Confidence Intervals for Means
The test name for conducting a Confidence Interval for Means when given one sample and no population SD
What is a one sample t interval for a population mean
The test name for conducting a Significance Test for a population mean when the population standard deviation is unknown.
What is a one sample t test for a mean
What is the test name for conducting a Matched Pair Procedures to find significant evidence the alternative is true.
What is a one-sample t-test for sample mean difference
What is the test name for conducting a Confidence Interval to estimates the difference between the means of two independent populations when the population standard deviation is unknown
What is a Two Sample Means T Interval
What is the test name for conducting a Significance Test for a Difference in Means
What is a Two Sample T test for a Difference in Means
The calculator function to calculate t*
What is invT
The null and alternative hypotheses for a Significance Test for difference in independent sample means, if we're trying to claim there is a difference from the null
What is
Ho: mu1=mu2
Ha: mu1 is not equal to mu2
What do we write in our Assumptions Section
What is
1) Random and (independent for 2 sample observational study)
2)Independence - At least _____ in the population.
3)Normality - n>30, population is normal, or graphs are symmetric/linear
The calculator function to find df for two independent samples
What 2-SampTInt in the test section of the calculator
The calculator function to conduct a Two Sample T Test for a Difference in Means
What is 2-SampTTest in the test section in the calculator
t* has a 90% Confidence Interval with n=5
What is t*=2.132
We have a p-value of 0.023 and our significance level is 0.05, make a claim
What is since our p-value of 0.023 is lower than a=0.05, we can reject the null hypothesis
ME=1
95% Confidence Level=1.96
SD=5
What is the minimum sample size?
What is n=96.04=97
The sentence stem for Confidence Intervals
What is
We are ___% confident that the true population mean of ___ (context) is between ___ and ___.
We have a p-value of 0.064 and our significance level is 0.05, make a claim
What is since our p-value of 0.064 is greater than a=0.05, we fail to reject our null hypothesis.
The closer the t-distribution moves towards the standard normal distribution
What is increasing our sample size (and larger dfs we get), which decreases varaibilty
Our sample size is less than 30 in the Normal Condition for a t test, what should we do
What is we have to have either state the original population is normally distributed (given) or graph the sample data to check for outliers or strong skewness
This is when data is paired together
What is
One Sample t Test for a Mean Difference
Paired t Test
What is the generalized formula for Confidence Intervals
point estimate +/- critical value (SE)
Both populations are under the sample size of 30, what should we do?
What is both populations have to be normally distributed, or one or both graphs for both populations have to have no outliers or no strong skewness
Calculating a standardized value that measures how far the sample result is from what is expected based on the null hypothesis. We don't know the population standard deviation, so we use the standard deviation from our sample
What is a t-statistic
The formula for the appropriate test would be used
In an experiment, we do not have to check this condition
What is Independence between groups (1st condition). We always check independence within groups (2nd condition)
The margin of error to determine a confidence interval for a population mean when given the population standard deviation
What is ME=z* (standard deviation/square root of n)
This is n-1
What is the Degrees of Freedom
The null and alternative hypotheses for a Matched Paired T Test to see if the first mean is lower than our second mean
What is
ud=u1-u2
Ho:ud=0
Ha:ud<0