,, 60. A professor of statistics in Southern University wants to determine wheth
ID: 3317962 • Letter: #
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60. A professor of statistics in Southern University wants to determine whether the average starting salaries amoog graduates of the 15 universities in Louisiana are equal. A sample of 25 recent graduutes from each university was randomly taken. The appropriate critical value for the ANOV A test is obtained from the F-distribution with degrees of freedom is equal to A). 15 and 25 B). 14 and 360 C). 360 and 14 D). 15 and 360 E. 25 and 10 61. A randomized block design with 4 treatments without replicates and 5 blocks produced the following surn of squares values: Total SS 1951 , SST 349, SSE 88, The value of F for treatments mest be A). 16.3 B). 1.34 C). 115 D)- 8.34 E·13 62. In a regression problem the folowing pairs of (x y) are given: (1, 1) (-L.-1).(0,0). (2, 2) and (3, 3) That indicates thar: A). the corrclation coefficient is -1 B) the corelation coefticiens-is 0 C)·the correlation coefficient is 1 D), the coefficient of deternimalion is between-2 and 2 E). pope of these 63. Given the least squares regressioa line y 463+ L38r, and a cotrelation of determination of 0.90, the coefficient deterinination mast be: A. 095 B) +095 D). 0.81 E. -0.81 4. In a regnession model involving 40 observations, the following estimated megnessine model was obtained:13.5+41, + 6 2, +5 Ett Fortis mde the following statistics are given: SSR-501 and SSE-99. The, the cvefficient of determination is: A) 0.198 B L00 0.835 Di 167 E). 0.914 65. In a chi-square arodress of- fit test with 5 degrees of freedom and a significaence level of D.I.5, the chisquare value from the tables 17es, which of the fallovwing computed values of the chl-square test statistic wil lead torejection of the null hypothesis?Explanation / Answer
Ans:
60)
numbet of treatments=15
df(treatments)=15-1=14
N=15*25=375
df(error)=375-15=360
Option B is correct.
62)orrelation cofficient,r=1
Option C is correct.
63)cofficient of determination,r^2=0.9^2=0.81
Option D is correct.
64)Cofficient of determination,R^2=SSR/SST=501/(501+99)=501/600=0.835
Option C is correct.
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