Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

Z test for mean amount of money withdrawn from ATMs.

ATMs should be stocked with sufficient cash to satisfy customers making withdrawals over an entire weekend. But if too much cash is kept unnecessarily in ATMs, bank is forgoing the opportunity of investing the money and earning interest. Assume that at a particular branch, population mean amount of money withdrawn from ATMs per customer per transaction over the weekend is $160, with a population standard deviation of $30.

If a random sample of 36 customer transactions indicates that sample mean withdrawal amount is $172, is there evidence to believe that the population mean withdrawal amount is no longer $160? (Use a 0.05 level of significance.)

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M918280

Have any Question? 


Related Questions in Statistics and Probability

1 suppose the mean test scores for a college enter exam is

1) Suppose the mean test scores for a college enter exam is normally distributed with mean = 78 and standard deviation = 12. a). If an individual student is selected at random, what is the probability that this student's ...

Many grocery stores and large retailers such as wal-mart

Many grocery stores and large retailers such as Wal-Mart and K-Mart have installed self checkout systems so shoppers can scan their own items and cash out themselves. How do customers like this service and how often do t ...

At a university the average cost of books per student has

At a university, the average cost of books per student has been $400 per student per semester. The Dean of Students believes that the costs are increasing and that the average is now greater than $400. He surveys a sampl ...

A parcel of land purchased by clean energy inc is estimated

A parcel of land purchased by Clean Energy, Inc. is estimated to contain 15.25 million tons of anthracite coal. The purchase price was $10,850,000, startup costs were $3,411,000, and the residual value is $1,464,000. If ...

1 do outliers increase or decrease the magnitude of

1. Do outliers increase or decrease the magnitude of correlation coefficients? 2. What impact does reliability have on correlation? 3. Why can't we infer causality from correlation?

Please show the work to make it understandablea large

Please show the work to make it understandable A large company is interested in knowing whether there is any relationship between a person's age and that person's opinion about a new wage incentive plan. A random sample ...

Using the table below compute the spearman rank correlation

Using the table below, compute the spearman rank correlation coefficient for the aggressiveness scores. Does this suggest that both twins tend to be similar in degrees of aggressiveness? Twin set 1 st  born aggressivenes ...

Objectivenbspstudents will assume the identity of a person

Objective:  Students will assume the identity of a person living in the north or south during the Civil War and provide a personal experience in the form of a letter. Most of what we know of history prior to technologica ...

1 what advantage do experiments have over descriptive and

1. What advantage do experiments have over descriptive and correlational studies? 2. A well-designed experiment possesses what three characteristics? 3. Distinguish between qualitative and quantitative levels of an indep ...

Through the feasted landscapes sustainability in american

Through the Feasted Landscapes Sustainability in American Topics, Chapter "The Work of the U.S. Sanitary Commission (1864)": 1. At first, who resisted civilian participation in providing food supplies and medical assista ...

  • 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

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

Describe what you learned about the impact of economic

Describe what you learned about the impact of economic, social, and demographic trends affecting the US labor environmen