User Account

All Pages

Market shares of four firms

Assignment Help Basic Statistics
Reference no: EM131880606

Past data suggests that the market shares of four firms (A, B, C, and D) are 30%, 25%, 15%, and 30% respectively. A random sample of 120 customers showed that 28 bought the product from A, 28 from B, 24 from C, and 40 from D.

We need to test whether this data provides evidence that the market shares have changed. The hypotheses are

H0: pA = 0.3, pB = 0.25, pC = 0.15, and pD = 0.3

H1: pA, pB, pC, pD are not as given above.

(here pA is the market share of A, i.e. the population proportion of customers who buy the product from A).

We need to test this at 5% level of significance.

If H0 is right, what is the expected number of customers who would buy the product from firm B?

What is the value of the appropriate test statistic? (Provide two decimal places)

Reference no: EM131880606

Questions Cloud

What sort of investor behaviour do you think tom is showing : What sort of investor behaviour do you think Tom is showing? What sort of investor behaviour do you think Willie and Simon are showing?
Population proportion of adults : Construct a 95 % confidence interval for the population proportion of adults who believe in UFOs.
Predicted total body weight for a female athlete : The predicted total body weight for a female athlete who is 69 inches tall is
The impact of technology on the developing child : After reflecting on "The Impact of Technology on the Developing Child" and "Is the Internet hurting children?"
Market shares of four firms : Past data suggests that the market shares of four firms (A, B, C, and D) are 30%, 25%, 15%, and 30% respectively.
Record the journal entries for the transactions : Jan. 11 Issued 21,550 shares of common stock at $16 per share. Record the journal entries for the transactions listed above
Crete llc manufactures and distributes solar panel : Crete LLC manufactures and distributes solar panel for the consumer market. Your job is to submit a proposal that meets their criteria.
Probability that an observation falls in bin : In setting up bins for the "goodness of fit" test for a Normal distribution, one bin was 617 to 629. If the variable followed a Normal distribution
What the net present value from an mba degree : What the net present value from an MBA degree? Based on this cost-benefit analysis, should you pursue an MBA degree?

Reviews

Write a Review

Basic Statistics Questions & Answers

  How many levels does each of the factors have

A certain drug known to affect coordination can be administered in three ways: orally, by injection under the skin, or by injection into a vein. How many levels does each of the factors have

  A certain desert region the number of persons

In a certain desert region the number of persons who become seriously ill each year from eating a certain poisonous plant is a random variable having a Poisson distribution with λ = 5.2. Use Table II of "Statistical Tables" to find the probabiliti..

  Find the minimum score

Students with scores in the top 5% will receive an "A". Find the minimum score (round to nearest whole number) that gets an "A".

  Significant linear relationship

The city of denver wishes to see if there is a linear relationship between temperature and the amount of electricity used (in kilowatts) Based on the data below, is there a significant linear relationship between temperature and the amount of elec..

  Historians have used to learn about sumerian

Make a list of 10 different pieces of evidence that historians have used to learn about Sumerian. Akkadian, Old Babylonians (Hammurabi),

  Provide background information on the chosen organization

Students will choose a company of their liking and use any of the 2 (qualitative or quantitative) research and analysis methods to demonstrate selected perceptions of the company

  Effectiveness of the hair restoration

Describe how a study could test the effectiveness of the hair restoration drug Rogaine using a combination of paired and two-sample designs.

  Average of the outstanding loans

Another student graduated from a university with an outstanding loan of $12,360 where the average of the outstanding loans was $10,326 with a standard deviation of $2143. Which student had a higher debt in relationship to his or her peers?

  Probability that random variable will be above it is 0.25

If X is a normally distributed random variable with mean -61 and standard deviation 22, find the value such that the probability that the random variable will be above it is 0.25.

  Probability that any given driver will be detained

Drunks. Police often set up sobriety checkpoints roadblocks where drivers are asked a few brief questions to allow the officer to judge.

  Introduction of new fast food outlet

A campus program evenly enrolls undergraduate and graduate students. If a random sample of 4 students is selected from the program to be interviewed about the introduction of new fast food outlet on the ground floor of the campus building,

  Various stepwise approaches and best-subsets

Based on the various stepwise approaches and "best-subsets" approaches for selecting an excellent (if not optimal) fitted multiple regression model, which one approach would you select if you had to explain to a client what your chosen model is an..

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

Submit Assignment

Academics

Major Subjects

Majors

Get In Touch

whatsapp: +1-415-670-9521

Phone: +1-415-670-9521

Email: [email protected]

TERMS & POLICIES

HELP & SUPPORT

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd