2. Suppose you want to test the factors that potentially affect the germination of bean. | (a) What would you use as a response variable in this experiment? How would you measure the response? (b) List the potential factors and their potential levels. (c) List all of the potential sources of variability that could impact the response.

Q: Explain the difference between the one-way fixed effects model and the one-way random effects model.

A:

Q: Suppose a population has three values 13, 17 and 24. What is its variance?

A: Given: n=3 The mean of the data is obtained as below: Mean=∑xn=13+17+243=543=18 The mean is 18.

Q: Analysis of the output of a process has suggested that the variability is nonrandom on several…

A:

Q: 2) Provide an example of how the one way ANOVA may be used

A: One way ANOVA

Q: What is the advantage of removing the variability caused by individual differences in a…

A: A within-subject design is a type of experimental design in which all participants are exposed to…

Q: pestation period is 16 days. Suppose you have a sample of 27 Syrian hamsters who were exposed to…

A: probability of getting the t statistic or something can be calculated as follow

Q: 1. What are the relative strengths and weaknesses of using range as a measure of variability?

A: To discuss: What are the relative strengths and weaknesses of using range as a measure of…

Q: 2. A one way ANOVA uses one independent variable. ( true or fuels)

A: True

Q: 2) If all of the values in a set of data were doubled, what would happen to the variance?

A: We need to use the concept of variance.

Q: 1. Describe the sources of variability in a random experiment

A: If in each trial of an experiment conducted under identical conditions, the outcome is not unique,…

Q: In AÑOVA, when we want to "control for" variation in the response variable that is due to a factor…

A: Randomised block ANOVA; The aim is to minimize the variance among units within blocks relative to…

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: 4) Many smartphones, especially those of the LTE-enabled persuasion, have earned a bad rap for…

A: a)To test:H0:σ12=σ22H0:σ12>σ22 where σ12 and σ22 are the population variances of battery usage on…

Q: A quality-control manager was concerned about variability in the amount of an active ingredient in…

A: Given data: Sample size = 21 To find: What is the probability that the sample variance of the amount…

Q: Explain the Sources of variability and F ratios in one- and two-factor ANOVAs.

A:

Q: If you want to reduce the amount of variance present in an independent-measures (one-way) ANOVA, you…

A: ANOVA is a parametric inferential procedure.

Q: What does this information tell you about the variability of the student's performance on the…

A: Given The data is as follows:

Q: One advantage of using a control group with a placebo inan experiment is that the experiment will…

A: The placebo effect is something that appears to be factual in medical terms, but it actually isn’t.…

Q: What mathematical operations could I do to every score in my distribution list that would have no…

A: Mathematical operation  Adding/subtracting

Q: 4) Explain why outliers are weighted higher in the Variance equation WIR. n-1 (xi -x)2 Is this a…

A: Outliers are the data points that does not follow the common trend of the data. Data with many…

Q: 2. In studying the effect of a drug for treating patients with respiratory problems, a researcher…

A:

Q: 2. Various studies done by Ms Makhalemele from SMU Chemistry department have shown the benefits of…

A: Solution : Pooled Standard Deviation = 18.42

Q: What is the predicted response value?

A: Given: x y 67.7 -25.7 72.2 -5 55.8 21.3 64.1 11 70.9 64.9 61.6 -25 65.3 84.6…

Q: What is the expected value and variance of flight time?

A: Given that x~u (120 ,140 ) Find Expected value =? Variance =?

Q: A. If the results were statistically significant, can the results of this study be generalized to a…

A: The study involved 350 volunteers over the age of 60 years. Each subject was assigned to a treatment…

Q: What statistical method would you use when your variables are nominal and your measure of central…

A: Nominal variables are qualitative variables with categories having no natural ordering in it. For a…

Q: Consider the outcome of serum concentration vitamin D and the predictor cardiorespiratory fitness.…

A: Confounding Variables :  A confounding variable is an “extra” variable that you didn’t account for.…

Q: What are Sources of variability and F ratios in one- and two-factor ANOVAs?

A:

Q: In the "recipe for a test statistic" the variability that goes into the treatment effect comes from:…

A:

Q: 2. In studying the effect of a drug for treating patients with respiratory problems, a researcher…

A: The Following data is given:   Respiratory Test 2   3.4   3.4   3.3   3.4   3.3   3.3…

Q: find out Microsoft’s alpha, beta, and the fraction of its variance attributed to market risk.

A: To find the required alpha and beta values, we need to fit a regression model between Microsoft's…

Q: 28. In a Two-Way ANOVA, it is possible to get a significant interaction effect even if the main…

A: Given info: In a two-way ANOVA, it is possible to get a significant interaction effect even if the…

Q: Suppose researchers want to investigate if experiencing mother nature more often reduces a person's…

A: A) The researchers can conduct a experiment using completely randomised design (CRD) where the…

Q: What is the predicted response value? y =

A: Given Regression Equation : and,

Q: What do we call variance in the ANOVA equation, and what notation do we use to represent them?

A: Given information: The information about ANOVA is given.

Q: Based on your understanding of how we calculate an ANOVA, what type of variance is most important to…

A: ANALYSIS OF VARIANCE (ANOVA)                   Analysis of variance (ANOVA) is a…

Q: What is the variance of random variables X, the outcome of rolling a fair die

A: The sample of rolling a fair die is {1,2,3,4,5,6}.

Q: What is the difference between treatment variability and error variability in factorial Designs?

A: Let us consider the simplest factorial design --> 2 * 2 factorial design. Here, we have two…

Q: A researcher is interested in investigating the relationship between sugar consumption and weight…

A: Given Information: A researcher is interested in examining the relationship between high school…

Q: What is the difference between the predictor variable and the criterion variable?

A: In theory of statistics, dependent variable is the criterion or response variable.

Q: Think of a research scenario for which either 1-way or 2-way ANOVA would be needed to analyze the…

A: ANOVA is splitting up of total variance into variance due to several factors and variance due to…

Q: How does the AQL relate to producer’s risk () and theLTPD relate to consumer’s risk ()?

A: AQL is Acceptance Quality Level and LTPD is Lot Tolerance Percent Defective.

Q: 2. Why is it necessary to have more than one method for measuring central tendency?

A: Measures of center: Mean: The arithmetic mean (also called the mean) is the most commonly used…

Q: Analysis of variance is a technique used to conduct a hypothesis test to compare three or more…

A: Solution-: Analysis of variance is a technique used to conduct a hypothesis test to compare three or…

Q: If, in an analysis of variance, you find that MSTR is greater than MSE, why can you not immediately…

A: While performing Analysis of Variance (ANOVA), we calculate the test statistics which is the ratio…

Q: The difference between an observed value and a predicted value of the response variable is called a…

A: Residual: The difference between the observed value of the response variable and actual value of the…

Q: 13. What is the Relative Risk for these data?

A: The given data set is, The formula for calculating the relative risk is,