Torn ACL Having at least one 15-minute warm-upsession per week resulted in a drastic reduction in tearsin the anterior cruciate ligament (ACL). In a studyinvolving about 4500 adolescent girls’ soccer players inSweden, one group was randomly assigned to warm upwith a neuromuscular exercise session. This group had64% fewer ACL tears than the control group.a) Is this an experiment or an observational study?Explain why.b) Identify the treatments in this study. What is theresponse variable?c) Give one statistical advantage of using only Swedishgirls who played soccer in this study.d) Give one statistical disadvantage of using onlySwedish girls who played soccer in this study.

Q: the birth weight (gm) of the infants between MEG and HEG ? H0: ________________________________…

A: n1 = 21n2  = 21   x1 = 3590.5x2 = 3650.7   s1 = 532s2 = 515.8

Q: In two-way ANOVA, identify the statistic that is used as a measure of variationa. among the sample…

A: (a)Sum of squares for factor A:The component SSA represents the variation among the sample means for…

Q: A) Does this provide statistically significant evidence at the 1% significance level that the rule…

A: Let p be the population proportion of high school athletes who required reconstructive surgery.…

Q: Explain the Potential Outcomes and the Average Causal Effect of using randomized controlled…

A: A potential outcome is the outcome for an individual under a potential treatment. And the casual…

Q: Distinguish between observational and experimental types of studies?

A: An observational study is a study in which researchers simply collect data based on the data…

Q: students are tested again at the end of the year. Their test scores revealed an average improvement…

A: students are tested again at the end of the year. Their test scores revealed an average improvement…

Q: O H: At least two of the population means are equal. H: At least two of the population means are…

A: Given that ,  How long it takes paint to dry can have an impact on the production capacity of…

Q: Education Less than high school 3599 High school graduate/GED 8000 Some college/tech school 10,408…

A:

Q: Bullying Bullying is a problem at any age but especially for students aged 12 to 18. A study showed…

A: Given No. of students bullied in private school, x1=24 No. of students bullied in public school,…

Q: What is the difference between a fixed effect factor and a random effect factor?

A: The fixed effect factor is defined as when data has been gathered from all the levels of the factor…

Q: A forensic psychologist is interested in assessing the prevalence of major depressive disorders…

A:

Q: researcher is using a one-way ANOVA to see whether a significant difference can be found between 3…

A: Given that  A researcher is using a one-way ANOVA  Claim : whether a significant difference can be…

Q: s St. John's wort effective in treating attention-deficit/hyperactivity disorder (ADHD) in hildren…

A: Here  Experiment is conducted to check the effect of John's wort on the ADHD score of childern....

Q: Due to the economy, are Americans staying in their first professional job longer? This was a ques-…

A: Given that,

Q: In order to study a survey on “How do professionals stay on top of their careers?”, a research…

A: Given that,  Number of members interviewed=935  Number of members engaged in professional networking…

Q: ferroni Correc

A: Given,

Q: athletes in different sports vary in terms of their readiness for college? Reported here are college…

A: Solution:

Q: Describe about STANDARDIZED EFFECT SIZE, COHEN’S d (TWO RELATED SAMPLES)?

A: Cohen’s d: The Cohen’s d is the ratio of the difference in means to the pooled standard deviation of…

Q: The article "Display of Health Risk Behaviors on MySpace by Adolescents"+ described a study in which…

A: (a) The study described is an observational study.Explanation: In an observational study,…

Q: Working memory scores of those with anxiety are compared to working memory scores of those without…

A: Factorial design is a statistical model that consists of two or more factors each with different…

Q: The General Social Survey (GSS) collects data on demographics, eduction and work, among many other…

A: Solution

Q: Whirling disease is a deadly disease that affects trout in Montana riversIn a follow-up to a 2006…

A: The relative risk of whirling disease for rainbow trout compared to brown trout can be calculated as…

Q: A researcher compares differences in positivity between participents in a low, middle, or upper…

A: The one-way between-subjects ANOVA is a statistical technique used for the comparison of more than…

Q: An epidemiologist found five cases of “big toe cancer” in the Yukon Territory. Because there were…

A: Note: Since we are authorized to answer only up to 3 subparts, we are answering first three…

Q: significance level, do the data provides sufficient evidence to conclude that the  mean calcium…

A: Here use one sample t test  Because population standard deviation unknown and sample size also…

Q: Explain the reasons to study randomized controlled experiments?

A:

Q: Researchers investigate how the presence of cell phones influence the quality of human interaction.…

A: Given information: Researchers are interested to study the effect of the cell phones quality of…

Q: Which uses a group of people with different exposures and follows them over time?     Cohort…

A: Given Information: Which uses a group of people with different exposures and follows them over time.…

Q: A researcher compares differences in positivity between participants in a low-, middle-, or…

A: A researcher compares differences in positivity between participants in a low-, middle-, or…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.