Please help it's not graded An experiment to evaluate the effectiveness of the type of snack and children'sperception of satiation was designed so that subjects aged 10 to 13 years wererandomly assigned a snack that was of the exact same ingredients but describeddifferently. The first group had their snack described as healthy and full of vitamins,the second group had their snack described as tasty, the third group were given asnack without any description whatsoever. Thirty minutes after finishing the snack,subjects were asked to rate their hunger on a scale of 1 to 10.The results are summarized in the table:ANOVA: Single FactorSUMMARYGroupsHealthyTastyNo DescriptionANOVASource of VariationBetween GroupsWithin GroupsTotalCount121314SS17.4615462.8974480.35897Sum Average Variance62 5.16671.969746 3.53851.935956 4.00001.3846dfMSFP-value2 8.730769 4.997146 0.01215636 1.74715138Is it reasonable to use the assumption of equal standard deviations when we analyzethese data? Briefly explain your answer.AV

Answered: An experiment to evaluate the…

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter4: Equations Of Linear Functions

Section4.5: Correlation And Causation

Problem 11PPS

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What is meant by the sample space of an experiment?
What is an experiment?
Many people take ginkgo supplements advertised to improve memory. Are these over-the- counter supplements effective? In a study, elderly adults were assigned to the treatment group or control group. The 104 participants who were assigned to the treatment group took 40 mg of ginkgo 3 times a day for 6 weeks. The 115 participants assigned to the control group took a placebo pill 3 times a day for 6 weeks. At the end of 6 weeks, the Wechsler Memory Scale was administered. Higher scores indicate better memory function. Summary values are given in the following table: Ginkgo 104 5.7 0.6 Placebo 115 5.5 0.5 Perform the appropriate test to determine if taking 40mg of ginkgo 3 times a day is effective in increasing mean performance on the Wechsler Memory Scale. > Is the study observational or designed experiment? > Can you conclude association or causation with this type of study? > Is this a matched-pair dependent test or two-sample independent test? O Null hypothesis: OAlternative…
Many people take ginkgo supplements advertised to improve memory. Are these over-the- counter supplements effective? In a study, elderly adults were assigned to the treatment group or control group. The 104 participants who were assigned to the treatment group took 40 mg of ginkgo 3 times a day for 6 weeks. The 115 participants assigned to the control group took a placebo pill 3 times a day for 6 weeks. At the end of 6 weeks, the Wechsler Memory Scale was administered. Higher scores indicate better memory function. Summary values are given in the following table: N x̄ s Ginkgo 104 5.7 0.6 Placebo 115 5.5 0.5 a) Based on these results, is there evidence that taking 40mg of ginkgo 3 times a day is effective in increasing mean performance on the Wechsler Memory Scale? b) Write a brief report on your findings.
Many people take ginkgo supplements advertised to improve memory. Are these over-the- counter supplements effective? In a study, elderly adults were assigned to the treatment group or control group. The 104 participants who were assigned to the treatment group took 40 mg o ginkgo 3 times a day for 6 weeks. The 115 participants assigned to the control group took a placebo pill 3 times a day for 6 weeks. At the end of 6 weeks, the Wechsler Memory Scale was administered. Higher scores indicate better memory function. Summary values are given in the following table: N Ginkgo 104 5.7 0.6 Placebo 115 5.5 0.5 Perform the appropriate test to determine if taking 40mg of ginkgo 3 times a day is effective in increasing mean performance on the Wechsler Memory Scale. > Is the study observational or designed experiment? > Can you conclude association or causation with this type of study? Is this a matched-pair dependent test or two-sample independent test?
a study of the effects of color on easing anxiety cpmpared anxiety test scores of prticipants who completed the test printed on either soft yellow paper or on harsh green paper.the scores for the five participants who cpmpleted the test on the green paper were 20, 26, 28, 21, and 18. the scores for four particiopants who completed the test on green paper were 20, 26, 17, and 24. using the .05 level, one-tailed (predicting lower anxiety scores for the yellow paper), what should the researcher colclude? a. use the steps of hypothesis testing
Many people take ginkgo supplements advertised to improve memory. Are these over-thecounter supplements effective? In a study, elderly adults were assigned to the treatment group or control group. The 104 participants who were assigned to the treatment group took 40 mg of ginkgo 3 times a day for 6 weeks. The 115 participants assigned to the control group took a placebo pill 3 times a day for 6 weeks. At the end of 6 weeks, the Wechsler Memory Scale was administered. Higher scores indicate better memory function. Summary values are given in thefollowing table: N x sGinkgo 104 5.7 0.6Placebo 115 5.5 0.5a) Based on these results, is there evidence that taking 40mg of ginkgo 3 times a day is effective in increasing mean performance on the Wechsler Memory Scale? b) Write a brief report on your findings
A medical researcher wants to test the effectiveness of a new drug in treating a certain disease. They randomly assigned 100 patients to two groups: one group received the new drug, and the other group received a placebo. After a month, they measured the patients' symptom severity on a scale of 1 to 10. The researcher found that the mean symptom severity score for the group that received the new drug was lower than the mean score for the group that received the placebo. How can the researcher test the hypothesis that the new drug is effective in treating the disease? What statistical test should they use?
Researchers wanted to know the effectiveness of a new anti-venom shot. A study was conducted on 245 children who had nonlethal scorpion stings. The ages of the children ranged from 6 months to 18 years old. Each child was randomly assigned to receive a shot of the anti-venom or a placebo shot. Researchers recorded whether or not their condition improved over the next four hours. They found that about 73% of the children who were given anti-venom saw an improvement in their condition whereas only about 23% of the children who were given the placebo saw an improvement in their condition. Identify the population.The population is all children 6 months to 18 years old with nonlethal scorpion stings. Identify the sample.The sample is 245 children 6 months to 18 years old with nonlethal scorpion stings. What is the treatment variable? The treatment variable is the anti-venom shot. What is the response (or outcome) variable?The outcome variable is improvements in their condition.…
A research team wants to investigate the usefulness of relaxation training for reducing levels of anxiety in individuals experiencing stress. They identify 30 people at random from a group of 100 who have “high stress” jobs. The 30 people are divided into two groups. One group acts as the control group they receive no training. The second group of 15 receive the relaxation training. The subjects in each group are then given an anxiety inventory. The summarized results appear below where higher scores indicate greater anxiety. The raw data appear below. Evaluate her experiment using the criteria of p < 0.05. Assume it is a two-tailed test. CONTROLLED 38 40 35 36 35 32 31 30 28 26 24 21 18 34 22 RELAXED 35 32 30 34 30 32 28 27 22 22 18 17 17 25 21
A research team wants to investigate the usefulness of relaxation training for reducing levels of anxiety in individuals experiencing stress. They identify 30 people at random from a group of 100 who have "high stress" jobs. The 30 people are divided into two groups. One group acts as the control group they receive no training. The second group of 15 receive the relaxation training. The subjects in each group are then given an anxiety inventory. The summarized results appear below where higher scores indicate greater anxiety. The raw data appear below. Evaluate her experiment using the criteria of p < 0.05. Assume it is a two tailed test. YSou need to perform the 5 steps in Hypothesis Testing. CONTROLLED RELAXED 38 40 35 36 35 32 31 30 28 26 24 21 35 32 30 34 30 32 28 27 22| 22 18 34 22 18 17 17 25 21
Ellen Davis Jones studied the effects of reminiscence therapy for older women with depression. She studied 15 women 60 years or older residing for 3 months or longer in an assisted living long-term care facility. For this study, depression was measured by the Geriatric Depression Scale (GDS). Higher scores indicate more severe depression symptoms. The participants received reminiscence therapy for long-term care, which uses family photographs, scrapbooks, and personal memorabilia to stimulate memory and conversation among group members. Pre-treatment and post-treatment depression scores are given in the following table. Can we conclude, based on these data, that subjects who participate in reminiscence therapy exercise, on average, a decline in GDS depression scores? Assume that alpha = 0.01. Pre-GDS 12 10 16 2 12 18 11 16 10 14 Post-GDS 11 10 11 3 9 13 8 14 10 12 What is the null and alternative hypothesis…

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