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Nicole Morobi

Nicole M.

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How does resource scheduling tie to project priority?

Project Management: The Managerial Process (McGraw-Hill international editions: Management & organization series)

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1. Find \( \frac{d y}{d x} \) if \( y=\frac{\sqrt[4]{x^{3}} \sqrt{x^{2}+1}}{(3 x+2)^{5}} \) Solution: We take logarithms of both sides of the equation and use the

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2c. A deep drawing operation is to be performed on a sheet-metal blank that is \( 1 / 8 \) in thick. The height (inside dimension) of the cup \( =3.8 \) in and the diameter (inside dimension) \( =5.0 \mathrm{~mm} \). Assuming the punch radius \( =0 \), determine the starting diameter of the blank to finish the operation with no material left in the flange. Is the operation feasible (ignoring the fact that the punch radius is too small)? [10] Use surface area computation, assuming thickness t remains constant.

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14:35? 18 × \( \quad \) A hot upset-forging operation is performed in an open die. The initial diamete... homework.study.com (a) Calculate the final area of cross section of the cylindrical work. \[ \begin{aligned} A_{f} & =\frac{\pi}{4}\left(d_{a}\right)^{2} \\ A_{f} & =\frac{\pi}{4}(45 \mathrm{~mm})^{2} \\ A_{f} & =1.590 \times 10^{3} \mathrm{~mm}^{2} \end{aligned} \] Calculate the volume of the cylindrical work. \[ \begin{aligned} V & =\frac{\pi}{4}\left(d_{i}\right)^{2} \times h \\ V & =\frac{\pi}{4}(30 \mathrm{~mm})^{2} \times 50 \mathrm{~mm} \\ V & =35.342 \times 10^{3} \mathrm{~mm}^{3} \end{aligned} \] Calculate the final height of the cylindrical work. \[ \begin{aligned} V & =A_{f} \times h_{f} \\ 35.342 \times 10^{3} \mathrm{~mm}^{3} & =1.590 \times 10^{3} \mathrm{~mm}^{2} \times h_{f} \\ h_{f} & =22.227 \mathrm{~mm} \end{aligned} \] Thus, the final height is \( 22.227 \mathrm{~mm} \). (b) Calculate the maximum force required in the die work. \[ \begin{array}{l} F=Y_{f} \pi r^{2}\left(1+\frac{2 \mu}{3 h_{f}}\right) \\ F=Y_{f} \pi\left(\frac{d_{a}}{2}\right)^{2}\left(1+\frac{2 \mu}{3 h_{f}}\right) \\ F=90 \mathrm{MPa}\left(\frac{1 \mathrm{~N} / \mathrm{mm}^{2}}{1 \mathrm{Mpa}}\right) \times \pi\left(\frac{45 \mathrm{~mm}}{2}\right)^{2}\left(1+\frac{2 \times 0.40}{3 \times 22.227 \mathrm{~mm}}\right) \\ F=144.856 \times 10^{3} \mathrm{~N} \end{array} \] Thus, the maximum force is \( 144.856 \times 10^{3} \mathrm{~N} \). Help improve Study.com. Report an Error

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\( 13: 47 \) \% Assignment 22023 Paper MANMIB1[83] - Saved nicolemorobi@gmail.com N File Home Insert Draw Layout Review View Arial 11 B \( I \) \( \underline{U} \) \( a b \) A Clear Formatting \( \mathrm{X}_{2} \) More Formatting \( \overline{\bar{\equiv}} \nabla \) 1 1c. A screen with 325 mesh count has wires with a diameter of 0.001377 in. Determine (a) the maximum particle size that will pass through the wire mesh and (b) the proportion of open space in the screen. [6] QUESTION 2 [35] 2a. With the aid of sketches explain and differentiate the five (5) rolling mills. [10]

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Ivan Kochetkov verified

Numerade educator

C. Standard error = 0.012 D. Margin of error = 0.141 9. Question 9 (3 marks) A market research survey of 25 households found that the average number of hours of television viewing per household is 7.25 hours per day with a variance of 4.84 hours. Ten years ago, the average number of hours of television viewing per household was reported to be 6.7 hours. Hours of television viewing is assumed to be normally distributed. For each one of the following questions, select the correct answer from the list below. a. 9.1 (1 mark) If the researcher wants to test if there is an increase, on average, in the number of hours of television viewing per household, identify the type of the hypothesis test. = One-sided test to the right b. 9.2 (1 mark) If the population variance is known to be 4, calculate the test statistic (to 3 decimal places). c. 9.3 (1 mark) If the population variance is unknown, calculate the test statistic (to 3 decimal places).

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Sanchit Jain verified

Numerade educator

c. 4.3 (1 mark) If X ~ N(20, 16), then the standardise value of x = 26 is a positive z-score. What is the value of z? Only give the numerical answer to 1 decimal place. Do not include the sign in your answer. z =

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Qudsiya Anis verified

Numerade educator

A researcher tested whether a low-calorie intake weight loss program will reduce arterial oxygen tension in patients with chronic hypercapneic respiratory failure. Arterial oxygen tension was measured before and after the weight loss program and the difference calculated as D = Before – After. The p-value for this test was found to be 0.062. Which one of the following statements is correct? A. The is an independent samples t-test B. The alternative hypothesis is H1: ?d < 0 C. There is insufficient evidence at the 5% level of significance to conclude that the weight loss program reduces arterial oxygen tension D. There is moderate evidence in favour of the null hypothesis

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Lucas Finney verified

Numerade educator

13. Questions 13 and 14 are based on the following scenario: A pharmaceutical company produces three brands of pain medication. They are interested if there is any difference in brand preference among consumers. To test this, they asked a random sample of consumers who have used all three brands in the past to indicate which of the brands they prefer. The data are as follows: egin{tabular}{|l|l|l|l|l|} hline Brand & 1 & 2 & 3 & Total \ hline Observed & 23 & 17 & 20 & 60 \ hline Expected & 20 & ( ? ) & a & \ hline( frac{left(f_{0}-f_{e} ight)^{2}}{f_{e}} ) & b & 0.45 & c & d \ hline end{tabular} Question 13 (4 marks) Find the missing values ( mathbf{a}, mathbf{b}, mathbf{c} ) and ( mathbf{d} ) in the table and select your answers from the list. a. ( a= ) b. ( b= ) c. ( mathrm{c}= ) d. ( d= )

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Robin Corrigan verified

Numerade educator

In a survey of 500 Internet users, 40 stated that they prefer MySpace. For the 95% confidence interval, which two of the following values are correct? A. Point estimate = 0.080 B. Critical value = 1.645 C. Standard error = 0.012 D. Margin of error = 0.141

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Aparna Shakti verified

Numerade educator

D. At least one proportion is different from the previous distribution 11. Question 11 (2 marks) Determine the critical value (to 3 decimal places) for testing the hypothesis at the 5% level of significance. Critical value = 12. Question 12(a) (3 marks) Find the missing value for A (correct to the nearest integer) and the missing values B and C (correct to 1 decimal place). A = B = C = 13. Question 12(b) (1 mark) The p-value for this hypothesis test is equal to 0.013. Indicate the strength of the evidence in favour of the alternative hypothesis. A. Very strong evidence B. Strong evidence C. Moderate evidence D. Weak/no evidence 13. Questions 13 and 14 are based on the following scenario: A pharmaceutical company produces three brands of pain medication. They are interested if there is any difference in brand preference among consumers. To test this, they asked a random sample of consumers who have used all three brands in the past to indicate which of the brands they prefer. The data are as follows: Brand | 1 | 2 | 3 | Total --- | --- | --- | --- | --- Observed | 23 | 17 | 20 | 60

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