Suppose in a two-way ANOVA table,the total sample size N is 30, factor Ahas 3 levels, and the degrees of freedom for interaction is 8. What is the degrees of freedom for error?
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 quality control inspector at a candy factory must ensure all three flavors of a candy are being…
A: Given : Total candy = 90 Cherry = 32 Orange = 39 Grape = 19
Q: When the sample size is 15 and you are doing a t test, the number of degrees of freedom is 15. True…
A: Given that Sample size n =15 Degree of freedom =df =n-1
Q: A college department pilots a New program with 9 of its 20 students and compares income in each…
A: The following data is provided: New Old 144 98 18 64 45 80 70 23 341 0 66 11 34…
Q: In the US, 43.5% of all people have type O blood, 39.7 % have type A blood, 11.9% have type B blood…
A: Outcomes Frequency O1271A1123B328AB158Total2880
Q: A. Please explain how the three types of T tests (One Sample t test, Independent Samples t test,…
A: We have to explain three types of t test One Sample t test, independent sample t test and paired…
Q: What is the difference between independent samples and dependent samples?
A: Dependent samples: The two samples are said to be dependent if there exist an effect of one on…
Q: Suppose Diana, an educational researcher at a local university, wants to test the impact of a new…
A: Diana selects a simple random sample of 68 freshmen and divides them into 34 pairs. we have given,…
Q: A researcher claims that the percentage of infants who receive immunizations is less than 80%. She…
A:
Q: What is the difference between a simple random sample and systemic sample?
A: In a systematic sample, the only samples possible are those including every kth item from the random…
Q: Suppose that you want to compare the means of three populations by using one-way ANOVA. If the…
A: One-way ANOVA is performed to compare the three population means with the sample sizes of 5, 6 and…
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: In the US, 44.8% of all people have type O blood, 40.8% have type A blood, 11.3% have type B blood…
A: a. The expected frequencies are, Outcome Frequency Proportion Expected frequency O 1317 0.448…
Q: What is the formula to be used to determine the total possible random samples?
A: Let the population size be N Sample size be n
Q: illustrates the effect of sample size on the power of a two-sample t test?
A: A test of hypothesis consists of 2 hypotheses: the null, H0, and the alternative, H1. For a sample…
Q: In the US, 43.5% of all people have type O blood, 39.7% have type A blood, 11.9% have type B blood…
A: Outcomes Frequency O1271A1123B328AB158Total2880
Q: Comfort Food Magazine states the average calories of a medium size hot dog is 209. The number of…
A: (a) Here, the value of α is provided. Hence, the two possible answers are α is provided and Asks if…
Q: A clinical psychologist studies the effects of tonsillectomy and adenoidectomy on aggressive…
A: It is provided that there are three groups for which the number of observations in each group are nA…
Q: The sample size is 40, why not use the " one mean z-test?
A: Sample size n=40 Sum of observations ∑x=1200 The sum of the square of observations ∑x2 85000…
Q: What is the difference between an outcome and sample space
A: An outcome refers to the result of a experiment . Here experiment tends to actions that can have…
Q: Online gamers are divided into different age groups. A random sample from each group is selected and…
A: From the given information we want to know method of sampling.
Q: O Blood type and income are dependent. d. The degrees of freedom = e. The test-statistic for this…
A: Outcomes frequency O1271A1123B328AB158
Q: What are the steps for finding the relative frequency of sample means above or below a specified…
A: The sampling distribution of sample means is approximately a normal distribution because of the…
Q: Provide an example (different from the ones considered in this section) of a procedure based on a…
A: A researcher wants to test the effectiveness of the training program conducted for students to…
Q: You intend to conduct an ANOVA with 7 groups in which each group will have the same number of…
A: There are 7 groups in which each group would have the sample number of subjects n=10, then the total…
Q: If we would like to decrease the margin of error without changing the sample size, what must happen?
A: We have to find what to do to decrease margin of error.
Q: Why would a researcher choose to conduct an One-Way ANOVA rather than multiple independent samples…
A: Solution-: Why would a researcher choose to conduct an One-Way ANOVA rather than multiple…
Q: Why is it necessary for a sample to be obtained randomly rather than conveniently?
A: Since we know that Random sampling makes. sure that the findings you get from your sample should be…
Q: Sally, a recent graduate of the University of Arkansas, accepted a position as an event coordinator…
A: Given Data : For Sample 1 x̄1 = 1629.90476 s1 = 11.1803 n1 = 25 For…
Q: is it a cluster sample
A: Cluster Sampling: A heterogeneous population is divided into homogeneous groups and which is used…
Q: What is the benefit of using a factorial design over multiple one-way ANOVAs?
A: step 1: The factorial designs is an experiment in which different factors at different levels are…
Q: How do a paired-sample design and an independent-sample design differ?
A: A paired-sample design and an independent-sample design are two different types of research designs…
Q: What is the Importance of Equal Sample Sizes?
A: The t-test and ANOVA assume that the sample sizes are equal. There is an importance that the two…
Q: Very briefly, explain if the value in the dominator of the one sample and independent sample t test…
A: Major difference is the degrees of freedom
Q: When is it appropriate to use a pooled sample test?
A: It is to determine when there is to use pooled sample test. There are some situation in testing we…
Q: Why do all cells in two-factor studies should have equal sample sizes?
A: Two factor or two-way ANOVA compares the differences of mean between groups which have split into…
Q: Suppose an instructor would like to know if there is difference in the performance of her two…
A: Let us consider two population with mean and and standard deviation and respectively. If sample…
Suppose in a two-way ANOVA table,the total
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- A survey of 2255 randomly selected US adults found that 51% said they know all or most of their neighbors. Does this provide evidence that more than half of US adults know most or all of their neighbors? Use 5% significance level.Discuss the basic strategy for comparing the means of two populations based on a simple random paired sample.A researcher assures that in his country, on average, the salary of workers is less than $5000.00. He takes a sample of 7 workers and finds that their salary is: $3900.00, $5100.00, $3100.00, $5500.00, $2700.00, $4500.00, $4100.00 Can you be sure at the 0.02 level of significance that the researcher is correct? Choose 1. The correct conclusion2. The correct interpretation Select one:to)1. H0 is rejected2. With a confidence of 98% it can be ensured that the average wage of the workers is not less than $5000.00b)1. H0 is not rejected2. With a confidence of 98% it can be ensured that the average wage of the workers is not less than $5000.00c)1. H0 is not rejected2. It can be ensured, with 98% confidence, that the average wage of the workers is less than $5,000.00d)1. H0 is rejected2. It can be ensured, with 98% confidence, that the average wage of the workers is less than $5,000.00
- Describe a method for getting a fair and unbiased simple random sample of 12 people if you have a group of 200 people to choose from.If we are examining 8 different pairwise comparisons and we do not adjust for multiple comparisons, what is our probability of making an incorrect statistical decision? ExplainSuppose that you want to compare the means of several treatments in a randomized block ANOVA. If given the choice between using the randomized block ANOVA test and the Friedman test, which one would you choose if outliers occur in the sample data? Explain your answer.
- A random sample of 1100 potential voters was randomly divided into 2 groups. Group 1: 500 potential voters; no registration reminders sent; 248 registered to vote Group 2: 600 potential voters; registration reminders sent; 332 registered to vote Do these data support the claim that the proportion of voters who registered was greater in the group that received reminders than in the group that did not? Use a 1% level of significance.Primary seat belt laws allow police to stop a motorist for not wearing a seat belt. According to the National Highway Traffic Safety Administration, the percentage of drivers wearing seat belts in the Limpopo province was 68.5% in 2017 and 72% in 2018. Assume that these percentages are based on random samples of 1000 drivers in 2017 and 1050 in 2018. Suppose you must test at 5% level of significance whether the proportion of all drivers in Limpopo province who used seat belts in 2017 is lower than that for 2018. 1 Questions I) Determine the alternative hypothesis to be tested: II) Determine the value of test statistic: III) Determine the p-value for this problem: IV) the conclusion Since Z=-1.734 is greater than Z subscript 0.05 end subscript equals negative 1.645, we then reject the null hypothesis at 5% level of significance and conclude that the proportion of all drivers in Limpopo province who used seat belts in 2017 is lower than that for 2018. b) Since Z=-1.734 is less…z stat please A survey of 1000 adults from a certain region asked, "If purchasing a used car made certain upgrades or features more affordable, what would be your preferred luxury upgrade?" The results indicated that 58% of the females and 51% of the males answered window tinting. The sample sizes of males and females were not provided. Suppose that of 600 females, 348 reported window tinting as their preferred luxury upgrade of choice, while of 400 males, 204 reported window tinting as their preferred luxury upgrade of choice. Complete parts (a) through (d) below. a. Is there evidence of a difference between males and females in the proportion who said they prefer window tinting as a luxury upgrade at the 0.05 level of significance? State the null and alternative hypotheses, where π1 is the population proportion of females who said they prefer window tinting as a luxury upgrade and π2 is the population proportion of males who said they prefer window tinting…
- You intend to conduct an ANOVA with 5 groups in which each group will have the same number of subjects: n = 15. (This is referred to as a "balanced" single-factor ANOVA.) What are the degrees of freedom for the numerator? d.f.(treatment) = What are the degrees of freedom for the denominator? d.f. (error) =One advantage of a within subjects ANOVA is that the participants serve as their own comparisons true or false?Provide one sample problem with complete manual solution about Design of Experiments with SEVERAL FACTORS.