Mathematics problem solving
178175 questions • Page 110 / 3564
1) Determine which correlation coefficient indicates a stronger relation between
1) Determine which correlation coefficient indicates a stronger relation between variables: -0.28 and -0.31. a) -0.28 b) -0.31 c) same strength 2) The incidence of depression amon…
1) Develop a linear regression model to predict company revenue, using CPI as th
1) Develop a linear regression model to predict company revenue, using CPI as the only independent variable. 2) Develop a linear regression model to predict company revenue, using…
1) Develop a linear regression model to predict company revenue, using CPI as th
1) Develop a linear regression model to predict company revenue, using CPI as the only independent variable. 2) Develop a linear regression model to predict company revenue, using…
1) Discount Note: Julie borrowed $3650 from her bank for 18 months using a 7.6%
1) Discount Note: Julie borrowed $3650 from her bank for 18 months using a 7.6% discount note. How much did she pay for the use of the money? How much did she receive from the ban…
1) Discuss the importance of constructing confidence intervals for the populatio
1) Discuss the importance of constructing confidence intervals for the population mean by answering these questions. What are confidence intervals? What is a point estimate? What …
1) Discuss the importance of constructing confidence intervals for the populatio
1) Discuss the importance of constructing confidence intervals for the population mean by answering these questions. What are confidence intervals? What is a point estimate? What …
1) Does the following graph have an Euler circuit, an Euler path, both, or neith
1) Does the following graph have an Euler circuit, an Euler path, both, or neither? Give reasons for your decision. This problem is similar to examples 4 and 5 and problems 8.2.1–…
1) Dr. Muzak believes that students will learn most effectively with a constant
1) Dr. Muzak believes that students will learn most effectively with a constant background sound, as opposed to an unpredictable sound or no sound at all. She randomly assigns 30 …
1) During the period of time that a local university takes phone-in registration
1) During the period of time that a local university takes phone-in registrations, calls come in at the rate of one every two minutes. Can you please write what to type into Excel…
1) During the period of time that a local university takes phone-in registration
1) During the period of time that a local university takes phone-in registrations, calls come in at the rate of one every two minutes. Can you please write what to type into Excel…
1) Dynamic random-access memory (DRAM) memory chips are made from silicon wafers
1) Dynamic random-access memory (DRAM) memory chips are made from silicon wafers in manufacturing facilities through a very complex process called wafer fabs. The wafers are route…
1) Each person in a random sample of 900 city residents was asked if he or she s
1) Each person in a random sample of 900 city residents was asked if he or she supports having a skateboard park built in the city. The results are shown below. Support 47% Oppose…
1) Each test of a new type of plane can end in success (S) or failure (F). Consi
1) Each test of a new type of plane can end in success (S) or failure (F). Consider the outcomes of the sequential tests of three new planes. Let X represent the number of success…
1) Effect of rainfall on predators and prey: The population of lions, L, in Afri
1) Effect of rainfall on predators and prey: The population of lions, L, in Africa greatly depends on the population of their prey, P, which consists mainly of large mammals with …
1) Egbert charges a fixed rate plus an hourly rate to bill clients. It costs $10
1) Egbert charges a fixed rate plus an hourly rate to bill clients. It costs $100 for a job that is 3 hours of work. This is expressed as an ordered pair (3, 100). a) He charges $…
1) Estimate a simple linear regression model predicting Oil Usage from Degree Da
1) Estimate a simple linear regression model predicting Oil Usage from Degree Days. Is this model statistically significant? No Yes QUESTION 2 [2] How much of the variation in Oil…
1) Estimate the volume of the solid that lies below the surface z = x + 2y^2 and
1) Estimate the volume of the solid that lies below the surface z = x + 2y^2 and above the rectangle R = [0,3] * [0,4] with m = 3 and n = 2. Choose the sample points to be the low…
1) Ethical statistical practice is fundamentally based on which of the following
1) Ethical statistical practice is fundamentally based on which of the following: Interpretations that favor the researcher’s interests Results that were achieved by using the wro…
1) Euchre is a card game that uses a 24-card deck (which can be formed by removi
1) Euchre is a card game that uses a 24-card deck (which can be formed by removing all of the 2’s, 3’s, 4’s, 5’s, 6’s, 7’s, and 8’s from a standard 52-card deck) in which the play…
1) Evaluate Int 1/xlnx dx a) lnx+C b)lnx^x+C c)ln|lnx|+C d)xlnx+C e)e^lnx+C 2)Ch
1) Evaluate Int 1/xlnx dx a) lnx+C b)lnx^x+C c)ln|lnx|+C d)xlnx+C e)e^lnx+C 2)Choose integration rule you would use to perform the integration: Int. sec^2x / 1+tanx a) Power b) Se…
1) Evaluate the expression. Determine the number of combinations of 7 things tak
1) Evaluate the expression. Determine the number of combinations of 7 things taken 4 at a time. (4 points) 2) Solve the problem. Mark can remember only the first 4 digits of his f…
1) Evaluate the integrals; (a) \\(undefined\\) (b) \\(undefined\\) (c) \\(undefi
1) Evaluate the integrals; (a) (undefined) (b) (undefined) (c) (undefined) (d) (undefined) (e) (undefined) 2) Use a definite integral to find an expression that represents the are…
1) Evaluate the limit. (Use symbolic notation and fractions where needed.) 2) 3)
1) Evaluate the limit. (Use symbolic notation and fractions where needed.) 2) 3) Evaluate the limit. (Use symbolic notation and fractions where needed.) 4) 5) 6) Evaluate the limi…
1) Expected Value: Expected value indiscrete random variable is a kind of mean o
1) Expected Value: Expected value indiscrete random variable is a kind of mean or average. It includesall expectations like loss and gain. Formula: E(x) = ?[x * p(x)] = x a) …
1) Explain briefly what the Standard Errors is and how it can be used an analysi
1) Explain briefly what the Standard Errors is and how it can be used an analysis. Compare the Standard Errors (SE) of these two models: Model 1: Model 2: SUMMARY OUTPUT Regressio…
1) Explain each step Disease A occurs in 0.1% of the population. If a person doe
1) Explain each step Disease A occurs in 0.1% of the population. If a person does NOT have the disease and takes a test for the disease, the test correctly indicates that they don…
1) Factor: k2 - 4 a. (k-2) (k-2) b. (k2 + 4) (k2 - 4) c. (k+2) (k-2) d. (k+4)(k-
1) Factor: k2 - 4 a. (k-2) (k-2) b. (k2 + 4) (k2 - 4) c. (k+2) (k-2) d. (k+4)(k-4) e. None of the above 2) Solve for x: (5x - 10)/(x - 2) = (3x)/(x + 1) a. No Solution b. -5/2 c. …
1) Fill in the blank for concepts regarding sample distribution of a statistic.
1) Fill in the blank for concepts regarding sample distribution of a statistic. a) The sampling distribution of the sample mean tends to be a is large. b) The sampling distributio…
1) Find 95% confidence intervals for samples of size 10, 30, and 100. 2) Find 99
1) Find 95% confidence intervals for samples of size 10, 30, and 100. 2) Find 99% confidence intervals for the same samples used in problem 1. 3) Recall that the true population m…
1) Find a formula for the distance D between the point R(20.30) and the line ax
1) Find a formula for the distance D between the point R(20.30) and the line ax + by + c = 0 2) Explain why each of the following expressions makes no sense 3) Show that A(2,-1,1)…
1) Find a unique research article via the search Database EBSCOhost(http://libgu
1) Find a unique research article via the search Database EBSCOhost(http://libguides.pasadena.edu/c.php?g=126817&p=829696) using PCC's Shatford Library's(http://www.pasadena.e…
1) Find an equation of the plane consisting of all points that are equidistant f
1) Find an equation of the plane consisting of all points that are equidistant from (3, 3, 2) and (-1, -4, 5), and having -4 as the coefficient of x . 2)Suppose a line is given pa…
1) Find an equation of the plane consisting of all points that are equidistant f
1) Find an equation of the plane consisting of all points that are equidistant from (3, 3, 2) and (-1, -4, 5), and having -4 as the coefficient of x . 2) Find the distance from th…
1) Find an equation of the tangent line to the curve at the given point. y = x3
1) Find an equation of the tangent line to the curve at the given point. y = x3 2x + 2, (3, 23) 2)If the tangent line to y = f(x) at (5, 2) passes through the point (0, 1), find f…
1) Find another angle with 0
1) Find another angle with 0<<360 that has the same: Sine function value as 200 = ________degrees Cosine function value as 200200 = ________degrees 2)If cos=2/5 and tan<0…
1) Find the area of the given triangle. Round the area to the same number of sig
1) Find the area of the given triangle. Round the area to the same number of significant digits given for each of the given sides. A = 117°, b = 14, c = 19 ________ square units 2…
1) Find the center and radius of the circle given by the equation x^2+y^2-4x-6y+
1) Find the center and radius of the circle given by the equation x^2+y^2-4x-6y+12=0 he center is : (2,3) The radius is : ______ write in standard form (x-h)^2-(y-k)^2=r^2 The sam…
1) Find the correlation the data points with the following coordinates: let ?, j
1) Find the correlation the data points with the following coordinates: let ?, j Ship 2200 x| 29.2 13.7 35.7 239 38.3 1) equation of the least squares line The paired data below c…
1) Find the critical value(s) that would be used in a hypothesis test of the fol
1) Find the critical value(s) that would be used in a hypothesis test of the following claim. Claim: "The mean amount of beverage in a medium drink sold at this college's cafeteri…
1) Find the critical value(s) that would be used in a hypothesis test of the fol
1) Find the critical value(s) that would be used in a hypothesis test of the following claim. Claim: "The mean amount of beverage in a medium drink sold at this college's cafeteri…
1) Find the derivative of f(x) = ( x 3 + 5x 2 ) ( x 2 - 8x + 10 ). Section 2.4 A
1)Find the derivative of f(x) = ( x 3 + 5x 2 ) ( x 2 - 8x + 10 ). Section 2.4 A) 5x 4 + 12x 3 - 90x 2 + 100xB) 5x 4 - 12x 3 - 90x 2 + 100x C) 5x 4 - 12x 3 - 90x 2 - 100xD) 5x 4 - …
1) Find the derivative of the function. g ( w ) = 6 2)A rocket can rise to a hei
1) Find the derivative of the function. g(w) = 6 2)A rocket can rise to a height of h(t) = t3 + 0.1t2 feet in t seconds. Find its velocity and acceleration 12 seconds after it is …
1) Find the equation of a line passing through the points (1, 4) and (3, 10). An
1) Find the equation of a line passing through the points (1, 4) and (3, 10). Answer a) y = 3x + 1 b) y = 2x + 3 c) y = 4x - 1 d) y = 5x - 2 2) Find the equation of a line passing…
1) Find the equation of the tangent line to the curve y= 6sec(x)-12cos(x) at the
1) Find the equation of the tangent line to the curve y= 6sec(x)-12cos(x) at the point (pi/3,6). Write the answer in y=mx+b form (where m is slope and b is y intercept). 2) Find t…
1) Find the exact value of the expressin if possible. sin(2tan -1 (radical 5 / 2
1) Find the exact value of the expressin if possible. sin(2tan-1(radical 5 / 2) Quadrant for angle? 2) Solve triangle ABC if given a=35 degrees, b=75 degrees, and B=10 3) Find the…
1) Find the extreme values of f subject to both constraints. (If an answer does
1) Find the extreme values of f subject to both constraints. (If an answer does not exist, enter DNE.) f(x, y, z) = 3x - y - 3z; x + y - z = 0, x2 + 2z2 = 3 ----------------…
1) Find the following exact Binomial probabilities using the function Binomdist
1) Find the following exact Binomial probabilities using the function Binomdist and the approx. Normal probabilities using the function Normdist. P(x = 20), n = 120, p = .4 P(x &g…
1) Find the linearization L(x) of f(x) at x=a. f(x)=x+(1/x), a=3. A. L(x)=8/9x+1
1) Find the linearization L(x) of f(x) at x=a. f(x)=x+(1/x), a=3. A. L(x)=8/9x+1/2 B. L(x)=10/9x+1/2 C.L(x)=10/9x+2/3 D.L(x)=8/9x+2/3 2) A man 6 ft tall walks at a rate of 7ft/sec…
1) Find the margin of error in the 95% confidence interval for p that is calcula
1) Find the margin of error in the 95% confidence interval for p that is calculated from the sample statistics x = 207 and n = 300. 2) Use technology to find the critical value t/…
1) Find the margin of error in the 95% confidence interval for p that is calcula
1) Find the margin of error in the 95% confidence interval for p that is calculated from the sample statistics x = 207 and n = 300. 2) Use technology to find the critical value t/…
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