One-Population Test
One Population Test
Two-Pop
Z vs. T dist'n
Potpourri 1
100
What is the Ha?
The alternative hypothesis. It is what you (analyst, researcher) are trying to get to.
100
what is the z-critical value for one-tail, right-tail rejection region of 2.5%?
1.96
100
______________ populations test for a "difference of means", while ______________ populations test for a "mean of differences"
Independent, Dependent
100
This distribution is used when sigma is known.
z
100
Using Interbrand's Best Global Brand ranking, what is the 4th highest ranking automotive sector brand in Europe?
Volkswagen
200
In a legal setting, what is equivalent for a hypothesis test when a jury declares the defendant "not guilty"?
this is the non-rejection of the null. This is not acceptance of the null.
200
Kellogg's wants to test for the product quality of its Eggo waffles. The Eggo 24-count package is advertised to weigh 29.6 ounces. A sample mean and population standard deviation from 35 observations was found to be 30.1 and 6.7 ounces, respectively. What distribution would you assume for hypothesis testing?
z
200
What is a big driver of whether or not to accept that there is a difference of means for independent populations?
Dispersion of the distributions.
200
This distribution is used with sigma is unknown
t
200
Will this trucker let in the driver on the right?
300
If our sample mean is 2.20 hours why would even need to do a hypothesis test to show the the average driving time between Tucson and Phoenix is greater than 2 hours?
Because it is a sample mean, not the entire population.
300
Geographic region of the U.S. that heavily uses the word "Pop" to describe a sweetened carbonated beverage, instead of the word "soda"
Midwest
300
Independent or Dependent Populations? The pricing of Tory Burch sandals is tested against the pricing of Curry Flow 10 shoes
Independent. Different brand, different type of footwear... very little in common.
300
This distribution is used when you only have the SAMPLE standard deviation.
t
300
I’m the rare case when today comes before yesterday. What am I?
a dictionary
400
Why can't we directly compare a z-test statistic to the probability in the tail of rejection region?
z-test statistic is not a probability. It is a standardized unit.
400
What is the p-value for z-test statistic of 1.92
0.0274
400
This parametric equation would build whom?
Tupac.
400
This distribution is used when you have the population standard deviation (sigma)
z
400
Many speculate this person chose his company's logo as blue because he is colorblind
Mark Zuckerberg (Facebook/Meta)
500
What is the significance level, i.e. type-one error?
Allowed probability for a false positive. How much error are you going to allow for in your hypothesis test.
500
How does the Sharpshooter Fallacy relate to hypothesis testing
A hypothesis test is analogous to drawing the target/rings/bullseye BEFORE shooting at the target.
Reduces the chance of concluding a finding (from the data) that is just due to random chance.
500
If you do a hypothesis test with a t-distribution and find that your range of p-values is less than the probability in the rejection region, what can you conclude?
You can reject the Ho, and accept the Ha
500
What is the range of p-values for the below:
t-test statistic = 1.60
n = 14
note: df=n-1
0.05 < p-value < 0.10
500
David’s parents have three sons: Snap, Crackle, and what’s the name of the third son?
David