one sample hypothesis test
What is the null hypothesis typically stating in a one sample test?
The population parameter = the hypothesized value
What is a purpose of a two sample hypothesis test?
The purpose is to see if the means of two independent groups to determine if there is anything significant difference between them.
What does p-value stand for?
:probability value
What river runs through Watertown and is popular for walking and biking along?
The Charles River
What is the test statistics formula for a one sample Z-test for the mean?
The test statistic is found by subtracting the hypothesized population mean from the sample mean, then dividing that result by the standard deviation of the population divided by the square root of the sample size.
What is a test used for?
data= comparing the means of two groups group A and group B.
what is the range of a correlation coefficient?
from -1 to +1
What nearby city do many Watertown students visit for college tours and concerts?
Boston
A company claims their battery lasts 10 hours you test 30 batteries and find a mean of 9.6 hours what’s the alternative hypothesis
The true mean is less than 10 hours
What is the null hypothesis in a two sample t-test?
Solution= That there is no difference between the means of the 2 populations.
What does a confidence interval represent?
A range of values likely to contain the population parameter.
What public place in Watertown was renovated and reopened in 2022 with a new cafe and teen space?
Watertown Free Public Library
What condition must be met to use a one sample t-test instead of a z-test?
The population standard deviation is unknown and the sample is from a normal distribution or n>30
When you should you use a paired t-test instead of an independent sample t-test?
When the data from the two samples are dependent.
what does the mean tell you about a data set?
It tells you the average value of the numbers.
What high school sport did Watertown win 18 state championships in a row for?
Field Hockey
A researcher gets a p-value of 0.03 and set type 1 error at 0.05 what is the conclusion?
Reject HO
Describe a scenario where you would use a two sample z test instead of a two sample t test.
Solution= When you know the population standard deviation for both groups.
If you flip a a coin what is the probability it lands on heads?
50% 0.5
What is the name of the performing arts center in Watertown that hosts plays, comedy shows, and student events?
The Mosesian Center for the Arts