>>>>Recently one of my students asked me to help with statistics. So, we work with Kaplan AP Statistics. There I see:
>>>>"...decrease the margin of error by a factor of 1/4...."
>>>>
>>>>Just curious, is this passage completely understandable for those of you how was born in English language environment?
>>>
>>>Nope. Dragan has it right. Read as written, it means to multiply the margin of error by a factor of 4.
>>>
>>>Tamar
>>
>>Looks like it is not the case. They want to get 1/4 of the original. See their explanation attached.
>
>The text on your image is fine - "in order to have the margin of error 1/4 of the original" is regular. Now I wonder where did "...decrease the margin of error by a factor of 1/4...." come from?


See attached.