Justify a statement that business had improved

Assignment Help Basic Statistics
Reference no: EM131870429

A coffee shop sells on the average 320 cups of coffee per day, with a standard deviation of 40. After advertising, they find that on 7 days they sell an average of 350 cups.

(a) Has advertising left their business unchanged? Calculate the prob-value.

(b) If the owner of the coffee shop specifies that the type I error of the test (significance level) is to be 5 %, do you reject the hypothesis that business is unchanged?

(c) What assumptions have you made implicitly in parts (a) and (b)? Under what conditions are they questionable?

(d) If coffee sales can be observed for 25 days, what would the average sales have to be in order to justify a statement that business had improved, at the 5 % significance level?

Reference no: EM131870429

Questions Cloud

Hypothesis that the new conditions grow no better plants : (a) At the 5 % significance level, test the hypothesis that the new conditions grow no better plants.
How would payment differ if you paid interest only : The furniture store offers you a 3-year loan with an 11 percent APR. What are the monthly payments? How would the payment differ if you paid interest only?
Calculate the prob-value : (a) Calculate the prob-value, and interpret.
What are the challenges of delivering learning to employees : Employee Training and Development (HR 313) - What are the challenges of delivering learning to employees who work on the road or at home?
Justify a statement that business had improved : What would the average sales have to be in order to justify a statement that business had improved, at the 5 % significance level?
About the interest-on-interest : Interest-on-Interest Consider a $2,300 deposit earning 9 percent interest per year for 8 years. How much total interest is earned on the original deposit.
How marketing environment affect marketing decision-making : How do elements of a marketing environment affect marketing decision-making (The political, legal, and regulatory forces of the marketing environment.
Develop intermediate-level web page consisting of valid html : Design and develop an intermediate-level Web page consisting of valid HTML content that includes semantic elements, images, and tables.
Weigh the claim that the mean salary : To weigh the claim that the mean salary in the second profession is no larger than in the first profession, calculate the prob-value.

Reviews

Write a Review

Basic Statistics Questions & Answers

  Construct a payoff table for given consumer

Construct a payoff table for this consumer, including probabilities and payoff amounts that you feel might be realistic.

  A fair six-sided die with numbers 123456 is rolled

a fair six-sided die with numbers 123456 is rolled independently 500 times. approximate the probability that the sum is

  The operationalization of a construct means that there

the operationalization of a construct means that there must be looked for as many related dimensions and elements of

  Relationship between the size of a home

A real estate agent wants to determine if there is a relationship between the size of a home in square feet and the list price. She randomly selects 50 homes in her local market that are currently listed for sale and records two quantitative varia..

  Explain what an outlier is

Explain what an outlier is

  Estimate standard error for estimated slope coefficient

The "t-statistic" for testing whether the slope parameter was unity or not was -3.6. What is the estimated standard error for the estimated slope coefficient?

  Find probability that mean salary of teachers is greater

Mathml equation = $32,000 and mathml equation = $3000. If 100 teachers are randomly selected, find the probability that their mean salary is greater than $32,500.

  Hypothesis understanding

Suppose that we observe a random sample size n from a normally distributed population. If we are able to reject H0:µ = µ in favor of a two-tailed alternative hypothesis at the 10% significant level

  Below are data showing the results of six subjects on a

below are data showing the results of six subjects on a memory test. the three scores per subject are their scores on

  Probability and z score of normal distribution

Scores on an endurance test for cardiac patients are normally distributed with mean = 182 and standard deviation = 24.

  Compute the probability-chance of winning the series

Assume that to Shantanu, any dollar amount one year from now is worth as much as any dollar amount today. Suppose that Shantanu thinks that the Red Sox.

  Discuss perform qualitative risk analysis

In one page, discuses Perform Qualitative Risk Analysis, Procurement Introduction and Control Procurement in project management terms.

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!

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