Log in
Statistics
8
answers
0
watching
297
views

The role of probability in inferential statistics

How is probability used in inferential statistics?

(a)  A researcher uses probability to decide whether the sample he obtained is likely to be a sample from a particular population.

(b) A researcher uses probability to decide whether to use inferential or descriptive statistics.

(c)  A researcher uses probability to calculate the mean value of a sample.

Watch
8
answers
0
watching
297
views

For unlimited access to Homework Help, a Homework+ subscription is required.

Unlock all answers

Get 1 free homework help answer.
Already have an account? Log in
Share
Already have an account? Log in
Share
Already have an account? Log in
Share
Already have an account? Log in
Share
Already have an account? Log in
Share
Avatar image
Read by 1 person
Already have an account? Log in
Share
Avatar image
Read by 1 person
Already have an account? Log in
Share
Karol E.
Karol E.Lv8
18 Mar 2021
Already have an account? Log in
Share

Related textbook solutions

Introductory Statistics
OER Edition, 2013
Openstax
ISBN: 9781938168208

Related questions

In inferential statistics, we calculate statistics of sample data to ______________.

A. estimate unknown population parameters and conduct tests about unknown population parameters

B. estimate unknown population parameters

C. None of the Answers

D. conduct tests about unknown population parameters

1. Matt, the manager, wants to estimate the mean wait time for customers to check out in his Mini-Market. He randomly selects customers and determines the mean wait time is minutes. Define the following for this exercise:

a) Is the data collected qualitative or quantitative?

b) Variable (x):

c) Population of Interest:

d) Sample:

e) Parameter of Interest and Statistic: Do you expect the parameter and the statistic to be the same value? Explain.

f) Discuss the use of descriptive and inferential statistics in this exercise.

g) Is the variable, x, discrete or continuous?

 

2. Identify the population and sample for the following examples:

The P.E. coach of a middle school interested in the mean height for the graders in the school. He randomly selects graders and measures the height of each.

a) Population:

b) 7thgraders Sample:

c) A community college notices that an increasing number of full-time students are working while attending school. The administration randomly selects 200 students and determines how many hours per week each student works.

A researcher is evaluating the influence of a treatment using a sample selected from a normally distributed population with a mean of u = 80 and a standard deviation of o = 20. The researcher expects a 12-point treatment effect and plans to use a two-tailed hypothesis test with a .05.

a. Compute the power of the test if the researcher uses a sample of n = 16 individuals. (See Example 8.6.)

b. Compute the power of the test if the researcher uses a sample of n = 25 individuals

Weekly leaderboard

Home
Homework Help 3,900,000
Statistics 10,000
Start filling in the gaps now
Log in