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MATH SOLVE
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On the basis of extensive tests, the yield point of a particular type of mild steel-reinforcing bar is known to be normally distributed with σ = 100. The composition of bars has been slightly modified, but the modification is not believed to have affected either the normality or the value of σ. (a) Assuming this to be the case, if a sample of 25 modified bars resulted in a sample average yield point of 8439 lb, compute a 90% CI for the true average yield point of the modified bar. (b) Compute a 92% CI for the true average yield using the sample data in (a).
General
2 months ago
A soft drink company fills two-liter bottles on several different lines of production equipment. The fill volumes are normally distributed with a mean of 1.97 liters and a variance of 0.04 (liter)2 (i.e. a standard deviation of 0.2 liter) a. Find the probability that a randomly selected two-liter bottle would contain between 1.95 and 2.03 liters. b. If X is the fill volume of a randomly selected two-liter bottle, find the value of x for which P(X > x) = 0.3228.
General
2 months ago
The yearly Penn rock-paper-scissors tournament has come down to the final series between Zach and Shaya. They play a best-of-thirteen games in rock-paper-scissors to determine the final winner; in other words, they play until one player has seven wins, and that player wins the tournament. Assume that no game ends in a tie and that Zach and Shaya are equally matched, i.e. for each game, they are both equally likely to win. What is the probability that the winner of the first game between Zach and Shaya wins the tournament?
General
2 months ago
Under the contribution income statement, a company's contribution margin will be: A. Higher if fixed SG&A costs decrease. B. Higher if variable SG&A costs increase. C. Lower if fixed manufacturing overhead costs decrease. D. Lower if variable manufacturing overhead costs increase.
General
2 months ago
A car manufacturer is concerned about poor customer satisfaction at one of its dealerships. The management decides to evaluate the satisfaction surveys of its next 40 customers. The dealer will be fined if the number of customers who report favorably is between 22 and 26. The dealership will be dissolved if fewer than 22 report favorably. It is known that 70% of the dealer�s customers report favorably on satisfaction surveys.a. What is the probability that the dealer will be finedb. What is the probability that the dealership will be dissolved?
General
2 months ago
A college financial adviser is interested in studying the number of students at his college who apply for loans when entering graduate school. Of the 721 students at the college, 299 of them apply for loans when entering graduate school. If the financial adviser conducts a study and samples 45 students at the college who are starting graduate school next fall, what is the probability that more than 16 of them apply for loans?
General
2 months ago
A company studying the productivity of its employees on a new information system was interested in determining if the age (X) of data entry operators influenced the number of completed entries made per hour (Y). The regression equation isA company studying the productivity of its employe = 14.374 - 0.145x. Suppose the actual completed entries per hour for an operator who is 35 years old was 8. The residual is2.6-2.2-3.51.3-1.3
General
2 months ago
A company that sells annuities must base the annual payout on the probability distribution of the length of life of the participants in the plan. Suppose the probability distribution of the lifetimes of the participants is approximately a normal distribution with a mean of 68 years and a standard deviation of 3.5 years (Show your workings clearly).a) What proportion of the plan recipients would receive payments beyond age 75?b) What proportion of the plan recipients die before they reach the standard retirement age of 65?c) Find the age at which payments have ceased for approximately 86% of the plan participants.
General
2 months ago
A company that relies on Internet-based advertising linked to key age demographics wants to understand the relationship between the amount it spends on this advertising and revenue (in S). Complete parts a through c below. a) Which variable is the explanatory or predictor variable? A. Since the company wants to predict advertising expenditure from revenue, the explanatory variable is revenue. O B Since the company wants to predict revenue rom advertising expenditure the e ana ory variable is evenue. ?C. Since he company wants o predic advertising expenditure rom revenue the explana or variable S dver ng expenditure. D. Since the company wants to predict revenue from advertising expenditure, the explanatory variable is advertising expenditure. b) Which variable is the response variable? A. Since the company wants to predict revenue from advertising expenditure, the response variable is advertising expenditure. B. Since the company wants to predict revenue from advertising expenditure, the response variable is revenue. ° C. Since the company wants to predict advertising expenditure from revenue, the response variable is revenue. 0 D. Since the company wants to predict advertising expenditure from revenue, the response variable is advertising expenditure. c) Which variable would you plot on the x-axis? OA. Since advertising expenditure is the response variable, it should be plotted on the x-axis. O B. Since revenue is the explanatory variable, it should be plotted on the x-axis. O C. Since advertising expenditure is the explanatory variable, it should be plotted on the x-axis. O D. Since revenue is the response variable, it should be plotted on the x-axis. Click to select your answer and then click Check Answer.
General
2 months ago
Kathy bicycles 8km/h faster than Dennis. In my he same time it takes Dennis to bicycle 36 km, Kathy can bicycle 60 km. How fast does each bicyclist travel
General
2 months ago
A rectangular pyramid is sliced so the cross section is perpendicular to its base but does not pass through its vertex.What is the shape of the cross section?squarerectangletrapezoidtriangleA sphere is sliced so that the cross section does not intersect the center of the sphere.What is the shape of the cross section?circlesemicirclesquarerectangleWhat is the area of a cross section that is parallel to face CDHG ?Enter your answer in the box. ( picture)What is the area of the two-dimensional cross section that is parallel to face ABC ?Enter your answer in the box. ( picture)This rectangular prism is intersected by a plane that contains points D, E, K, and L.What is the perimeter of the cross section?Enter your answer in the box. Round only your final answer to the nearest tenth. (picture)
General
2 months ago
Analyze the diagram below and complete the instructions that follow.Find the value of x and the value of y.A.x = 15, y = 10B.x = 20, y = 50C.x = 50, y = 10D.x = 50, y = 20Answer is C x=50 y=10
General
2 months ago
Are the functions linear or nonlinear? Column A Column B 1. 72 = x3 + y 2. y + 1 = 5(x – 9) 3. 7y + 2x = 12 4. 4y = 24 A. linear B. nonlinear
General
2 months ago
what is the slope intercept form of the linear equation 4x + 2y = 24 drag and drop the appropriate number, symbol, or variable to each box
General
2 months ago
Each week, Stephanie is paid a $180 base salary and a 3% commission on her total sales generated for the week. Which expression represents her weekly income when Stephanie generates w dollars in total sales? A180+0.03 wB 180+0.03+w C 180(0.03)wD 180(0.03)+w
General
2 months ago
1. Which representation does not show y as a function of x?A) Answer F B) Answer G C) Answer H D) Answer J2. Which set of ordered pairs represents y as a function of x?A) {(-9, 2), (0, 6), (1, -2), (-3, 6)} B) {(-1, 0), (4, 3), (-7, -3), (-1, -8)} C) {(3, 2), (-4, -2), (3, 1), (-4, 1)} D) {(5, 4), (2, 3), (1, 1), (2, 4)} the pic is for question 1
General
2 months ago
which has the greater volume: a 4 meter cube or a rectangular solid that that is 8 meters long, 2 meters wide and 2 meters high
General
2 months ago
Plot the line for the equation on the graph. y−2=−2(x+4)
General
2 months ago
What is 5 to the power of 2 +2 [73-(4x5)]
General
2 months ago
The slope-intercept form of the equation of a line that passes through point (–3, 8) is y = –x + 6. What is the point-slope form of the equation for this line?y – 3 = –(x + 8)y + 3 = –(x – 8)y + 8 = –(x – 3)y – 8 = –(x + 3)
General
2 months ago
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