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Mathematics Questions
Mathematics Questions
Mark wants to estimate the mean length of time (in minutes) all Middle School students spend reading online books. To determine this estimate, he took a random sample of 15 people and obtained the following results: 40, 110, 56, 20, 15, 10, 82, 60, 90, 11
Jacob wants to estimate the mean length of time (in minutes) all College students spend reading online journal articles. To determine this estimate, he took a random sample of 15 people and obtained the following results: 40, 110, 56, 20, 15, 10, 82, 60,
Based on a sample of 100 nurses, a 95% confidence interval is calculated for the mean annual salary (in pesos) for registered nurses in the United States. The interval is given below. What is the sample mean?
Partial Differential Equation using Separation of Variable
Find the Fourier series of f(x)
Find an estimate of the true mean time it takes to cook a two-pound Mcdonald's chicken. Round off the answer to two decimal places and show complete solutions.
Patty, a branch manager of a bank, would like a quick estimate of the mean checking account balance of all checking account customers. A random sample of checking 32 account balances results in a sample mean of $312,590.50 and a standard deviation of $52,
A factory produces a pack of peanuts. A researcher gets sample of 50 packs and computes the mean weight to be 57.2 grams. Based on a previous study, the population standard deviation is 0.15 grams. Round off all answers to two decimal places with complete
Determine the minimum sample size n needed to estimate μ given that the confidence level is 90%, the population standard deviation is 6.8, and the margin of error is 1.
What will happen to the width of a confidence interval if there is an increase in the: confidence level, sample size, and standard deviation?
A cylinder of length LL and density is floating in a large tank with water
In class, we considered a box with walls at x = 0 and x = L. Now consider a box with width L but centered at x = 0, so that it extends from x = L/2 to x = L/2 as shown in the figure.
Consider a potential well defined as U(x) = for x < 0, U(x) = 0 for 0 < x < L, and U(x) = U0 > 0 for x > L (see the following figure).
A particle moving in one dimension is described by the wave function ...
Payoff table and Minimum Cost Method
vertex
Sheridan Service sells oil at a markup of 41% of the selling price. Sheridan paid $0.96 per litre of oil.
Spring-Mass Problem
Mass-Spring Problem
Pulley Problem
Determine the energy of the particle if the proposed wave function satisfies the Schrödinger equation for x < 0.
Determine the function \psi(x).
Determine the constant N in terms of a
Calculate the minimum possible value of the energy E, and the value of x that gives this minimum E.
Algebra
Arrange the following in decreasing order if 0° < Φ < 45°.
Mathematics
The Bernoulli random variable takes values 0 and 1, and has probability function f(x) = (p^x) [(1 − p)^(1−x)]
Let X be a Poisson random variable with mean λ
Solve y(t)
Solve the following initial boundary value problem using Laplace transform.
The vibration of a semi-infinite string is described by the following initial boundary value problem.
Third order state space system
Let X equal the larger outcome when a pair of 6-sided dice are rolled.
Help with Pascal’s triangle and binomial coefficients
Let X be a discrete random variable with probability function f(x). Prove that E[a + b g(X) + c h(X)] = a + bE[g(X)] + cE[h(X))], where g and h are functions, and a, b and c are constants.
Let a random variable X have the p.f. f(x) = c(|x| + 1)2 for x = 0, ±1. Find the constant c so that f(x) is a valid probability function. Then, find E(X), E(X2 ) and var(X).
Let X be binomial with parameters n and p. Evaluate E{X(X − 1)} from first principles (i.e. the definition of expectation), and hence, derive var(X). You may assume linearity of expectation, and that E(X) = np.
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How to solve this simple way
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How to solve this simple way
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Let n be an integer. Use Definition 1.6 to explain why 2n + 7 is an odd integer.
Transform the following IBVP into a problem with homogeneous boundary conditions.
Solving IBVP using Eigenfunction Expansion
Graph the function
Fourier Series
Direct Variation
stimulation
Partial differentiation
probability and statistics
probability and statistics
According to Nielsen Media Research, the average number of hours of TV viewing per household per week in the United States is 50.4 hours. Suppose the standard deviation is 11.8 hours and a random sample of 42 U.S. households is taken. A. What is the prob
A stock pays a dividend of $60 at the end of the first quarter, with each subsequent quarterly dividend being 1% greater than the preceding one. Find the price of this stock using a yield rate of 6% compounded quarterly.
Question Stock XYZ paying annual dividends currently sells for $35.00 per share with the first dividend paid at time 1. The current dividend is $3.50 per share, and is expected to grow at a constant rate of 4%. What is the annual effective yield rate deem
A stock is expected to pay dividends of $15 one year from now and $20 two years from now. Assuming the value of a share today is $200, and the effective annual interest rate is 6%, what is the expected price two years from now?
Tumor counts: A cancer laboratory is estimating the rate of tumorigenesis in two strains of mice, A and B. They have tumor count data for 10 mice in strain A and 13 mice in strain B. Type A mice have been well studied, and information from other laborator
Tumor counts: A caTumor counts: A cancer laboratory is estimating the rate of tumorigenesis in two strains of mice, A and B. They have tumor count data for 10 mice in strain A and 13 mice in strain B. Type A mice have been well studied, and information fr
Find regular expressions for the languages accepted by the following automata.
A random sample of size n = 85 is taken from a finite population of size N = 479 with mean μ = 253 and variance σ2 = 436. [You may find it useful to reference the z table.] a-1. Is it necessary to apply the finite population correction factor? Yes No
civileengineering
Solve the following problems of Abu Kamil:
Based on the information below, choose the correct answers.
Tennis racket marked up 50% to $36.75. Whats the origanal price?
Mrs. Anderson had twice as many chickens as ducks
Use the point in the diagram to name the figure shown. then identify the type of figure
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