If you fail to reject the null hypothesis at the 5% level, then the probability that you are wrong is always 5%. The level of significance is the probability of rejecting the null hypothesis when the null hypothesis is true.

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Author:Amos Gilat
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Chapter1: Starting With Matlab
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8) Some claim that magnets can be used to reduce pain. Design a double-blind experiment to
test this claim. Write a brief proposal that includes important details including the number
of subjects, how subjects are assigned to groups, and how you will make the study double
blind.
ted s bnil uoy ealait qge ydsb won a1enferiw wol
OE eeisM 0E) a nuiov On ever
EM vbure s nie02 od of daiw Jud qirdenctsian s ni Jon yiremua
soma om c bnil sno giar qos gniteb wsn ed) asodnoltasup ort ovens
tt sogguedto tosatingia
9) True/False
a)
b)
c)
and then take a random sample from each group.
d)
e)
know which individuals receive the treatment and which do not.
A census gets information from every member of the population.
A sample gets information from a proper subset of the population.
A stratified sample is where you partition the population into two or more groups
An experiment is any study that seeks to answer a research question.
In a double blind study neither the researcher, nor the experimental subjects
f)
The coefficient of determination gives the proportion of the change in the
response variable the can be attributed to the change in the explanatory variable and
the regression s line.
A wider confidence interval gives a greater level of confidence than a
g)
narrower one (when working with the same data).
bo h)
If the sample mean of a data set is 3.2 then the population mean must also
be 3.2
ton zi
As the sample size (n) increases, the standard deviation of x from that
sample decreases, this assumes the standard deviation is positive.. oe
- onobivo
i)
j)
In the p-value approach, if p-value>a (the level of significance) we reject
the null hypothesis.
k)
If you fail to reject the null hypothesis at the 5% level, then the probability
that you are wrong is always 5%.
The level of significance is the probability of rejecting the null hypothesis
1)
when the null hypothesis is true.
m)
Transcribed Image Text:8) Some claim that magnets can be used to reduce pain. Design a double-blind experiment to test this claim. Write a brief proposal that includes important details including the number of subjects, how subjects are assigned to groups, and how you will make the study double blind. ted s bnil uoy ealait qge ydsb won a1enferiw wol OE eeisM 0E) a nuiov On ever EM vbure s nie02 od of daiw Jud qirdenctsian s ni Jon yiremua soma om c bnil sno giar qos gniteb wsn ed) asodnoltasup ort ovens tt sogguedto tosatingia 9) True/False a) b) c) and then take a random sample from each group. d) e) know which individuals receive the treatment and which do not. A census gets information from every member of the population. A sample gets information from a proper subset of the population. A stratified sample is where you partition the population into two or more groups An experiment is any study that seeks to answer a research question. In a double blind study neither the researcher, nor the experimental subjects f) The coefficient of determination gives the proportion of the change in the response variable the can be attributed to the change in the explanatory variable and the regression s line. A wider confidence interval gives a greater level of confidence than a g) narrower one (when working with the same data). bo h) If the sample mean of a data set is 3.2 then the population mean must also be 3.2 ton zi As the sample size (n) increases, the standard deviation of x from that sample decreases, this assumes the standard deviation is positive.. oe - onobivo i) j) In the p-value approach, if p-value>a (the level of significance) we reject the null hypothesis. k) If you fail to reject the null hypothesis at the 5% level, then the probability that you are wrong is always 5%. The level of significance is the probability of rejecting the null hypothesis 1) when the null hypothesis is true. m)
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