stud
bud
Sign up
Log in
Home
Library
Explore
SAT
More
stats final Flashcards | StudBud
Explore
/
stats final
In Linear, what does the N stand for?
What is standard deviation?
stats final
70 terms
·
StudBud Administration
·
27 plays
Imported from external platform
Flashcards
70 cards
F
Practice quiz
P
Host live
L
Questions
70
Answers
1
What is standard deviation?
oppurtunities from interest rates
math
Describes the typical spread from the mean for a Discrete Random
random samples
2
In Linear, what does the N stand for?
Narrow
Nice
Normal
Nine
3
In Linear, what does the E stand for?
Excited
Equal Rights
Equal
Equal Vibrance
4
In DUFS, what does the F stand for?
x value
Sigma
Linear or Nonlinear
p value
5
What is a statistic?
A number that describes some characteristic of a POPULATION
something of a random sample
A number that describes some characteristic of a single SAMPLE
something so simple
6
In Linear, what does the R stand for?
Right
Round
Random
Rough
7
What are Quantitative Variables
?
The amount of confusion per student in a statistics class.
Take numerical values for which it makes sense to find an average.
Variables that only speak in math puns.
The number of times a math student cries during finals week.
8
What is a Center?
Unbiased Estimator
a circle
the middle
a calculator
9
What is the 10% condition?
large counts
p value
n (greater than or equal to) 10% of the Population
r rated the population
10
For slope, is it t-test?
False
True
11
The goodness of fit test Statistic is calculated using the formula x squared equals observed - expected squared...
False
True
12
What is a significance test?
DECIDE BETWEEN TWO COMPETING CLAIMS
deciding between 4 competing claims
deciding between 3 competing claims
decide between 1 competing claim
13
The null hypothesis is the claim we Why evidence against usually represents no difference…
False
True
14
what is the mean and SD of the distribution of Z-score?
Mean = 1, SD = 0
Mean = the biggest number in the data, SD = how random the data feels
Mean = 100, SD = 15
The mean is 0 and the standard deviation is 1
15
A one sample t test includes dating hypotheses and checking conditions…
True
False
16
What's to be meant to use the formula s divided by the square root of n to estimate the standard error of X bar
r the population is normal or n is greater than or equal to 30
the population mean and must be known in advance
the population must be infinite
its greater than 10 and selected not at random,
17
The alternative hypothesis is always an equality statement…
True
False
18
What is the law of large numbers?
Every group has equal chance of selection
The probability of any outcome of a random phenomenon
An outcome from a chance process is always a number between 0 and 1.
Treatment is applied and results are recorded
19
What is a continuous random variable?
Takes on ALL real number Values within an interval
interval laps
I don't know
multiple variables
20
What is a Categorical Variable?
differnt categories
random places
all of the individual
Places an individual into one of several groups or categories
21
What is the Linear Equation?
y=a+bx
y(hat)=a+bx
y=ax+b
y=abx
22
What is the sign... level used in the test for determining if the mean normal body temp is diff from the doctor's claim?
0.10
0.001
0.01
0.05
23
What is a stratified sample?
No treatment is applied
Treatment is applied and results are recorded
Every group has equal chance of selection
A sample from each subgroup
24
Which of the following is the correct null hypothesis in a chi-square goodness of fit test?
The observed distribution is not equal to the expected distribution
the expected value equals the standard deviation
the sample minute equals the population mean
They claim distribution of a category variable is true
25
What is the formula for a z-score?
Z = (mean - value) × 100
Z = data value ÷ total number of values
Z = mean × standard deviation
z=score-mean/SD
26
What is the probability of flipping heads on a fair coin?
0.5
0.1
0.7
0.3
27
What is the large counts condition?
np ≥ 10
np<10
n(1-p) <10
np>10
28
To calculate the MARGIN OF ERROR…
making good out of the bad
MOE
expect proportions from x value
how many sd we can expect the sample proportion to vary from t
29
Which group with the ____________ that actually captures the true proportion wins a prize!
widest interval
lowest interval
Narrowest Interval
highest inerval
30
What is the formula for calculating the standard deviation of x bar?
n/s
s
s squared/n
S divided by the square root of n
31
In DUFS, what does the c stand for?
t-test
linear
nnlinear
State x’s relationship with y.
32
What is REALITY?
never population
Population parameters are MOST ALWAYS unknown and impossible to calculate
the real world
parameter of horizons
33
What is an observational study?
Every group has equal chance of selection
No treatment is applied
Systematic error in data collection
A sample from each subgroup
34
The GOAL of a Confidence Interval…
LOW confidence and SMALL margin of error
HIGH Confidence and a SMALL Margin of Error
LOW confidence and BIG margin of error
HIGH confidence and BIG margin of error
35
What is a parameter?
from people around you
puppies
parameter of a house
A number that describes some characteristic of a POPULATION
36
What is an experiment?
Treatment is applied and results are recorded
Systematic error in data collection
A sample from each subgroup
Every group has equal chance of selection
37
What is Cumulative Relative Frequency?
It’s how often you check your phone during math class.
It’s the speed at which data moves through a frequency chart.
It’s the total number of frequencies added together without any math.
Graphs show the percentiles for individual data values.
38
What is the probability of rolling a 3 on a fair dye?
1/6
1/5
1/8
1/2
39
In DUFS, what does the U stand for?
uni
unusual
unnecessary
unicorns
40
What is the template for p-value?
we reject the Ho and we do have convincing evidence for the (Ha Context)
we fail to reflect the ho
we reject the ho
we do not have convincing evidence
41
What does a histogram display?
A map of where all the histo-creatures live.
The frequency of data intervals
The speed of light measured in bar graphs.
The official scoreboard of ancient pyramid builders.
42
A sampling distribution of a statistic is a…?
interest groups
sigma
x
values taken by the statistic in all possible samples of the same size
43
In Linear, what does L stand for?
Line
Loser
Linear
Limbo
44
What is a variable?
A type of vegetable only grown in algebra farms.
A unit of measurement for how much you like math.
Is any characteristic or trait of an individual
A mathematical creature that changes shape when you’re not looking.
45
What is the purpose of the chi- squared goodness of fit test
?
To analyze the distribution of one categorical variable for one population
to predict future values of a variable using regression
to test of a sample proportion is equal to a population proportion
To compare two means from different populations
46
A “P-Value” …
measures the strongest hypothesis
Measures the strength of evidence against the Null hypothesis…
no measures
lots of evidence given by null
47
What is bias sampling?
Every group has equal chance of selection
Systematic error in data collection
A sample from each subgroup
Treatment is applied and results are recorded
48
When can we use a t-distribution to create a confidence interval for the sample mean
population is normal/the sample is large/fi the sample shows no strong skew
Only the population mean is known
only when the sample size is exactly 3
only when the population standard deviation is known
49
What is statistical significance?
a result is likely due to chance/to some factor of interest
An outcome from a chance process is always a number between 0 and 1
The probability of any outcome of a random phenomenon
no interest rates
50
What is the correct formula for calculating expected counts by hand in a chi-square test?
Equals Row total plus column total divided by table total
rolled total times column total divided by 2
Expected count equals row total times column total divided by table total
row total minus column
51
In DUFS, what does the s stand for?
settle
strong
strength
strive
52
The Cherry Square goodness of it requires you to define a parameter and calculated mean…
False
True
53
What is an outlier?
A value much higher or lower than the other
the other is low
its the value
super low
54
What is the PE for the true mean weight of an oreo if theres 30 oreos, mean weight is 11.19gram
34
0.08
11.33
11.19 grams
55
What is probability?
a decimal
a fraction
An outcome from a chance process is always a number between 0 and 1.
a percentage
56
What does “p” stand for?
precipitation
people
practice
proportion of all AP stats students in the district that passed the AP exam
57
What is the 10% condition?
10%
n ≤ 10% N
n=10%
n= 10%<N
58
In Linear, what does I stand for?
Irreplaceable
Independent
Interactive
Intersect
59
In DUFS, what does "D" stand for?
drive
dirt
dive
direction
60
What is the Response Variable?
It is referred to as a DEPENDENT
A variable that changes its results
Referred to as INDEPENDENT
When you respond on the phone
61
What is a random variable?
sigmas
a complete stranger
p values
Takes on all possible number values for outcomes of a random event
62
What are the 3 things you need for “Check”?
Random, 10%, and Large Counts
context, random, conclusion
10%, interest rate, random
large counts, conclusion, context
63
What is the scatter plot?
dependent variable
independent variable
a bunch of x's
distribution of paired data
64
What happens to the intervals when we change the confidence level?
reset from 70% to 85%
Without clicking “RESET”, drag the confidence level from 80% to 95%
no reset
confidence level at 100
65
What is a percentile?
Describe a specific location within a distribution.
The middle of the histogram bars
The average color of the graph
A percentile is the number of times a value appears in a date
66
What is the explanatory variable?
Referred to as INDEPENDENT
Variable that changes results
Referred to as DEPENDENT
Respond on the phone
67
What is a step in conducting a significance test for a mean?
assume the sample is biased to match population trades
Choose the inference procedure and set it up
Ignore the sample size and collect data,
skip checking conditions before calculations
68
What is a Z-Score?
Measure a score as related to the other scores in the data set
A Z-score is your final score on a zombie survival quiz.
A Z-score tells you how many zeros are in your data.
A Z-score is the point where the graph makes a zigzag.
69
Which of the following is a condition that must be checked before creating a Confidence interval for a single mean
the sample size must be exactly 30
the sampling method must be already known
The population must be a certain size,
data must come from a random sample or randomized experiment
70
What is a simple random sample?
Every group has equal chance of selection
Systematic error in data collection
A sample from each subgroup
No treatment is applied
