? Hany st les have suggested a ink between .xercise and lealthy tones because es

Question

? Hany st les have suggested a ink between .xercise and lealthy tones because eserse stresses the ones and this cam them to become stronger. A study randemited sub ects to a control-addtional exe ehe), impact, or high impact aerobkcs and measured the change in bone density. The ANOVA p value was 0.023. Which of the follewing is correct? O The results could be suspect because 30 people represents teo small of a sample to ensure that the results are representatdive. ?The significant pvabe only indicates that there is evidence that at hast one pair of means are different. It doesn't inacate which of the means are dimerent O The Analysis of Variance (ANOVA) method tests to see if the varlances in the groups could be the same. O A multiple comparison procedure is needed because the p-value indicates that the means could all be the same a. Many studies have suggested a link between exercise and healthy bones because exercise stresses the bones, and this causes them to become stronger. A study randomized 30 subjects to a control (no additional exercise), impact or high impact aerobics and measured the change in bone density Th. stud? condded ? its report, there mas strong evidence from the ANOVA that the wares under hi the twe otfher greups t-0.023) which of the folewing is correct O The concusion is wrong because Analysis of Variance (ANOVA) methed compares the variance of the individual scores O The conclusion is wreng because ANOVA tests for equality of means and not indlvidual scores O There was a 2.3% dmereno in mean steres among the roups. O Ahma 2.y% of idvihsals had lower scere-under the Nyk-mpaa regine than the contro. roup. apat Hrobks were larger than ehe An ANOVA F test is an extenslon of a O two sample test of prepotion O two sangle t test O two sample z test ? Ore reason we use the Borderrani method for m..ple conçaison. isthat ? as we perturm more comparissen, the family wh·@fato increases. O the individual comparisons are not independent O Neither choice is correct. S. There are three greups for which a recearcher wants to pertorem an ANOVA They have standand deviations s 2.3, s "3.4, and ss6.4. The plots of the data indicate all samples New Wi-Fi connection O No ?Yes O Not enough information to tell 12:57 00 Sart: 10:15 AM

Explanation / Answer

1)
p-vale < 0.05
we reject the null hypothesis

hence
option B) is correct

2)

option B) is correct
we say that there is evidence that at least one paire of means are different , not any particular pair

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