




Card 7 / 15:
Suppose that three book publishers were interested in the number of fiction paperbacks adult consumers purchase per month. Each publisher conducted a survey. In the survey, adult consumers were asked the number of fiction paperbacks they had purchased the previous month. The results are as follows:
Find the relative frequencies for each survey. Write them in the charts.Using either a graphing calculator, computer, or by hand, use the frequency column to construct a histogram for each publisher's survey. For Publishers A and B, make bar widths of one. For Publisher C, make bar widths of two.In complete sentences, give two reasons why the graphs for Publishers A and B are not identical.Would you have expected the graph for Publisher C to look like the other two graphs? Why or why not?Make new histograms for Publisher A and Publisher B. This time, make bar widths of two.Now, compare the graph for Publisher C to the new graphs for Publishers A and B. Are the graphs more similar or more different? Explain your answer.

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Questions & Answers
if x is a continuous random variable and` c` is a constant then p(x=c)
the length of human pregnancies from conception to birth approximates a normal distribution with a mean of 266days and a standard deviation of 16days.(i) what length of time marks the shortest 10%of all pregnancies ?
Neha
how can I solve a Hypothetic problem that provide sample data such as 45,3_,45,28,17 ect...what is the first step
Leticia
Where can we check the answers to the review questions?
Calculate theta if one minus theta times hundred percent is equal to ninety five cI
what's poison distribution
what's poissan distribution?
Abdulhakim
It's Poisson. It's a discrete probability distribution that is used to find the probability of an event x happening within a fixed interval of time. E. g. If a shop sells an average of 5 goods on Saturdays, what is the probability that the shop will sell 7 goods on a particular Saturday.
samoyo
which kind of work do statistics do
how so I know the right answers
what are events in statistics
Like a roll of a dice! Or a coin toss. Or a gender reveal party!
can anyone explain it better for me
ADAM
the science of statistics deal with the collection, analysis, interpretation and presentation of data
saquib
I am also studying statistics
saquib
Correlation regression, explain it to me in short.
guillio
correlation is used to find relationship between two and dependent ), regression used for predicting the future by analyzing past data
Arun
correlation is used to find relationship between two variables
Arun
dependent and independent eg. profit is dependent on sales
Arun
Statistics has been designed as the mathematical science of making decisions and drawing conclusions from data in situations of uncertainty. It includes the designings of experiments, collection, organization, summarization snd interpretation of numerical data.
Aliya
excellent Aliya.....
good...Arun....
IRFAN
The degree or strength of relationship(interdependence) between the variables is called "correlation ".
Examples: heights and weights of children, ages of husbands and ages of wives at the time of their marriages, marks of students in mathematics and in statistics.
Aliya
The dependence of one variable (dependent variable) one one or more independent variables ( independent variables) is called "regression ".
Aliya
simply regression and multiple regression are the types of regression.
Aliya
IRFAN HAIDER thanks
Aliya
I need help with a math problem
nabil
9. The scatterplot below relates wine consumption (in liters of alcohol from wine per person per year) and death rate from heart disease (in deaths per 100,000 people) for 19 developed countries.
nabil
For questions e. and f. use the equation of the LeastSquare Regression LSR line is: y = −22.97x+260.56 e. Circle the correct choice and fill in the blank in the following statement: As wine consumption increases by 1 liter of alcohol per person per year, the predicted death
nabil
Rate from heart disease increases/decreases by ______deaths per ________people.
nabil
is a scientific study of collection analysis interpretation and also presenting it by researchers.
Murtala
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
* Consider a study of 300 males aged 18 years or higher conducted in a city called D. The study indicates that there are 10% smokers. Answer the following questions:
What is the sample?
What is the population?
What is the variable of interest?
What is the scale of measurement used for the variab
Abdulhakim
Consider a study of 300 males aged 18 years or higher conducted in a city called D. The study indicates that there are 10% smokers. Answer the following questions:
What is the sample?
What is the population?
What is the variable of interest?
What is the scale of measurement used for the variabl
Abdulhakim
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
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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