Recent questions and answers in Maths & Statistics - CPEN Talk | Computer Engineering Question and Answer

+1 vote

1 answer 238 views

A bag contains 5 red and 4 blue identical balls, if two are selected at random, one after the other, with replacement, find the probability that the first ball is red and the second is blue

answered Dec 5, 2021 in Maths & Statistics by (user.guest)

+1 vote

1 answer 773 views

A dinner plate has 25.12 inches of metal around it. What is the radius of the place using 3.14 for pie.

answered Nov 22, 2021 in Maths & Statistics by (user.guest)

+1 vote

0 answers 146 views

Let f : N → Y be a function defined as f(x) = 4x + 3, where, Y = {y ∈ N: y = 4x + 3 for some x ∈ N}. Show that f is invertible. Find the inverse.

asked Sep 29, 2021 in Maths & Statistics by anonymous

+1 vote

1 answer 247 views

Three babies are given a weekly health check at a clinic, and then returned randomly to their mothers. What is the probability that at least one baby goes to the right mother?

answered Sep 20, 2021 in Maths & Statistics by anonymous

+1 vote

1 answer 953 views

Two events A and B are such that P(A) = 0.5, P(B) = 0.3 and P(A ∩ B) = 0.1. Calculate

answered Sep 20, 2021 in Maths & Statistics by anonymous

+1 vote

1 answer 392 views

You play draughts against an opponent who is your equal. Which of the following is more likely: (a) winning three games out of four or winning five out of eight; (b) winning at least three out of four or at least five out of eight?

answered Sep 20, 2021 in Maths & Statistics by anonymous

+1 vote

1 answer 420 views

A bag contains fifteen balls distinguishable only by their colours; ten are blue and five are red. I reach into the bag with both hands and pull out two balls (one with each hand) and record their colours.

answered Sep 20, 2021 in Maths & Statistics by anonymous

+2 votes

1 answer 803 views

A fair coin is tossed, and a fair die is thrown. Write down sample spaces for (a) the toss of the coin; (b) the throw of the die; (c) the combination of these experiments.

answered Sep 20, 2021 in Maths & Statistics by anonymous

+2 votes

1 answer 513 views

Describe the sample space and all 16 events for a trial in which two coins are thrown and each shows either a head or a tail.

answered Sep 20, 2021 in Maths & Statistics by anonymous

+1 vote

1 answer 227 views

Let {Xn} and {Yn} be sequences of random variables such that Xn diverges to ∞ in probability and Yn is bounded in probability. Show that Xn + Yn diverges to ∞ in probability.

answered Sep 20, 2021 in Maths & Statistics by anonymous

+1 vote

1 answer 229 views

Let X be a random variable with EX2 < ∞ and let Y = |X|.

answered Sep 20, 2021 in Maths & Statistics by anonymous

+2 votes

1 answer 349 views

An urn contains nine balls, two of which are red, three blue and four black. Three balls are drawn from the urn at random. What is the probability that

answered Sep 2, 2021 in Maths & Statistics by (user.guest)

+1 vote

1 answer 3.0k views

In a large consignment of electric bulb 10% are defective.A random sample of 20 is taken for inspection.Find the probability that a)all are good bulbs b) there are almost 3 defective bulbs c)there are exactly 3 defective bulbs.

answered Aug 31, 2021 in Maths & Statistics by anonymous

+1 vote

1 answer 271 views

Find the probability of selecting either a heart or a face card from a 52 card deck.

answered Aug 31, 2021 in Maths & Statistics by anonymous

+1 vote

1 answer 1.2k views

An urn contains 6 red marbles and 4 black marbles.are drawn without replacement from the urn. What is the probability that both of the marbles are black? Two marbles

answered Aug 31, 2021 in Maths & Statistics by anonymous

+1 vote

1 answer 2.3k views

A coin is tossed three times. What is the probability that it lands on heads exactly one time?

answered Aug 31, 2021 in Maths & Statistics by anonymous

+1 vote

1 answer 223 views

Suppose a coin is flipped 3 times. What is the probability of getting two tails and one head?

answered Aug 31, 2021 in Maths & Statistics by anonymous

+1 vote

1 answer 367 views

Suppose we draw a card from a deck of playing cards. What is the probability that we draw a spade?

answered Aug 31, 2021 in Maths & Statistics by anonymous

+1 vote

0 answers 174 views

Cans of beef stew have a mean content of 300 g each with a standard deviation of 6 g. There are 24 cans in a case. The mean content of a case is therefore (24)(300) = 7200 g. What is the standard deviation of the contents of a case?

asked Aug 30, 2021 in Maths & Statistics by anonymous

+1 vote

1 answer 337 views

A probability function is given by p(0) = 0.3164, p(1) = 0.4219, p(2) = 0.2109, p(3) = 0.0469, and p(4) = 0.0039. Find its mean and variance.

answered Aug 30, 2021 in Maths & Statistics by anonymous

+1 vote

1 answer 582 views

In one case a byte is defined as a sequence of 8 bits. Each bit can be either zero or one. How many different bytes are possible?

answered Aug 30, 2021 in Maths & Statistics by anonymous

+1 vote

1 answer 103 views

Suppose X is N(µ, σ2 ). For a = 1, 2, 3 find P(|X − µ| < aσ).

answered Aug 30, 2021 in Maths & Statistics by anonymous

+2 votes

1 answer 181 views

Suppose X is N(−1, 4). Find (a) P(X < 0); (b) P(X > 1); (c) P(−2 < X < 3); (d) P(|X + 1| < 1)?

answered Aug 30, 2021 in Maths & Statistics by anonymous

+1 vote

1 answer 246 views

Suppose X is N(10, 1). Find (i) P[X > 10.5], (ii) P[9.5 < X < 11], (iii) x such that P[X < x] = 0.95. You will need to use Standard Normal tables?

answered Aug 30, 2021 in Maths & Statistics by anonymous

+1 vote

1 answer 267 views

Given that 0.04% of vehicles break down when driving through a certain tunnel find the probability of (a) no (b) at least two breakdowns in an hour when 2,000 vehicles enter the tunnel?

answered Aug 30, 2021 in Maths & Statistics by anonymous

+2 votes

2 answers 310 views

What is data cleaning and data tranformation

answered Aug 28, 2021 in Maths & Statistics by anonymous

+1 vote

1 answer 168 views

Find the probability of selecting either a heart or a face card from a 52 card deck?

answered Aug 27, 2021 in Maths & Statistics by anonymous

+2 votes

1 answer 519 views

Suppose a coin is flipped 3 times. What is the probability of getting two tails and one head?

answered Aug 27, 2021 in Maths & Statistics by anonymous

+1 vote

1 answer 166 views

Suppose we draw a card from a deck of playing cards. What is the probability that we draw a spade?

answered Aug 27, 2021 in Maths & Statistics by anonymous

0 votes

0 answers 112 views

Explain binomial theorem . Write down the binomial theorem for positive integral index and rational index ?

asked Aug 27, 2021 in Maths & Statistics by anonymous

+1 vote

1 answer 212 views

Suppose X is N(−1, 4). Find (a) P(X < 0); (b) P(X > 1); (c) P(−2 < X < 3); (d) P(|X + 1| < 1).

answered Aug 27, 2021 in Maths & Statistics by anonymous

+1 vote

1 answer 159 views

Suppose X is N(µ, σ2 ). For a = 1, 2, 3 find P(|X − µ| < aσ).

answered Aug 27, 2021 in Maths & Statistics by anonymous

+1 vote

1 answer 356 views

Three babies are given a weekly health check at a clinic, and then returned randomly to their mothers. What is the probability that at least one baby goes to the right mother?

answered Aug 27, 2021 in Maths & Statistics by anonymous

+1 vote

1 answer 341 views

During data presentation there are three key issues to consider. Explain the relevance of each of these three issues stating an application for each in the engineering field.

answered Aug 25, 2021 in Maths & Statistics by (user.guest)

+1 vote

1 answer 251 views

Expain hopital data management Generation and sources

answered Aug 25, 2021 in Maths & Statistics by (user.guest)

+1 vote

1 answer 888 views

A fair coin is flipped three times. Let S be the sample space of the eight possible outcomes, and let X be the random variable that assigns to an outcome the number of heads in this outcome. What is the expected value of X?

answered Aug 23, 2021 in Maths & Statistics by (user.guest)

+1 vote

1 answer 672 views

Suppose a book-shelf has 6 mathematics texts, 3 physics texts, 4 chemistry texts, and 5 computer science texts. Find the number n of ways a student can choose: a) one of the texts. b) one of each type of text.

answered Feb 27, 2021 in Maths & Statistics by anonymous

0 votes

0 answers 385 views

Suppose you wish to prove that the following is true for all positive integers nby using the Principle of Mathematical Induction: 1 + 3 + 5 + ... + (2n -1) =n2(a) Write P(1)

asked Dec 22, 2020 in Maths & Statistics by anonymous

0 votes

0 answers 142 views

Find the Eulerian number, (n k ) where n = 6 &k =2. List down the rows of permutation

asked Nov 29, 2020 in Maths & Statistics by (user.guest)

0 votes

1 answer 677 views

Sketch and label the even and odd components of the signals shown in Fig. 1-24. Using Eqs. (1.5) and (1.6), the even and odd components of the signals shown in Fig. 1-24 are sketched in Fig. 1-25.

answered Oct 28, 2020 in Maths & Statistics by (user.guest)

0 votes

0 answers 208 views

A constant volume batch reactor undergoes the series reaction

asked Oct 8, 2020 in Maths & Statistics by (user.guest)

0 votes

0 answers 206 views

For laminar flow in a tube with a constant wall heat flux, it can be shown that the microscopic energy equation can be reduced to the following form where qy is the heat flux in the y direction

asked Oct 8, 2020 in Maths & Statistics by (user.guest)

+1 vote

1 answer 941 views

The porous catalyst pellet shown in Figure 1 has an overall radius R and a thermal conductivity k (which may be assumed constant).

answered Oct 8, 2020 in Maths & Statistics by (user.guest)

0 votes

0 answers 175 views

A soluble gaseous reactant (specie A) dissolves into a deep liquid film where it undergoes the following second-order, irreversible reaction

asked Oct 8, 2020 in Maths & Statistics by (user.guest)

+2 votes

1 answer 4.3k views

The population of a certain country is known to increase at a rate proportional to the number of people presently living in the country.

answered Sep 18, 2020 in Maths & Statistics by (user.guest)

+2 votes

1 answer 1.3k views

Estimate Pearson’s First Coefficient of skewness for the given the data: 84 38 76 70 84 59 82 76 74 52 76 85 76 91 62 54 72 76.

answered Aug 30, 2020 in Maths & Statistics by (user.guest)

0 votes

0 answers 156 views

Discuss two major differences between Experimental Design Analysis and Classical Methods of analysis.

asked Aug 28, 2020 in Maths & Statistics by anonymous

+1 vote

0 answers 197 views

Use the trial control limits from part (a) to identify out of control points. If necessary, revise your control limits, assuming that any samples that plot outside the control limits can be eliminated

asked Aug 28, 2020 in Maths & Statistics by anonymous

+1 vote

1 answer 407 views

Based on your model estimate the probability that 3 people will infected in the next two days.

answered Aug 26, 2020 in Maths & Statistics by anonymous

+3 votes

1 answer 442 views

A process X is a normally distributed population with mean = 14 and variance 16. Determine the probability that 14 objects selected will have mean is greater than 15.2.

answered Aug 26, 2020 in Maths & Statistics by (user.guest)