31 55 Super Pr Mih 1 4.75 4.5 56 Super Pr Dark 3 222 4.75 4.875 57 Super Pr Milk 3 525 5.375 59 Super PMih 1 45 4.5 60 Super PlM 1 5.75 2.75 55 61 Super P Mk NN 5.75 6.375 6 37 62 Super PrM 322 525 5.75 38 99 Super Pr Dark - 525 35 5.75 39 67 Super Pr Mk 1 1 45 40 M 2 5.625 11 73 Super Pr Milk 3 4.375 42 74 Super Pr Mh 1 - 35 45 5.5 431 n2 1 1 55 2.375 525 44 77 Super Pr Mik 1 5875 4.75 45 78 Super P Mk 5 46 80 Premiur Dar N 45 5 5.75 47 81 Pm M - 2 25 5875 45 48 82 Prmiut M 2 2 4.5 5.125 49 5 Pemurt Mk - 425 35 50 86 Premurf Dark e 3 51 87 Prermnt Mil 525 6.75 52 88 Prerrun Dark 3 - 625 6.25 89 Pmun Mi - - 4.75 5 4.75 28 90 Preu Mlk - 575 65 65 55 91 Pmiun Mk 2 3.75 5.625 4.75 56 92 Premun Dark 6 6.625 57 Prmar Dark 50 99 Ptemun Dark 275 59 101 Pm M 2 4.75 6

          Generally, chocolates can make consumers happy. Based on the pre and post mood scores, test the belief at a 4% significance level. Generally, people believe that eating chocolate can make the consumer happy. Based on the pre and post mood scores, test the belief at a 4% significance level.

A B c D E F G H 10 BrandTg ChocoT Age Gender MoodPre TasteEvaluation MoodPost 
2 4 Mass MiK 6.25 4.875 6.25 
3 5 Mass Malk NN 6.125 4 
10 Premiur Mk 22222E 325 4.875 
5 13 Premiur M 1 6.125 3.75 
6 15 Premiun M 1 5.125 
7 16 Premiu Dark 2 5.75 
5 17 Premiun Dark 2 3.75 425 
19 Super Pr Mik 3 2 2.125 
10 1 22 2.625 n 
22 Super Pr Milk 2 2 4 4.75 
12 23 Super Pr k 1 425 22 4.375 
13 24 Super P Mk 55 NN 4.5 
14 25 Super Pr 1 4.75 3.75 
15 26 Super Pr M 2 45 4 4.25 
16 2 5 4.625 
17 28 Mas M. N 625 2295 
18 30 Super P Dark 222 1 55 2.75 
19 37 Super Pr Mik 2 9 4.875 5.75 
20 38 Super Pr Dark 2 1 55 35 525 
21 39 Super P Dark 2 5.75 
6 41 Super Pr Dark 2 6 4.875 
44 Supe Pr Dark 1 22- 225 5.75 
45 Super Pr Dark 2 625 2125 
46 Super Pt Milk 2 6.75 6 6.25 
26 47 Super PT Dark 1 3.5 6.375 
27 48 Super P Mik 6.5 
28 50 Supe P Dark 6.75 5.25 625 
51 Super Pr Dark 1 6 5.75 
22 53 Super PM 2 1 5 3.25 
31 55 Super Pr Mih 1 4.75 4.5 
56 Super Pr Dark 3 222 4.75 4.875 
57 Super Pr Milk 3 525 5.375 
59 Super PMih 1 45 4.5 
60 Super PlM 1 5.75 2.75 55 
61 Super P Mk NN 5.75 6.375 6 37 
62 Super PrM 322 525 5.75 
38 99 Super Pr Dark - 525 35 5.75 
39 67 Super Pr Mk 1 1 45 
40 M 2 5.625 
11 73 Super Pr Milk 3 4.375 
42 74 Super Pr Mh 1 - 35 45 5.5 
431 n2 1 1 55 2.375 525 
44 77 Super Pr Mik 1 5875 4.75 
45 78 Super P Mk 5 
46 80 Premiur Dar N 45 5 5.75 
47 81 Pm M - 2 25 5875 
45 48 82 Prmiut M 2 2 4.5 5.125 
49 5 Pemurt Mk - 425 35 
50 86 Premurf Dark e 3 
51 87 Prermnt Mil 525 6.75 
52 88 Prerrun Dark 3 - 625 6.25 
89 Pmun Mi - - 4.75 5 4.75 
28 90 Preu Mlk - 575 65 65 55 
91 Pmiun Mk 2 3.75 5.625 4.75 
56 92 Premun Dark 6 6.625 
57 Prmar Dark 50 
99 Ptemun Dark 275 
59 101 Pm M 2 4.75 6
        
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generally chocs can make consumer happy based on the pre and post mood scores test the believe at 4 significance level generally people believe that eating chocolate can make the consumer ha 73058

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Elementary Statistics a Step by Step Approach
Elementary Statistics a Step by Step Approach
Allan G. Bluman 9th Edition
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Generally, chocolates can make consumers happy. Based on the pre and post mood scores, test the belief at a 4% significance level. Generally, people believe that eating chocolate can make the consumer happy. Based on the pre and post mood scores, test the belief at a 4% significance level. A B c D E F G H 10 BrandTg ChocoT Age Gender MoodPre TasteEvaluation MoodPost 2 4 Mass MiK 6.25 4.875 6.25 3 5 Mass Malk NN 6.125 4 10 Premiur Mk 22222E 325 4.875 5 13 Premiur M 1 6.125 3.75 6 15 Premiun M 1 5.125 7 16 Premiu Dark 2 5.75 5 17 Premiun Dark 2 3.75 425 19 Super Pr Mik 3 2 2.125 10 1 22 2.625 n 22 Super Pr Milk 2 2 4 4.75 12 23 Super Pr k 1 425 22 4.375 13 24 Super P Mk 55 NN 4.5 14 25 Super Pr 1 4.75 3.75 15 26 Super Pr M 2 45 4 4.25 16 2 5 4.625 17 28 Mas M. N 625 2295 18 30 Super P Dark 222 1 55 2.75 19 37 Super Pr Mik 2 9 4.875 5.75 20 38 Super Pr Dark 2 1 55 35 525 21 39 Super P Dark 2 5.75 6 41 Super Pr Dark 2 6 4.875 44 Supe Pr Dark 1 22- 225 5.75 45 Super Pr Dark 2 625 2125 46 Super Pt Milk 2 6.75 6 6.25 26 47 Super PT Dark 1 3.5 6.375 27 48 Super P Mik 6.5 28 50 Supe P Dark 6.75 5.25 625 51 Super Pr Dark 1 6 5.75 22 53 Super PM 2 1 5 3.25 31 55 Super Pr Mih 1 4.75 4.5 56 Super Pr Dark 3 222 4.75 4.875 57 Super Pr Milk 3 525 5.375 59 Super PMih 1 45 4.5 60 Super PlM 1 5.75 2.75 55 61 Super P Mk NN 5.75 6.375 6 37 62 Super PrM 322 525 5.75 38 99 Super Pr Dark - 525 35 5.75 39 67 Super Pr Mk 1 1 45 40 M 2 5.625 11 73 Super Pr Milk 3 4.375 42 74 Super Pr Mh 1 - 35 45 5.5 431 n2 1 1 55 2.375 525 44 77 Super Pr Mik 1 5875 4.75 45 78 Super P Mk 5 46 80 Premiur Dar N 45 5 5.75 47 81 Pm M - 2 25 5875 45 48 82 Prmiut M 2 2 4.5 5.125 49 5 Pemurt Mk - 425 35 50 86 Premurf Dark e 3 51 87 Prermnt Mil 525 6.75 52 88 Prerrun Dark 3 - 625 6.25 89 Pmun Mi - - 4.75 5 4.75 28 90 Preu Mlk - 575 65 65 55 91 Pmiun Mk 2 3.75 5.625 4.75 56 92 Premun Dark 6 6.625 57 Prmar Dark 50 99 Ptemun Dark 275 59 101 Pm M 2 4.75 6
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2-an-article-in-nature-describes-an-experiment-to-investigate-the-effect-of-consuming-chocolate-on-cardiovascular-heath-plasma-antioxidants-from-chocolate-2003-vol-424-p-1013-the-experiment-14007

2. An article in Nature describes an experiment to investigate the effect of consuming chocolate on cardiovascular heath ("Plasma Antioxidants from Chocolate," 2003, Vol. 424, p. 1013). The experiment consisted of using three different types of chocolates: 100 g of dark chocolate, 100 g of dark chocolate with 200 ml of full-fat milk, and 200 g of milk chocolate. Twelve subjects were used, seven women and five men with an average age range of 32 ± 1 years, an average weight of 65.8 ± 3.1 kg, and body mass index of 21.9 ± 0.4 kg m⁻². On different days, a subject consumed on of the chocolate-factor levels, and one hour later total antioxidant capacity of that person's blood plasma was measured in an assay. Data similar to those summarized in the article follow: DC: 118.8, 115.8, 122.3, 115.1, 115.6, 116.9, 113.3, 115.4, 119.5, 115.6, 115.9, 107.9 DC + MK: 105.4, 100.0, 101.1, 99.8, 102.7, 102.6, 97.1, 100.9, 101.9, 104.5, 98.9, 93.5 MC: 102.1, 102.8, 105.8, 98.7, 99.6, 94.7, 102.7, 97.8, 98.8, 99.7, 100.9, 98.6 a. Construct comparative boxplots and study the data. What visual impression do you have from examining these data? b. Analyze the experimental data using ANOVA. If α = 0.05, what conclusions would you draw? What would you conclude if α = 0.01? c. Is there evidence that the dark chocolate increases the mean antioxidant capacity of the subjects' blood plasma? 3. Explain, in terms of Type I error, why it is not a good idea to investigate whether mean antioxidant capacity in 2(c) before hypothesis in 2(b).

Madhur L.

an-investigator-is-interested-in-the-effect-of-chocolate-on-depression-he-thinks-that-chocolate-has-a-beneficial-effect-on-depression-however-he-believes-that-the-beneficial-effect-will-only-87197

An investigator is interested in the effect of chocolate on depression. He thinks that chocolate has a beneficial effect on depression; however, he believes that the beneficial effect will only be present for people without a sense of humor. To test this basic idea, he randomly assigns the 30 subjects in the study to one of three levels of an independent variable: chocolate. Ten subjects get a high dosage of chocolate, ten subjects get a low dosage of chocolate, and ten subjects do not get chocolate. Each subject is also assigned to one of two levels of a second independent variable: sense of humor. Subjects are either classified as having or not having a sense of humor based on scores on the Puns and Quips Appreciation Test (PQAT). The dependent variable consists of scores on the Depression Questionnaire (DepQ). Higher scores on the depression questionnaire reflect higher levels of depression. The investigator predicts that a significant interaction between chocolate and sense of humor will be observed. Specifically, he predicts that no effects of chocolate will be observed on depression for subjects who have a sense of humor. He predicts that a significant effect of chocolate will be observed for subjects that do not have a sense of humor. Furthermore, he predicts that for subjects who do not display a sense of humor, the mean of subjects getting a low or high dose of chocolate will be significantly less than the mean of subjects getting no chocolate. For subjects who do not display a sense of humor, subjects getting a high dose of chocolate are predicted to have significantly lower levels of depression than subjects getting a low dose of chocolate. Run a factorial ANOVA to test his hypotheses and include the SPSS output in your submission (copy and paste on Word Doc file). Use the data set CHOCOLATE. (2 points) Write your conclusion (3 points) Bonus: What are the null hypotheses in a 2x2 factorial design? (1 point each) Data Attached Below: SubjectID chocolate humor DepQ 1 3 4 12 2 2 9 8 3 1 9 14 4 1 9 12 5 2 4 23 6 2 4 15 7 1 12 27 8 3 5 16 9 2 11 35 10 2 7 9 11 1 7 32 12 1 6 24 13 3 6 14 14 2 1 30 15 1 5 17 16 1 8 9 17 3 1 32 18 3 2 29 19 1 6 19 20 1 8 8 21 3 5 26 22 3 3 10 23 2 8 12 24 2 12 8 25 3 10 19 26 2 11 21 27 3 2 31 28 3 3 29 29 1 10 33 30 2 7 9

Madhur L.

dark-chocolate-for-good-health-a-study-47-examines-chocolates-effects-on-blood-vessel-function-in-he

Dark Chocolate for Good Health A study $^{47}$ examines chocolate's effects on blood vessel function in healthy people. In the randomized, doubleblind, placebo-controlled study, 11 people received 46 grams (1.6 ounces) of dark chocolate (which is naturally flavonoid-rich) every day for two weeks, while a control group of 10 people received a placebo consisting of dark chocolate with low flavonoid content. Participants had their vascular health measured (by means of flow-mediated dilation) before and after the two-week study. The increase over the two-week period was measured, with larger numbers indicating greater vascular health. For the group getting the good dark chocolate, the mean increase was 1.3 with a standard deviation of $2.32,$ while the control group had a mean change of -0.96 with a standard deviation of 1.58 . (a) Explain what "randomized, double-blind, placebo-controlled study" means. (b) Find and interpret a $95 \%$ confidence interval for the difference in means between the two groups. Be sure to clearly define the parameters you are estimating. You may assume that neither sample shows significant departures from normality. (c) Is it plausible that there is "no difference" between the two kinds of chocolate? Justify your answer using the confidence interval found in $\operatorname{part}(\mathrm{b})$

Statistics Unlocking the Power of Data

Inference for Means and Proportions

Confidence Interval for a Difference in Means


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Transcript

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00:01 Hello students for the given value of dc, dc plus mk and mc we are provided with their value and based on that first we need to construct a comparative box plot which we can visualize visually analyze the data for each chocolate type that is dark chocolate, dark chocolate with milk and milk chocolate.
00:21 The box plot here we have drawn will provide a summary of distribution including the median quartile and any potential outlet.
00:30 From examine the given box plot we can observe the following visual impression.
00:37 So the first one is the median antioxidant capacity appears to be highest for dark chocolate followed by dark chocolate plus milk and then milk chocolate.
01:07 The interquartile range that is iqr seems to be relatively consistent across chocolate types.
01:22 Chocolate types...
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