S1, how was it? My answers, please put yours to compare.

[Nancy Dirar]

The mean, median, quartiles and the interquartile range will ALL decrease by 5 minutes
The standard deviation will stay the same.
I'm pretty sure of my answer.

How does IQR decrease :/ like say if q1 was 20 and q3 was 30 the IQR would be 10. Decrease Q1 and Q2 by 5 then IQR of 15 and 25 is still 10?

 

[Nancy Dirar]

Also for Venn diagram question I did a circle in the middle for bus then three circles that overlap with middle circle but no each other I that makes sense? So the part time, full time and contractors were all mutually exclusive but they all overlapped with B.

 

[Mohamed Hussein]

The mean, median, quartiles and the interquartile range will ALL decrease by 5 minutes
The standard deviation will stay the same.
I'm pretty sure of my answer.

Bro the interquartile range doesnt change Q3 and Q1 will BOTH decrease by five.. this will not affect the difference between them

 

[jtbteddy]

Overall, how was the exam for all of you?

 

[Mohamed Hussein]

Also for Venn diagram question I did a circle in the middle for bus then three circles that overlap with middle circle but no each other I that makes sense? So the part time, full time and contractors were all mutually exclusive but they all overlapped with B.

Yeah i did the same

 

[fransmith]

lol why would the IQR change?! its the diffeerence between the upper and lower quartiles and remains constant unless your coding involves multiplication??

 

[Irfan1995]

The IQR stays, the same. Sorry for the confusion

 

[Sana salim]

I got -0.0105 for b in the first q :/ Also, for q4.) I said mean decreased by 5, SD stayed the same, Q1/Q2/Q3 and IQR decreased by 5

no the IQR stays d same

 

[oikoik]

I have a question about the box plot... there were only 2 outliers right? Does anyone remember what the maximum and minimum values were? Were they just the numbers just above/below the outliers?
Also, for the "find the mean and standard deviation" question.... you had to alter the boundaries right??

 

[april100]

That mean and median will decrease and sd will stay the same ;d dont know if its right

The mean, median, quartiles and the interquartile range will ALL decrease by 5 minutes
The standard deviation will stay the same.
I'm pretty sure of my answer.

Is it necessary to say hw much each will decrease by? Coz i didn't? :/ How many marks do u think i may lose???

 

[april100]

I have a question about the box plot... there were only 2 outliers right? Does anyone remember what the maximum and minimum values were? Were they just the numbers just above/below the outliers?
Also, for the "find the mean and standard deviation" question.... you had to alter the boundaries right??

RW=88.5(outlier 90), LW=i don't remember(bt i think 14 was an outlier). And yes, the boundaries were supposed to be changed by 0.5.

 

[T19]

Yeah i did the same

is it necessary to put zero where there is no data in Venn diagram

 

[T19]

The mean, median, quartiles and the interquartile range will ALL decrease by 5 minutes
The standard deviation will stay the same.
I'm pretty sure of my answer.

IQR will stay the same because both Q1 AND Q3 decreased by 5