DAA 2105 Lecture Notes - Lecture 5: Confidence Interval, Test Statistic

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ivoryminnow705

23 Jan 2021

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From (a) and (b) in this example we get different values of test statistic, d. f. and p- value but we conclude same result of these both test. please give me thumb up. > #a)by using two sample t- test > to test ho: mul=mu2 vs h1: mul not egqual to mu2 group1-c (48. 86, 50. 60,51. 02,47. 99,54. 20,50. 51. 13) groupl (1) 48. 86 50. 60 51. 02 47. 99 54. 20 50. 66 45. 91 48. 79 47. 76 51. 13 group2-c (48. 88,52. 63, 52. 55, 50. 94,53. 02,50. 66, 47. 78, 48. 44, 48. 92, 1. 148485 bample estimates: mean cf x mean ofy 49. 692 50. 545 p alpha=0. 05 > =decigion rule: if p-value >0. 05 (alpha), hence we accept ho, at 54 1. o. 3. =18, and p-value=0. 3824 ecnclusion:we conclude that there 13 no change in their means. > tb) by using paired t-test > to test ho: mud-0 v/s mud not equals to 0 > group1-c (48. 86,50. 60, 51. 02,47. 99, 54. 20, 50. 66, 45. 91, 48. 79, 47. 76, 51. 13) Group1 [1] 48. 86 50. 60 51. 02 47. 99 54. 20 50. 66 45. 91 48. 79 47. 76 51. 13 > group2-c(48. 88,52. 63,52. 55,50. 94,53. 02,50. 66,47. 78,48. 44, 48. 92,51. 63):

Related Questions

1. The escape speed Vis the minimum speed needed to project a mass m upward from thesurface of another
mass M (such as a planet, asteroid, or star). It is given byusing:

M = 1.99 Ã 10³⁰ kg ,

G= gravitational constant 6.67 x10^-11 N*m2/kg2

R = 6.96 Ã 10⁸m. is the radius of thesurface from the center of M

v=â2GM ====>>>>>> v= 6.1758 x10⁵ m/s

R
a) Suppose the Sun mysteriously begins to contract. What would bethe radius for which v escape fromthesurface equals the speed of light c? [This radius is known as theSchwarzschild radius. Anything thrown from that surface willeventually fall back on the surface. Interestingly Newtonâsuniversal gravitation and Einsteinâs general relativity predict thesame value fo the Schwarzschild radius.]

b) Find the Schwarzschild radius for Earthâs mass 5.97 Ã1024 kg.

Standards for Nonmanufacturing Expenses

CodeHead Software Inc. does software development. One importantactivity in software development is writing software code. Themanager of the WordPro Development Team determined that the averagesoftware programmer could write 25 lines of code in an hour. Theplan for the first week in May called for 4,650 lines of code to bewritten on the WordPro product. The WordPro Team has fiveprogrammers. Each programmer is hired from an employment firm thatrequires temporary employees to be hired for a minimum of a 40-hourweek. Programmers are paid $32.00 per hour. The manager offered abonus if the team could generate more lines for the week, withoutovertime. Due to a project emergency, the programmers wrote morecode in the first week of May than planned. The actual amount ofcode written in the first week of May was 5,650 lines, withoutovertime. As a result, the bonus caused the average programmer'shourly rate to increase to $40.00 per hour during the first week inMay.

Enter a favorable variance as a negative number using a minussign and an unfavorable variance as a positive number. If an amountis zero, enter "0" and choose "Not applicable" from thedropdown.

Required:

1. If the team generated 4,650 lines of codeaccording to the original plan, what would have been the labor timevariance?
$

2. What was the actual labor time variance as aresult of generating 5,650 lines of code?
$

3. What was the labor rate variance as a resultof the bonus?
$

4. Are there any performance-related issuesthat the labor time and rate variances fail to consider?

The labor rate and time variances the number of errors in thecode from programmer fatigue. A program that has will requiresignificant time for debugging at a later date. Thus, managers theefficiency of doing the work and also the quality of the work.

5. The manager is trying to determine if abetter decision would have been to hire a temporary programmer tomeet the higher programming demand in the first week of May, ratherthan paying out the bonus. If another employee was hired from theemployment firm, what would have been the labor time variance inthe first week?
$

6. Which decision is better, paying the bonusor hiring another programmer?

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DAA 2105 Lecture Notes - Lecture 5: Confidence Interval, Test Statistic

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