Normal Maths Stats

Question 1

Rules for binomial expansion

Answer 1

It is
- two outcomes success or failure
- probability of each outcome is fixed
- there are n independent trials

Question 2

Expectation
Most likely outcome?

Answer 2

Is N x P

2) test all of them, remember binomial has only one leak outcome so once it declined it’s iver

Question 3

What does rhe significance level suggest

Answer 3

The probability of REJECTING H0 when it is actually correct.

Increasing singing acne level means yiu are more likely going to reject H0 when yiu shouldn’t

Question 4

What should they do normally if they think data correct now

Answer 4

Test with further samples

Question 5

When can’t there be a critical region

Answer 5

When even the orovitly of it being 0 is greater than significance, as this means there’s no chance of rejecting the thing ever

Question 6

How ti do 2 tail tests for critical and p value

When do you use two tail agsin

Answer 6

Critical, you are testing for both tails, so highest in lower wnd lowest in higher
DIVIDE SIGNIFICANCE LEVEL BY 2, again both lower than significance because any value in this range would lead to rejection

For p value, times the o value found by 2, as yiu are testing in opposite extreme too, and they’re symmetrical
Remember two tail is when there is any change not necessarily a specific one

Question 7

AGAIN WHAT TI DI FIR CRITICAL AND HYPOTHESIS DONT LACK

Answer 7

Critical divide signgincisne by 2

Hypothesis multiply p value by 2! Keep critical the same