# 2017 mei s3

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So how did you all find it? Found it pretty straightforward how did you all do the last question?

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#2

I got 3.18... some people got 3.5-3.18 =0.32. Not sure whether it was the discount or the discounted price.

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(Original post by

I got 3.18... some people got 3.5-3.18 =0.32. Not sure whether it was the discount or the discounted price.

**Casio123**)I got 3.18... some people got 3.5-3.18 =0.32. Not sure whether it was the discount or the discounted price.

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#4

So the values in my calculator are as follows:

Test statistic for the t-test? 1.539

Confidence interval (29.7115,...)

Test statistic for the Wilcoxon paired test: W=15, v=8-1=7

Test statistic for the goodness of fit: 12.6

P(mean of x>4)=0.00921

0.3165

0.2621

0.3629

Mean for D 4.68w

S.d. For D 0.2219w

Test statistic for the t-test? 1.539

Confidence interval (29.7115,...)

Test statistic for the Wilcoxon paired test: W=15, v=8-1=7

Test statistic for the goodness of fit: 12.6

P(mean of x>4)=0.00921

0.3165

0.2621

0.3629

Mean for D 4.68w

S.d. For D 0.2219w

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Yeah I agree with all of the above except wasn't the last one 0.212w, root(0.067^2x10) . And if I left the confidence interval as a bracket like (x,y) would I get all the marks?

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#6

Nope, found it alright.

Here are my answers (from my calc) except for the worded ones

1. T- test test statistic = 0.75/1.9494/4 =1.5390

Cv= 1.753 so insignificant, reject h1.

Confidence interval 30.75 +- 2.131 x square root of 3.8/16

Wilcoxin test statistic 15 cv 5 so insignificant

2. Chi square sum = 12.6

Cv = 12.02 (v=7 10%)

3. Prob (x>4) = 0.00921

A bunch of proves and CLT

4. Prob (x>0.5) = 0.3165

Prob of mackerel smaller than trout = 0.2621

Prob of one macker plus two trout > 5 pounds = 0.3629

W=3.18

I have the working if you want it as well.

Do any of these numbers look familiar to you?

Here are my answers (from my calc) except for the worded ones

1. T- test test statistic = 0.75/1.9494/4 =1.5390

Cv= 1.753 so insignificant, reject h1.

Confidence interval 30.75 +- 2.131 x square root of 3.8/16

Wilcoxin test statistic 15 cv 5 so insignificant

2. Chi square sum = 12.6

Cv = 12.02 (v=7 10%)

3. Prob (x>4) = 0.00921

A bunch of proves and CLT

4. Prob (x>0.5) = 0.3165

Prob of mackerel smaller than trout = 0.2621

Prob of one macker plus two trout > 5 pounds = 0.3629

W=3.18

I have the working if you want it as well.

Do any of these numbers look familiar to you?

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#8

(Original post by

Yeah I agree with all of the above except wasn't the last one 0.212w, root(0.067^2x10) . And if I left the confidence interval as a bracket like (x,y) would I get all the marks?

**Acey110**)Yeah I agree with all of the above except wasn't the last one 0.212w, root(0.067^2x10) . And if I left the confidence interval as a bracket like (x,y) would I get all the marks?

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#9

(Original post by

Nope, found it alright.

Here are my answers (from my calc) except for the worded ones

1. T- test test statistic = 0.75/1.9494/4 =1.5390

Cv= 1.753 so insignificant, reject h1.

Confidence interval 30.75 +- 2.131 x square root of 3.8/16

Wilcoxin test statistic 15 cv 5 so insignificant

2. Chi square sum = 12.6

Cv = 12.02 (v=7 10%)

3. Prob (x>4) = 0.00921

A bunch of proves and CLT

4. Prob (x>0.5) = 0.3165

Prob of mackerel smaller than trout = 0.2621

Prob of one macker plus two trout > 5 pounds = 0.3629

W=3.18

I have the working if you want it as well.

Do any of these numbers look familiar to you?

**Casio123**)Nope, found it alright.

Here are my answers (from my calc) except for the worded ones

1. T- test test statistic = 0.75/1.9494/4 =1.5390

Cv= 1.753 so insignificant, reject h1.

Confidence interval 30.75 +- 2.131 x square root of 3.8/16

Wilcoxin test statistic 15 cv 5 so insignificant

2. Chi square sum = 12.6

Cv = 12.02 (v=7 10%)

3. Prob (x>4) = 0.00921

A bunch of proves and CLT

4. Prob (x>0.5) = 0.3165

Prob of mackerel smaller than trout = 0.2621

Prob of one macker plus two trout > 5 pounds = 0.3629

W=3.18

I have the working if you want it as well.

Do any of these numbers look familiar to you?

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#11

(Original post by

What did you put for the central limit theorem

**Acey110**)What did you put for the central limit theorem

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(Original post by

It was the 0.00921 one

**Casio123**)It was the 0.00921 one

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#13

(Original post by

How did you get it?

**Acey110**)How did you get it?

Square root that to get 0.2119

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#14

(Original post by

I mean the reason it

**Acey110**)I mean the reason it

Don't know if that's right

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(Original post by

I said n is large enough to assume that the mean of the population is same as the mean of the sample

Don't know if that's right

**Casio123**)I said n is large enough to assume that the mean of the population is same as the mean of the sample

Don't know if that's right

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#16

(Original post by

Yeah makes sense, I wrote so you could approximate it to the normal :/

**Acey110**)Yeah makes sense, I wrote so you could approximate it to the normal :/

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#17

(Original post by

I got the same as you apart from the first critical value in Q1 which I got to be 2.131

**jn998**)I got the same as you apart from the first critical value in Q1 which I got to be 2.131

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#18

so my values are as follows:

test statistic = 1.5894 (may be slightly off) < critical value = 1.753 (not significant)

Interval [29.74,31.76]

W = 15 > Critical value = 5 (not significant)

Chi-squared = 12.6 > 12.02 (significant)

mode = 4

E(X) = 3.6

0.00921

0.3165

0.2621

0.3629

4.68w 0.212w

w = £3.05 (may be wrong)

i think some of my answers will have a small error becauseif the difference between calculator and table values

test statistic = 1.5894 (may be slightly off) < critical value = 1.753 (not significant)

Interval [29.74,31.76]

W = 15 > Critical value = 5 (not significant)

Chi-squared = 12.6 > 12.02 (significant)

mode = 4

E(X) = 3.6

0.00921

0.3165

0.2621

0.3629

4.68w 0.212w

w = £3.05 (may be wrong)

i think some of my answers will have a small error becauseif the difference between calculator and table values

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#19

(Original post by

Wasn't it one tail tho? So you have to take 10% instead of 5... not sure

**Casio123**)Wasn't it one tail tho? So you have to take 10% instead of 5... not sure

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#20

(Original post by

Damn, you're right. I forgot about that. How many out of the 10 do you think I'd lose on that question?

**jn998**)Damn, you're right. I forgot about that. How many out of the 10 do you think I'd lose on that question?

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