1
categorical: categories
quantitative: numbers
Which animated movie features talking toys that come to life?
toy story
gryffindor, slytherin, ravenclaw, hufflepuff
z-score formula
z = (x - μ) / σ
an internet research company surveyed 85 online shoppers.
beauty supplies 13
office supplies 26
toys 15
electronics 31
three shoppers were selected at random, one at a time without replacement. What is the probability that the first two shoppers purchased office supplies and the third purchased toys?
0.016
What pop star headlined the 2023 Super Bowl halftime show?
Rihanna
define type I and type II errors in hypothesis
Type I Error (False Positive): Occurs when a true null hypothesis (H0) is incorrectly rejected.
Type II Error (False Negative): Occurs when a false null hypothesis is not rejected
find the frequency of the zodiac signs of the people in your group
TBD
define ordinal and nominal
ordinal can be ranked
nominal there is no rank
What was the first Marvel movie in the MCU?
Iron Man
A random sample of 15 health maintenance organizations (HMOs) was selected. For each HMO, the co-payment (in dollars) for a doctor's office visit was recorded. The results are as follows: 5, 9, 8, 12, 11, 7, 6, 7, 10, 11, 10, 6, 11, 5, 8 Under the assumption that co-payment amounts are normally distributed, find a 99% confidence interval for the mean co-payment amount in dollars. Then find the lower limit and upper limit of the 99% confidence interval. Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place.
lower limit: 6.6
upper limit: 10.2
What pop group includes Harry Styles?
One direction
test scores
6|458
7|1455677778
8|1344478
9|1368
identify:
- lowest overall
-highest score in the 80s
-how many people scored 70s
-64
-88
-10
Suppose that the time required to complete a 1040R tax form is normally distributed with a mean
of 100 minutes and a standard deviation of 20 minutes. What proportion of 1040R tax forms will
be completed in at least 76 minutes? Round your answer to 4 decimal places
0.8849
what country does lily hate in modern family?
vietnam
what movie is the quote "that's to fetch" from?
define interval and ratio
interval values: Arbitrary (no true zero) ranked, equal intervals, addition/subtraction possible.
ratio: True zero (absolute zero).
name all kardashian/jenner sisters
kourtney kardashian
kim kardashian
khloe kardashian
kendall jenner
kylie jenner
what will your null hypothesis be all the time?
null μ = 0
how do you differentiate between using a t or a z test when analyzing hypothesis?
z test: your n is large and your standard deviation is known
t test: n is small and std is unknown
11, 12, 12, 14, 15, 15, 16, 18, 19, 19, 20, 21, 21, 21, 22, 23, 25
-find the mean, median and mode
-17.88
-19
-21
get the standard deviation of the ages of the people in your group
TBD
On their website, a property management company states that the mean monthly rent for apartments on the east side of town is $750. A researcher for a consumer advocacy group believes that, due to the construction of newer apartment complexes in neighboring towns, the mean monthly rent on the east side, μ, is now lower. A random sample of 13 monthly rents for apartments on the east side has a mean of $739, with a standard deviation of $19. Assume that current monthly rents for apartments on the east side are approximately normally distributed. Based on the sample, is there enough evidence to conclude, at the 0.10 level of significance, that the population mean monthly rent is now less than what is stated on the website? Perform a one-tailed test. Then answer the questions below. Carry your intermediate computations to three or more decimal places.
State the null hypothesis H and the alternative hypothesis that we would use for this test.
null: μ = 0
h1: μ < 750
-t test
name all members from BTS
RM
Suga
J-Hope
Jin
JK
Jimin
V
what were your leader's office hours?
depends on guadalupe/dina