Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

1) Companies which design furniture for elementary school classrooms create a variety of sizes for kids of various ages.  Assume the heights of kindergarten children can be describeed by a Normal distribution with a mean of 37.2 inches and standard deviation of 2.1 inches.

a) What fraction of kids must the company expect to be less than 35 inches tall?

b) In what height interval must the company expect to determine the middle 70% of kindergarteners?

c) At least how tall are the biggest 15% of students?

2) Bank Accounts: You work for business analytics department of a large commercial bank, and you learn that balances of small-business accounts are distributed on log-scale according to a normal distribution.  You also learn that the lower and upper quartiles of the balances are $500 and $50,000, respectively.  In the sub-problems given below you will end up inferring in small steps what a 95% range of the bank balances is.

a) Determine the lower and upper quartiles of the log10-balances?

b) Determine the mean and standard deviation of log10-balances?

c) Determine a 95% range of the log10-balances?

d) Determine a 95% range of the balances in $s?  Express in English what the two boundaries mean.

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M910350

Have any Question? 


Related Questions in Statistics and Probability

Suppose the arrival of calls at a switchboard is modeled as

Suppose the arrival of calls at a switchboard is modeled as a Poisson process with the rate of calls per minute being  (a) What is the probability that the number of calls arriving in a 10-minute interval is less than 10 ...

Let xy andnbsp z be a set of independent zero-mean

Let X,Y and  Z be a set of independent, zero-mean, unit-variance, Gaussian random variables. Form a new set of random variables according to (a) Find the three one-dimensional marginal PDFs  (b) Find the three two-dimens ...

Several questions refer to the basic sample persons whose

Several questions refer to the Basic Sample: persons whose age is in the 21-27 (inclusive) range, who are working at least 40 hours per. Consider the Basic Sample only. Create standardizations (z-scores) of for the varia ...

Question 1 if a study has 3 groups of 25 subjects each the

Question 1: If a study has 3 groups of 25 subjects each, the degrees of freedom are 2 and 24. a. True. b. False. Question 2: It is possible for all paired means to be statistically significant. a. True.  b. False. Questi ...

Text barbara illowsky page 271 problem 88a school

Text: Barbara Illowsky Page 271, Problem 88 A school newspaper reporter decides to randomly survey 12 students to see if they will attend Tet (Vietnamese New Year) festivities this year. Based on past years, she knows th ...

Let a random process consist of a sequence of pulses with

Let a random process consist of a sequence of pulses with the following properties: (i) the pulses are rectangular of equal duration,? (with no "dead" space in between pulses), (ii) the pulse amplitudes are equally likel ...

Thirty percent of a corporations blue-collar employees were

Thirty percent of a corporation's blue-collar employees were in favor of a modified health care plan, and 23% of its blue-collar employees favored a proposal to change the work schedule. Thirty- percent of those favoring ...

Please write a quick response to this giving an example of

Please write a quick response to this giving an example of when binomial distribution would be used. Use 50 words or less please In reference to statistics, binomial distribution is defined as the frequency distribution ...

Read isl p43-51 the lab section of chapter 1 this is a good

Read ISL p.43-51, the Lab section of chapter 1. This is a good getting-started guide to R. To follow along you will need to download the data sets from Data Sets and Figures from the ISL website (http://www-bcf.usc.edu/~ ...

For a constant k two discrete random variables have a joint

For a constant k, two discrete random variables have a joint PMF given by (a) Find the value of the constant in terms of K. b) Find the marginal PMFs,  (c) Find

  • 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

A cola-dispensing machine is set to dispense 9 ounces of

A cola-dispensing machine is set to dispense 9 ounces of cola per cup, with a standard deviation of 1.0 ounce. The manuf

What is marketingbullwhat is marketing think back to your

What is Marketing? • "What is marketing"? Think back to your impressions before you started this class versus how you

Question -your client david smith runs a small it

QUESTION - Your client, David Smith runs a small IT consulting business specialising in computer software and techno

Inspection of a random sample of 22 aircraft showed that 15

Inspection of a random sample of 22 aircraft showed that 15 needed repairs to fix a wiring problem that might compromise

Effective hrmquestionhow can an effective hrm system help

Effective HRM Question How can an effective HRM system help facilitate the achievement of an organization's strate