In journal articles about clinical experiments, it is common to include baseline

Question

In journal articles about clinical experiments, it is common to include baseline characteristics of the different treatment groups so that they can be compared. In article about the effects of different diets, a table of baseline characteristics showed that 40 subjects treated with a particular diet had a mean age of 42 years with a standard deviation of 10 years. Also, 40 subjects treated with a different diet had a mean age of 47 years with a standard deviation of 7 years. Use a 0.05 significance level to test the claim that subjects from both treatment groups have ages with the same amount of variation. How are comparisons of treatments affected if the treatment groups have different characteristics? an What are the null and alternative hypotheses? P 262 2.2 B. Ho' PO2 2 O1 ldentify the test statistic. Fa | (Round to two decimal places as needed.) Use technology to identify the P-value The P-value is

Explanation / Answer

HypothesisL option B is correct

F =(s1/s2)2 =(10/7)2=2.04

for (n1-1=39) degree of freedom in numerator and (n2-1=39) degree of freedom in denominator ; and for above test staT ; p value =0.0142

reject Ho . there is sufficient evidence ,...........have ages with same amount of variation

option A is correct

Related Questions

Navigate

• Browse (All)
• Browse I
• Subjects

---

---

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