Year 12s: what will be the first way you research your future options? >>

Stats Help

Molochop

Could anyone help me with these two questions? I've struggled with this for a week now. Thanks

Reply 1

DylanJ42

Original post by Molochop

Could anyone help me with these two questions? I've struggled with this for a week now. Thanks

For the first one;

Let W = weight of the fruit

then W~N(32, 7^2)

so find P(W>40)

Hint below: (if you need it)

Spoiler

Reply 2

Molochop

Alright thanks, so what do you do with the 1300? nothing?

Reply 3

DylanJ42

Original post by Molochop

Alright thanks, so what do you do with the 1300? nothing?

the 1300 pieces of fruit is kind of like a part 2 to the question, find the probability first then for the second part I think you just multiply percentage by 1300

Reply 4

Molochop

thank you for your help. I've got it now. Could someone help me with this too? Would you use the sum of the frequency of the mean when calculating SD or the sum of the frequency x X divided by the sum of the frequency? Also need help on the second part. What do you do after calculating the probability? Divide by the number of students then multiply by 100? Thanks. I've been so stuck on this as well.