Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

Difference in the level of satisfaction with service between the two branches.

A bank is comparing the quality of service given by its two most important branches.  In branch A, 192 out of a random selection of 300 of its customers said that they were satisfied with the service.  In branch B, 138 out of 250 randomly selected customers said that they were satisfied with the service. 

find out approximately with 90 percent confidence the difference in the level of satisfaction with service between the two branches.

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M920978

Have any Question? 


Related Questions in Statistics and Probability

A new process is proposed for the manufacture of steel

A new process is proposed for the manufacture of steel shafts, Data are 6.38, 6.40, 6.41, 6.38, 6.39, 6.36 and 6.37. Target is 6.40. a. What is the expected loss? b. What is the standard deviation?

A clinical trial is being planned to investigate the effect

A clinical trial is being planned to investigate the effect of a new experimental drug designed to reduce total serum cholesterol. Investigators will enroll participants with total cholesterol levels between 200-240, the ...

Christine has always been weak in mathematics based on her

Christine has always been weak in mathematics. Based on her performance prior to the final exam in Calculus, there is a 45% chance that she will fail the course if she does not have a tutor. With a tutor, her probability ...

Answer the following questions showing all work1 using

Answer the following questions showing all work. 1. Using http://onlinestatbook.com/stat_sim/sampling_dist/index.html, select a population distribution that is NOT normal (i.e., heavily skewed, uniform, bimodal). Using t ...

You are playing blackjack in a casino the casino is using a

You are playing blackjack in a casino. The casino is using a single, 52 card deck. Shuffling the deck takes time. So rather than shuffling the deck after each hand, the casino deals three hands before shuffling. The used ...

1 what is validity2 distinguish between face validity

1. What is validity? 2. Distinguish between face validity, construct validity, and criterion-related validity. In general, which kind of validity is least important to researchers? 3. Can a measurement procedure be valid ...

A research concludes that the number of hours of exercise

A research concludes that the number of hours of exercise per week for adults is normally distributed with a mean of 3.5 hours and a standard deviation of 3 hours. Show all work. Just the answer, without supporting work, ...

An economist wants to estimate the mean per capita income

An economist wants to estimate the mean per capita income (in thousands of dollars) for a major city in Texas. He believes that the mean income is $23.8, and the standard deviation is known to be $8.9. How large of a sam ...

Two pollsters are conducting surveys to estimate the

Two pollsters are conducting surveys to estimate the proportion of Clarkston, Michigan citizens who support a bond issue to build a sports stadium. Both pollsters use the same methods; however, their sample sizes differ. ...

A random sample of the price of gasoline from 40 gas

A random sample of the price of gasoline from 40 gas stations in a region gives the statistics below. Complete parts a) and b). ybar = $3.79, s = $0.27 a) Find a 95% confidence interval for the mean price of regular gaso ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

WalMart Identification of theory and critical discussion

Drawing on the prescribed text and/or relevant academic literature, produce a paper which discusses the nature of group

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro