Name: Score:
21 Multiple choice questions
Term 1 of 21
why can't you say there is no chance of something far from the mean in the normal distribution
bell shaped curve
1. use standard normal to find x value (z) for the given area
2. use formula, sub in known x value
3. form 2 simultaneous equations and subtract them to find mean and s.d.
constant of proportionality
tails are infinite
Term 2 of 21
what is a in y=ab^t
constant of proportionality
proportional relationship
rate of change
wave equation
,Term 3 of 21
an interpretation of a correlation (eg wind speed and temperature)
- daily mean wind speed (Beaufort conversion) - qualitative
- daily rainfall - not symmetric as many days have 0 rainfall
- if there is an (almost) linear relationship
- eg. if logq = 0.988logt + c
(shows that q= kt^n)
mean = np
standard deviation = ROOT np(1-p)
eg. as temperature falls, wind speed rises in october 2012
use gradient if given - as temperature falls by 1 degree, wind speed rises by 10kN
Term 4 of 21
What is a hypothesis test?
strong/weak positive/negative correlation
- eg. if r = 0.988, r close to 1, therefore strong positive correlation (linear relationship)
1. state hypotheses
2. find sample size and r (sample mean)
3. find critical value and compare to r (when r is positive, critical region is > critical value)
4. reject H0 or 'insufficient evidence to reject H0'
5. if rejecting: there is evidence that the product moment correlation coefficient.....
A statistic that is calculated from sample data in order to test a hypothesis about a
population
a statistical test used to determine whether there is enough evidence in a sample of data to
infer that a certain condition is true for the entire population.
, Term 5 of 21
Months included in large data set
constant of proportionality
may to october
december to may
november to april
Term 6 of 21
conditions for normal distribution to model eg pressure
classic epidemic curve
inverted epidemic curve
bell shaped curve
normal curve
Definition 7 of 21
- find normal dist. of mean using formula (s.d. = sd/root n
- H0: mu = ?, H1: mu </> ?
- use normal CD (using mean as that in H1) to find probability that mean =< recorded mean
- if less than 0.05, reject H0
normal distribution for mean of x
PMCC hypothesis testing
hypothesis testing normal distribution mean
What is a hypothesis test?
21 Multiple choice questions
Term 1 of 21
why can't you say there is no chance of something far from the mean in the normal distribution
bell shaped curve
1. use standard normal to find x value (z) for the given area
2. use formula, sub in known x value
3. form 2 simultaneous equations and subtract them to find mean and s.d.
constant of proportionality
tails are infinite
Term 2 of 21
what is a in y=ab^t
constant of proportionality
proportional relationship
rate of change
wave equation
,Term 3 of 21
an interpretation of a correlation (eg wind speed and temperature)
- daily mean wind speed (Beaufort conversion) - qualitative
- daily rainfall - not symmetric as many days have 0 rainfall
- if there is an (almost) linear relationship
- eg. if logq = 0.988logt + c
(shows that q= kt^n)
mean = np
standard deviation = ROOT np(1-p)
eg. as temperature falls, wind speed rises in october 2012
use gradient if given - as temperature falls by 1 degree, wind speed rises by 10kN
Term 4 of 21
What is a hypothesis test?
strong/weak positive/negative correlation
- eg. if r = 0.988, r close to 1, therefore strong positive correlation (linear relationship)
1. state hypotheses
2. find sample size and r (sample mean)
3. find critical value and compare to r (when r is positive, critical region is > critical value)
4. reject H0 or 'insufficient evidence to reject H0'
5. if rejecting: there is evidence that the product moment correlation coefficient.....
A statistic that is calculated from sample data in order to test a hypothesis about a
population
a statistical test used to determine whether there is enough evidence in a sample of data to
infer that a certain condition is true for the entire population.
, Term 5 of 21
Months included in large data set
constant of proportionality
may to october
december to may
november to april
Term 6 of 21
conditions for normal distribution to model eg pressure
classic epidemic curve
inverted epidemic curve
bell shaped curve
normal curve
Definition 7 of 21
- find normal dist. of mean using formula (s.d. = sd/root n
- H0: mu = ?, H1: mu </> ?
- use normal CD (using mean as that in H1) to find probability that mean =< recorded mean
- if less than 0.05, reject H0
normal distribution for mean of x
PMCC hypothesis testing
hypothesis testing normal distribution mean
What is a hypothesis test?
