This gives an interval of plausible values for a parameter. The interval is calculated from the data and has the form
point estimate ± margin of error
What is Confidence Interval
100
When sampling without replacement, check that n≤1/10N
What is the 10% Condition
100
What test would we use for the following set of hypotheses
Ho:p = .57
Ha:p < .57
What is One-sample z test
100
Because our ______, .02476, is greater than α=.05, we fail to reject Ho.
What is P-value
100
Occurs if we fail to reject Ho when Ha is true
What is Type II error
200
Says that a parameter differs from the null hypothesis in either direction
What is a two-sided alternative Ha
200
Both np̂ and n(1- p̂) are at least 10
What is the Large Counts Condition
200
Regarding the difference of u1 - u2
What test do we use if independent random samples are taken from each of the two populations?
What is Two-sample t test
200
STATE:
Our __________ of interest are p1=....... and p2.......
What are Parameters
200
This happens to a confidence interval when we
- increase the sample size
- decrease standard deviation
What is Reduced width of the confidence interval
300
The probability, computed supposing Ho to be true, that the statistic will take a value at least as extreme as the observed result in the specified direction by Ha
What is P-value
300
Check if the population has a normal distribution, if this information is unknown, graph the data and check for any skewness or outliers
What is the Normal Condition
300
What test do we use for the following hypotheses
Ho:p1 - p2 = 0
Ha:p1 - p2 ≠ 0
What is Two-sample z test
300
We are 80% ________ that the _________ from .01987 to .05382 captures the true mean.....
What is confident, interval
300
If the data is statistically significant at level α,
we ________________ Ho
What is Reject
400
The probability that the test will reject Ho when the alternative is true
What is Power
400
The data comes from a well designed random sample or a randomized experiment
What is the Random condition
400
What test do we use for the following hypotheses
Ho:u=.01
Ha:u>.01
What is One-sample t test
400
Because the P-value, .0644, is greater than α=.05,
we _____________ Ho.
What is fail to reject
400
The value of the significance level is the probability of having a ___________ error
What is Type I
500
When the standard deviation of a statistic is estimated from data, the result is called the
What is Standard Error
500
Check that n≥30
What is the Large Sample condition
500
Regarding the difference of u1 - u2
What test do we use if one random sample is taken, and two data values are recorded for each individual
What is Paired t procedures
500
Because the P-value, .1816, is greater than α=.05, we fail to reject Ho. We ________ convincing evidence that the mean DO level in the stream is less than 5mg/l.
What is "don't have"
500
If we were to say
"If we take many samples of the same size from this population, about C% of them will result in an interval that captures the actual parameter value."
What are we interpreting?