A study produced the following result:RR 0.4 (95% CI 0.2 to 0.6).What information can you gather from this result?Question 7Answera.The intervention achieves a better outcome than the comparison, although there is not a statistically significant difference between the groupsb.The intervention achieves a better outcome than the comparison, with the difference statistically significantc.The intervention achieves a better outcome than the comparison, it is not a statistically significant difference, and the sample size is larged.The intervention achieves a better outcome than the comparison

A weight loss study found that the intervention group had an average weight loss of 4 kg as compared to the control group.The confidence interval showed the range of possible results to be from 12kg lost to 4 kg gained.What is the best interpretation of this information?Question 9Answera.The control group lost more weight than the intervention group and this was a significant result.b.The intervention resulted in an average weight loss of 4kg and this result was significant.c.The intervention did not work.d.The intervention resulted in an average weight loss of 4kg but this result was not significant.

A researcher conducts a study with a large sample size and finds a statistically significant result. However, the effect size is very small. What is the implication of this finding?  A. The study has high statistical power  B. The results are practically significant  C. The findings may not have real-world importance  D. The study has a Type II Error

Time left 0:07:23Question 8Not yet answeredMarked out of 1.00Flag questionTipsQuestion textA trial examining a new intervention and measuring the outcome of stroke had a final result of:RR 1.2, 95%CI 0.9 to 1.5.Select the best interpretation of this result.Question 8Answera.The intervention increased the average risk of stroke by 20% and the real result is likely to lie between a 10% decrease and a 50% increase. The result is not significant.b.The intervention increased the average risk of stroke by 20% and the real result is likely to lie between a 10% decrease and a 50% increase. The result is significant.c.The intervention decreased the average risk of stroke by 20% and the real result is likely to lie between a 10% increase and a 50% decrease. The result is not significant.d.The intervention decreased the average risk of stroke by 20% and the real result is likely to lie between a 10% increase and a 50% decrease. The result is significant.

A researcher is planning to replicate a study that previously failed to reject the null hypothesis. What might she do to increase her chance of finding a true difference between the comparison groups?1 pointIncrease the sample size.Decrease the effect size.Decrease the sample size.Decrease the α from .05 to .01.

Increasing which of the following can improve the power of a study?Question 4Answera.The confidence level.b.The sample size.c.The significance level (alpha).d.The standard error of the mean.