Verizon LTE 4:19 PM canopy.uc.edu 72% Question 1 Which one of the statements bel

Question

Verizon LTE 4:19 PM canopy.uc.edu 72% Question 1 Which one of the statements below is true about a one-way ANOVA F-test? The one-way ANOVA F-test is used to compare the proportions of OThe nuil hypothesis is hat several populations have the same mean. O The nuil hypothesis is that the Factor is independent of the Error The null hypothesis is that several populations have the sane vinande An investigator is interested in evaluating four different methods of instructing children in dental hygiene. Iwenty children are randomly selected and assigned to four groups of five children each. Each group is instructed using one of the four methods. At the end of the instruction period each child is given a hygiene performance score based on both a written and practical exam. An Analysis of Variance (ANOVA)s carried out on the mean scores for the four methods The degrees of freedom for the ANOVA F statistic comparing mean hygiene performance score are (the first number is for the numerator and the second is for the denominator) The atemative hypothesis for the ANOVA F test in number 2 is ^the population mean hygiene performance scores for the dneret Othe population variances of the hygiene performance scores for the Othe population mean hygiene performance scores for the diflerent othe population mean hypene performance scores forthe dferent are all dferent methods are al the same The ANOVA test for 82 gives F 2.93 (P 0.065). What is the correct conclusion? OA We can reject the nul hypothesis- the means are not all the same O We do net have evidence to assert that the different methods have O The mean scores for the different methods are not all dferent Because F >2.the ANOVA test is not valid since the va ances ofthe Question 5 What type of exercise results in the most weight loss? One study randomly assigned adult subjects to one of 3 exercise treatments (1) a single long exercise period five days per week: (2) several ten-minute exereise periods interspersed throughout the day, frve days per week; and (3) several ten-minute periods on hone treadmil, five days per week Here are the summary statistics about weight loss (in kilograms) after six months of treatments, and the one way ANOVA table for this study

Explanation / Answer

Question 1-

The answer is option B that is the null hypothesis is that the several populations have the same mean.

Question 2-

The answer is D that is 3 and 19.

Question 3-

The answer is C that is the population mean hygiene performance scores for different method are not all the same.

Question 4-

Here p=0.065 > alpha = 0.05. Thus we fail to reject the null hypothesis. So the correct answer is option C that is the mean scores for the different methods are not all different.

Related Questions

Navigate

• Browse (All)
• Browse V
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.