




Card 12 / 20:
Suppose that 600 thirtyyearolds were surveyed to determine whether or not there is a relationship between the level of education an individual has and salary. Conduct a test of independence.

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Questions & Answers
can anyone explain it better for me
ADAM
noun
STATISTICS
a mathematical function showing the number of instances in which a variable takes each of its possible values.
Robin
Common language taking a bunch of information and seeing if it is related or not to other info
Mandy
Does standard deviation have measuring unit?
Mohamed
yes, the measuring unit of the data you are looking at, for example centimetres for height.
Emma
is that easy to plot a graph between three axis?
Mohamed
yes we can but we do not have that much effective tools. If the graph is normal or less complicated then it is plotted effectively otherwise it will give you nightmare.
umair
whats the difference between discrete and contineous data
umar
Discrete variables are variables that can assume finite number of values. Continuous variables are variables that can assume infinite number of values
Mike
i will give you an example:
{0,4,84} it contains discrete or limited values like it can also contain boolean values{true,false} or {0,1} and continuous are like {1,2,3,4,5......} ,
{0,0.1,0.2,0.3,0.4...........}
umair
a no. of values which are countable are called discrete variables on the other hand, a no. of values which are not countable are called continuous variables
Aliya
Yup, I would like to support Mr.Umair's argument by saying that it can only apply if we have a 3D graph,otherwise a plane graph will not apply at all
festus
Aliya and Mike thnks to both of you ❤❤
umar
what's case control study?
Shakilla
In probability theory and statistics, covariance is a measure of the joint variability of two random variables.[1] If the greater values of one variable mainly correspond with the greater values of the other variable, and the same holds for the lesser values, (i.e., the variables tend to show simila
Robin
Economics department, faculty of social sciences, NOUN. You are required to calculate:
the covariance and
State whether the covariance is positive or negative. (11½ marks)
Observation
E
D
1
15
17.24
2
16
15.00
3
8
14.91
4
6
4.50
5
15
18.00
6
12
6.29
7
12
19.23
8
18
18.69
9
12
7.21
10
20
4
Florence
In probability theory and statistics, covariance is a measure of the joint variability of two random variables.
Robin
what is the purpose of statistics and why it is important that statistics to be a solo and one complete field?
to organize,analyze and interpret information in order to make decision
Berema
so simple.
the name of any person,place or thing.
Eduinfo
Using the Chisquare test, two coins were flipped a hundred times. What will
be the chances of getting a head and getting a tale? Given observed values is
62 heads and 38 tails. Expected value is 50 heads, 50 tails. Is the difference
due to chance or a significant error?
a. Draw your hypothesis
what is difference between the blocking and confounding
can you explained it for me
korankye
an easier definition of inferential statistics
Inferential statistics makes inferences and predictions about a population based on a sample of data taken from the population in question.
Rukhsana
Inferential statistics helps you to extract insights from a random sample data which then helps you to use specific predictive Modeling/machine learning technic to predict or forecast.
Manish
what is stemplot? can anyone explain?
Javokhirbek
what is collection of data
ernest
no collection data was provided just the mean =14
Leticia
sd=14 describe the position of score to the mean how many points below or above z=1.00 z=1.50
Leticia
I have this sample score 14 18 12 22 14
22 21 20
13 26 13 26 16
21 they want me to.compute the z score of x= 15 ×=40 and x=9?
Leticia
how do you understand that it is the mean?
Kenedy
factors to consider when using secondary data
define binomial distribution
the distribution in which the outcome is of dichotomous
bimal
can you tell me Standar division is =14 what is the position of the score relative to the mean how many point above/below the mean?
Leticia
What do you call a measure of central tendency (i.e., average) appropriate for data measured on the continuous scale
Source:
OpenStax, Introductory statistics. OpenStax CNX. May 06, 2016 Download for free at http://legacy.cnx.org/content/col11562/1.18
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