Ask Question, Ask an Expert


Ask Statistics and Probability Expert

problem 1:

a) Out of 800 families with 5 children each, how many would you expect to have:

i) 3 boys
ii) 5 girls
iii) Either 2 or 3 boys

b) Suppose that 50% of all engineering students are good in mathematics. Find out the probabilities that among 18 engineering students:

i) Exactly 10
ii) At least 10
iii) Utmost 8 are good in mathematics

problem 2:

a) The marks obtained in Mathematics by 1000 students are normally distributed with mean 78% and standard deviation 11%. Find out:

i) How many students got marks above 90%?
ii) What was the highest mark obtained by the lowest 10% of the students? Within this limits did the middle of 90% of the students lie.

b) In 256 sets of 12 tosses of coin, in how many cases one can expect 8 heads and 4 tails.

problem 3: A Population comprises of 4, 8, 12, 16, 20. Consider all samples of size three which can be drawn without replacement from this population. Determine:

a) Mean of the population.
b) Standard deviation of the population.
c) Mean of the sampling distribution of means.
d) Standard deviation of the sampling distribution of means.
e) Compare the results of (a), (c) and (b), (d). Find out correction factor of the population.

problem 4:

a) A random sample of size 100 is taken from an infinite population having the mean 76 and the variance 256. Determine the probability that the sample mean will be between 75 & 78.

b) A sample of size 400 is taken from a population whose standard deviation is 16. Find out the standard error and probable error. 

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M93265
  • Price:- $60

Priced at Now at $60, Verified Solution

Have any Question? 

Related Questions in Statistics and Probability

A spinoff of the anti-war and civil rights movements of the

A spinoff of the anti-war and civil rights movements of the 1960s that affected women was? increased desire to return to the security of homes and families decreased political involvement. the birth of the women's libera ...

1 what value of cronbachamp39s alpha coefficient indicates

1. What value of Cronbach's alpha coefficient indicates acceptable interitem reliability? 2. Why are researchers sometimes not able to test the reliability of their measures? 3. What steps can be taken to increase th ...

1 distinguish between theory model and hypothesis2 describe

1. Distinguish between theory, model, and hypothesis. 2. Describe how researchers use induction versus deduction to generate research hypotheses. 3. Describe the process by which hypotheses are developed and tested.

1 what are time-series research designs and how are they

1. What are time-series research designs, and how are they used to learn about changes in behavior over time? 2. What types of independent variables can be used in participant-variable research designs, and what conclusi ...

Jim has weighted gpa of 384 his high school gpas are

Jim has weighted GPA of 3.84. His high school GPA's are normally distributed with a mean of 2.9 and a standard deviation of 0.5. Kim's high school uses unweighted GPA's and she has a GPA of 3.57. GPA's are also normally ...

Net exports are calculated by subtracting imports from

Net Exports are calculated by subtracting Imports from Exports. Assume Exports and Imports are independent of one another.  If mean exports are $25M with a standard deviation of $3.5M and mean imports are $30M with a sta ...

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 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 ...

A history class is comprised of 8 female and 6 male

A history class is comprised of 8 female and 6 male students. If the instructor of the class randomly chooses 5 students from the class for an oral exam, what is the probability that 2 female students and 3 male students ...

This course is designed to provide you with the knowledge

This course is designed to provide you with the knowledge and skills in application, evaluation, analysis, and interpretation of biostatistical data used to inform public health programs, policy, and practice. View the o ...

  • 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