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OCR MEI Statistics 1 (S1)

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Reply 100

alex7892

so it was 840/3003? people are scaring me with these figures. anyone can confirm this?

Reply 101

Refnom95

For the combinations did people get

5C3 * 9C3 = 840
Then 840 / 14C6 = 0.280?

Reply 102

louci

Original post by alex7892

so it was 840/3003? people are scaring me with these figures. anyone can confirm this?

yep !! i got the same as !!!!!!!

Reply 103

nicknickmac

Original post by louci

omg i was like ...............!!!!!!!!!!!!!!!!!

omg i though i put 14 and got it wrong omg !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

oh gosh i can breath again !!!!!

so it was 14 yeah?

Im pretty sure 14 was right. My calculations for the second bit (the student who chose them at random) was (5C3 * 9C3)/14C6 = 840/3003 which then cancels. did anyone else get this? x

Reply 104

username537823

Original post by louci

slighltly negative skew

thatwas the frequency distribution! did u have like the smallest area of bar at the end of your histogram.. between 300 and 500?

Reply 105

louci

did anyone figure out the last question !!!!!the last part

its urm .....

the one where the 5 coins are thrown 3 times
what is the probability that a total of 3 heads ....

Reply 106

dayofs

Original post by George_

Yeah I did that! :biggrin:

And for the mean and SD question I got 1890.625 = mean, 890 something = sd.

exactly!

Reply 107

louci

Original post by sreddy17

thatwas the frequency distribution! did u have like the smallest area of bar at the end of your histogram.. between 300 and 500?

yep as far as i can remember !!!!

Reply 108

Refnom95

And for the browser thing

0.92 * 0.92 * 0.08 = 0.0677 for third person selected

(0.92 * 0.92 * 0.08) + (0.92 * 0.08) = 0.141 for second or third person selected

1 - (0.92^20) = 0.811 that there was at least one in the sample?

Reply 109

thegreenchildren

Original post by sreddy17

how did peoples histogram look?

I don't remember a histogram! wasnt there a cumulative frequency graph and a random variable one line chart?

Reply 110

louci

Original post by sreddy17

thatwas the frequency distribution! did u have like the smallest area of bar at the end of your histogram.. between 300 and 500?

YEP!!!

Reply 111

Killki06

Hey guys, how did everyone find this paper???
I thought it was impossible! Like, I think i have only gotten 61.1%. Literally! Any ideas on grade boundaries!?!??!

Also, I didnt label my axis for the histogram.
And yeah, it was 9+ 5 = 14 100% sure :biggrin:

How did everyone do the 8% thingy?
and what about hypothesis testing? Rejected H0? ... i did.
Also, the last question OMAG. Yasmin is a bish with her stupid biased coins.

Reply 112

username537823

Original post by thegreenchildren

I don't remember a histogram! wasnt there a cumulative frequency graph and a random variable one line chart?

erm no vertical line chart one... but u had to draw a histogram.. sorry

Reply 113

nicknickmac

Original post by thegreenchildren

I don't remember a histogram! wasnt there a cumulative frequency graph and a random variable one line chart?

It was definitely a historgram :console:

Reply 114

louci

Original post by thegreenchildren

i don't remember a histogram! Wasnt there a cumulative frequency graph and a random variable one line chart?

i swear that was an histogram !!!!!!

I swear there was !!!!1!

Oh noooooooo

Reply 115

Killki06

Original post by thegreenchildren

I don't remember a histogram! wasnt there a cumulative frequency graph and a random variable one line chart?

Oh lord. Were you doing OCR *MEI* ???

Reply 116

Refnom95

Original post by thegreenchildren

I don't remember a histogram! wasnt there a cumulative frequency graph and a random variable one line chart?

It asked us to draw a histogram for the data about the 80 cars. Highest frequency density was 0.052 and lowest was 0.0035... My vertical axis was from 0 to 0.06

Reply 117

dayofs

Original post by MattSimcock

I forgot to minus it from 1. stupid mistake! T^T

Reply 118

Killki06

Original post by MattSimcock

It asked us to draw a histogram for the data about the 80 cars. Highest frequency density was 0.052 and lowest was 0.0035... My vertical axis was from 0 to 0.06

ME TOO!!!! WOOOOOOOO. 5/72. not bad :biggrin:

Reply 119

louci

Original post by killki06

hey guys, how did everyone find this paper???
I thought it was impossible! Like, i think i have only gotten 61.1%. Literally! Any ideas on grade boundaries!?!??!

Also, i didnt label my axis for the histogram.
And yeah, it was 9+ 5 = 14 100% sure :d

how did everyone do the 8% thingy?
And what about hypothesis testing? Rejected h0? ... I did.
Also, the last question omag. Yasmin is a bish with her stupid biased coins.

hey !!!!!
I totally agreee with everything u said !!!
Rejected h0
got that bionomial thing

an the 8%
was a total guess
for the i) i did 0.92*0.92*0.08
then the last paprt i think i did 1-(0.92^20)

the last blood coin question was hell wat did u do ????