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1. current mean: 21

"George's dad claims that he is spending too much time on the internet. He tells George to reduce his usage so that the mean daily time for May is 20% less than the current mean

What is the maximum total time George can spend surfing the internet for the remaining 10 days of May?"

This is the third part of a question and I have no idea how to do it!! If you need any other info from the rest of question/ the original question - I'll give it

2. (Original post by batoot)
current mean: 21

"George's dad claims that he is spending too much time on the internet. He tells George to reduce his usage so that the mean daily time for May is 20% less than the current mean

What is the maximum total time George can spend surfing the internet for the remaining 10 days of May?"

This is the third part of a question and I have no idea how to do it!! If you need any other info from the rest of question/ the original question - I'll give it

How many days does the mean of 21 apply to? So how many hours were spent in total during that period?

What's 21 take away 20%?

Post the answers to these questions if you're still stuck.
3. (Original post by notnek)
How many days does the mean of 21 apply to? So how many hours were spent in total during that period?

What's 21 take away 20%?

Post the answers to these questions if you're still stuck.
mean of 21 minutes applies to "the time he spends per day surfing the internet for the first three weeks of May. The times given to the nearest minute are as follows:
0 0 0 5 10 12 13 15 16 16 17 18 21 24 26 26 32 35 61 73 "

i literally did 21 - 42 = 16.8 minutes before posting the question but I didn't think that was the answer cause it seems too simple?
4. (Original post by batoot)
mean of 21 minutes applies to "the time he spends per day surfing the internet for the first three weeks of May. The times given to the nearest minute are as follows:
0 0 0 5 10 12 13 15 16 16 17 18 21 24 26 26 32 35 61 73 "

i literally did 21 - 42 = 16.8 minutes before posting the question but I didn't think that was the answer cause it seems too simple?
Can you post the full question?

You've only posted 20 numbers so can you check that.

You can do this question without the extra info. but it's best that you give all the information.
5. (Original post by notnek)
Can you post the full question?

You've only posted 20 numbers so can you check that.

You can do this question without the extra info. but it's best that you give all the information.
um the question only gives 20 numbers yh idk what that's about lol

"George records the time he spends per day surfing the internet for the first three weeks of May. The times, given to the nearest minute area as follows:
0 26 13 5 18 12 35 24 61 16 10 26 15 0 0 73 21 17 16 42 32

i) find the mode, median, and mean, commenting on their relative usefulness as measure of central tendency for this data set (5 mks)

ii) Calculate the standard deviation (3 mks)

iii) George's dad claims that he is spending too much time on the internet. He tells George to reduce his usage so that the mean daily time for May is 20% less than the current mean.
What is the maximum total time George can spend surfing the internet for the remaining 10 days of May? (3 mks) "
6. (Original post by batoot)
um the question only gives 20 numbers yh idk what that's about lol

"George records the time he spends per day surfing the internet for the first three weeks of May. The times, given to the nearest minute area as follows:
0 26 13 5 18 12 35 24 61 16 10 26 15 0 0 73 21 17 16 42 32

i) find the mode, median, and mean, commenting on their relative usefulness as measure of central tendency for this data set (5 mks)

ii) Calculate the standard deviation (3 mks)

iii) George's dad claims that he is spending too much time on the internet. He tells George to reduce his usage so that the mean daily time for May is 20% less than the current mean.
What is the maximum total time George can spend surfing the internet for the remaining 10 days of May? (3 mks) "

Firstly, your mean is wrong. Start by correcting that.

Then take 20% off this mean. This will give you the preferred mean over the full 31 days.

Then e.g. if the mean over 31 days was 15 then the total over these 31 days is 31 x 15.

You can use this to find the total over the last ten days.

Again, post all your working/ideas if you get stuck.
7. (Original post by notnek)

Firstly, your mean is wrong. Start by correcting that.

Then take 20% off this mean. This will give you the preferred mean over the full 31 days.

Then e.g. if the mean over 31 days was 15 then the total over these 31 days is 31 x 15.

You can use this to find the total over the last ten days.

Again, post all your working/ideas if you get stuck.
fml I have to redo all the other parts

thank you sm (:

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