Hypotheses Testing
What are the two hypotheses statements we use?
Null (H0) and Alternative (H1)
What are the 3 main central tendencies
Mean, median, mode
In probability what does "and" and "or" stand for
and: means that the outcomes has to satisfy both conditions at the same time
or: means that the outcome has yo satisfy one condition, or the other, or both at the same time
Find the area between z=0 and z=1.07
.357
What is qualitative and what is quantitative data?
Qualitative data is interpretation-based/descriptive
(it's categorical data, stuff you can rank or put in groups)
Quantitative data is numbers-based, countable, or measurable
(its things that have decimals)
True or False: There isn't enough evidence when we fail to reject
True
What is the midrange?
Max-min/2
True or False: to be independent
P( A and B) ≠ P(A) * P(B)
Flase
to be independent
P( A and B) = P(A) * P(B)
Find the area to the right if z=2.01
.22
What is the most popular major at UTRGV?
Biology
We reject the P value ______ than the alpha
Less than or equal too
Find the mean of the sample
4,6,8,9,10,12
8.1
Find the probability of getting a 10 or a jack in a deck of cards
2/13
Best point of estimate of a population mean is similar to what central tendency?
the mean
What did Amzaon originally sell before turning into the #1 shopping app?
Books
Using the T table, find the critical value of a left tail when the alpha=.05 and a df=19
-1.729
Find the mean, median, and mode of the sample
3, 4, 6, 7, 12, 13, 15, 16, 18
mean=10.4
median= 12
mode= none
exam scores: 90-98, 99-107, 108-116, 117-125, 126+
Applicants: 4, 11, 20, 10, 5
Find the probability that the applicants exam scores is 116 or less
(20+11+4)/50=7/10
How do you find the confidence interval?
Using the sample mean, sample size, standard deviation, and Confidence level to find the upper and lower limit
What does the average American do 22 times a day?
open the fridge
Find the Test value of the 20 students and determine if you reject or fail to reject when your critical value is -1.729
sample mean= 2.27
mean= 2.98
sd=.98
Test Statistic=-3.24
we would fail to reject
Find the mean, median, and mode of the sample
5475, 6617, 3124, 7560, 494, 3264, 279, 6799, 598, 3824
mean= 3,803.4
median=3,544
mode=None
exam scores: 90-98, 99-107, 108-116, 117-125, 126+
Applicants: 4, 11, 20, 10, 5
Find the probability that the applicants exam scores is no more than 107
(10+5)/50=3/10
The average student falls asleep 12 times in class. If the standard deviation is 3.2 find the probability that the mean of the sample of 36 is less than 11.
-1.875
What is your PLTL leader majoring in?
Clinical Psychology