Ask Question, Ask an Expert


Ask Statistics and Probability Expert

Average of daily rainfalls for weekdays and weekends 

1. A sample of n = 9 has a mean of M = 10. One person with a score of X = 2 is removed from sample. What is the value of the new sample mean?

Hint: From the knowledge of n and M get the sum of the scores. Then subtract 2 from this sum and divide by the new n =8.

 2. Does it ever seem to you that the weather is nice during the work week, but lousy on the weekend? Cerveny and Balling (1998) have confirmed that this is not your imagination; pollution accumulating during the work week most probable spoils weekend weather for people on the Atlantic coast. Consider the following hypothetical data showing the daily amount of rainfall for 10 wks throughout the summer.


        Rainfall on Weekdays              1.2, 0.6, 0.0, 1.6, 0.8, 2.1, 0.2, 0 .9, 1.1, 1.4

        Rainfall on Weekends               1.5, 2.0, 1.8, 1.5, 2.2 2.4, 0.8, 1.6, 1.2, 1.7 


a. work out the average daily rainfall during the week and for the weekends. Hint: Obtain the average of the weekdays' rainfalls and the average of the weekend's rainfalls.

b. Based on the two means, does there appear to be a pattern in the data? Based on part (a) make your conclusion.

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M918162

Have any Question? 

Related Questions in Statistics and Probability

1 when do researchers use regression analysis2 what is

1. When do researchers use regression analysis? 2. What is multiple regression analysis? 3. Distinguish among simultaneous (or standard), stepwise, and hierarchical regression.

Suppose that a ge 3 and let f be a social welfare function

Suppose that |A| ≥ 3, and let F be a social welfare function satisfying the properties of unanimity and independence of irrelevant alternatives. What are all the decisive coalitions?

Among the best companies to work for in the us 33

Among the best companies to work for in the US, 33% experienced double digit job growth, 49% experienced single digit growth, and 18% experienced no growth or decline. A closer examination of the 30 companies that make u ...

Exposure to medicine x during pregnancy was investigated

Exposure to medicine 'x' during pregnancy was investigated for 108 mothers of children with congenital defects and 108 mothers of normal controls. The researchers examined exposure to medicine 'x' during the first trimes ...

Find the indicated area under the standard normal curve to

Find the indicated area under the standard normal curve. To the left of z= - 1.96 The area to the left of z = -1.96 under the standard normal curve is __.(Round to four decimal places as needed.)

The university is attempting to set its staffing plan for

The University is attempting to set its staffing plan for the next several year, and it wants to determine if the distribution of students among various graduate majors has changed from the historical averages which were ...

I love juliet and i know that juliet loves me but i do not

I love Juliet, and I know that Juliet loves me, but I do not know if Juliet knows that I love her. Provide an Aumann model of incomplete information that describes this situation, and specify a state of the world in that ...

1 true or false justify for

1. True or False. Justify for fullcredit. (a) A is an event, and Ac is the complement of A, then P(A AND Ac ) =0. (b) If the variance of a data set is 0, then all the observations in this data set must bezero. (c) If a 9 ...

How might one relate einsteins theory of relativity to

How might one relate Einstein's theory of relativity to mathematical perspective in art?

Consider the following gameyou pay 100 and a fair 6-sided

Consider the following game. You pay $1.00 and a fair 6-sided die is rolled. If the roll is 1 or 3, then you get your dollar back and the game ends. If the roll is 5, you get $2.00 back (your dollar plus an additional do ...

  • 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