Flashcards
S2 knowledge
Cards in this deck (16)
- 1Hypothesis testing Give the null hypothesis in terms of μ and kμ = k
- 2Give the 3 different new hypothesesIf changed: μ≠k
If increased: μ>k
If decreased: μ - 3Null hypothesis is rejected if z...Does not lie in the critical region
- 4What is a type I errorWhen a true null hypothesis is incorrectly rejected
- 5A type II error is the acception of a false null hypothesis, True or False.True
- 6Poisson distribution Give the general notation of a poisson distributionP~(λ)
- 7What does λ representmean
- 8State the conditions for poisson distibution to be an appropriate modelData is random
Mean is approximately equal to the varience - 9Student's-t distribution State the condition on the sample size(n) for a t distribution to be requiredn<30
- 10What is the degrees of freedom(v) in t distributionv=n-1
- 11List the steps to get a t-dist confidence inteval1. Work out mean
2. Work out standard deviation if not given
3. Work out standard error
4. Find value of t_v
5. Work out and state upper and lower bounds confidence inteval - 12Chi squared distribution State the formular of the test statistic
- 13What is the condition for this test stat formulardegrees of freedom = 1
- 14State the value of the degrees of freedom(numbor of rows-1)*(number of columns-1)
- 15Give steps of the chi distibution hypothesis test1. State H0 & H1
2. State degrees of freedom
3. Write critical value from table in formular book
4. Write expected table
5. Write test statistic
6. Give appropriate inequality
7. Reject/Acept H0 accordingly - 16Continuous distribution If X = aY+b, find E(X) & Var(Y)E(X) = aE(X)+b
Var(X) = a^2 Var(X)
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- Everything you should know about statistics 2
- Created by
- Joseph Stevens
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