A researcher is presenting the results of a randomised trial investigating the use of a fungal infection in the reduction of a weed.  Plants infected with the fungus were compared with control plants.  Plants were in pots, and after a two-month growth period, the weeds in each pot were cut and the fresh weight of the weeds in grams was recorded. The researcher provides the following summary statistics: Treatment Number Mean Standard deviation Fungal 20 19.4 6.5 Control 20 23.4 7.2 She also presents some graphs of the data.  Assuming the summary statistics are correct, which one is the correct graph of the data from the set below?   单项选择题

A

C

B

A

C

D

D

B

登录即可查看完整答案

我们收录了全球超50000道真实原题与详细解析,现在登录,立即获得答案。

类似问题

You want to draw inferences about whether two samples were drawn from a single population, or from two populations. Which statistical test could potentially be appropriate?

Question textUsing ONE word from the text, fill in the missing spaces in the following summary of the article. The author, David Hone acknowledges that zoos cannot be perfect. However, he points out that their work in conservation helps them to provide excellent sanctuaries for animals that can potentially suffer from the threat of Answer 1 Question 7[input] in the wild. He also goes on to state that school education programs have also improved greatly with more Answer 2 Question 7[input] communication in addition to outreach work. His third key point is the contribution that zoos make to Answer 3 Question 7[input] in various areas. In conclusion, Hone further justifies zoos by arguing that the world would be devalued without the role they have across the globe.

Question textFill in the gap with ONE word from the text. Research can help to reduce the amount of Answer 1 Question 6[input] between fauna and humans.

Decide if the following statement is TRUE, FALSE or NOT GIVEN according to the text. Compared to the past, zoos regularly provide education in schools.

更多留学生实用工具

加入我们，立即解锁 海量真题 与 独家解析，让复习快人一步！