Question

. Describe the difference between a "population" and a "sample." What is a "representative sample"? What is the best way to achieve representativeness in a sample?

Answer #1

**population**is defined as total group of individuals of a defined group that we are studying or collecting information for data driven desicions.- eg:mean height of men,it includes all men that have lived,are alive,and will live in future.
- it is impossible to survey such an entire population as not all the members are observable.
- it is costly
- it is time consuming.

**sample** is a part of population selected as a
group of people who take part in the investigation.

- eg: measuring mean height of a sample of people selected from the population
- it is cost effective
- doesnt consume much time
- disadvantage:since fewer members are under study ,it leads to loss of some information.

**representative sample** is a small quantity of
something that accurately reflects the larger entity.eg:in a class
room of 30 students,half the students are males and half the
students are females,a representative sample would include six
students:3 males and 3 females.

any sampling method that uses random selection or random sampling or probability sample technique is the best way to achieve representativeness in a sample.. hence probability sampling is the best way.

a. What is the difference between population mean and sample
mean?
b. Describe the difference between point estimate and a
confidence interval?
c. Describe the role that confidence level play in the
confidence interval?

What is the best way to select a representative sample
when you have a sampling frame of the study population

___________ is one way of ensuring that a sample is
representative of the population. Question 13 options: The
two-tailed test The between-subjects design The sign test Random
sampling

1.
What is the difference between population and sample? Use samples
to explain.

What could be the explanation for the difference between the
sample mean and the population mean ?

Given a scenario describe a "research question" with an implied
population, implied sample, a given parameter - What is the best
way to help students identify: Population, parameter, sample,
statistic, variable, and data...

1. The difference between a sample mean and the population mean
or the difference between the means of two random samples is
called: A. nonresponse error. B. selection bias. C. sampling error.
D. nonsampling error.
2. The manager of the customer service division of a major
consumer electronics company is interested in determining whether
the customers who have purchased a videocassette recorder over the
past 12 months are satisfied with their products. If there are 4
different brands of videocassette...

What is the difference between population parameters and sample
statistic. Which one will you choose instead?

Probability And Statistics
Question:
What is the difference between sample and population?
Why we have choose sampling method instead of population analysis?
Explain sampling procedures with suitable examples?

1. What is the difference between population proportion vs
sample proportion vs probability? Please explain.

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