Corrections to Lab Manual
Page Correction
48

In the first box, second row, first column, the entry should read:  W=aX+bY+cZ
72

Parts i and ii at the top of the page need some notation clarification.

i.  Figure out the area to the left of the smaller value by:  0.5-(0.1/2)=0.5-0.05=0.45

ii. Figure out the area to the left of the larger value by adding 0.1 to the value calculated in i, above:  0.45+0.1=0.55.

80 The second box at the top of the page which summarizes the Central Limit Theorem for the Sample Proportion contains a typo in the formula for Standard Error.  Please add a ")" after 1-π under the square root sign.
82

Part iii. just above the boxed note shows the calculation of 2 t-scores, however the wrong standard deviation symbol is used.  In both cases of t-score calculation the symbol should be s not σ.  Additionally, the X's in the formulas should be X-bars.  Here are corrected formulas:      

84

In the first line of part C a, there is a typo:  The phrase should read, "If we randomly select . . ." not ". . . selection. . ." as it currently states.
94

In the very last line of the page, the Excel command to calculate the Margin of Error has insufficient parentheses.  It should read:  =ABS(NORMSINV(0.05/2))*SQRT((0.12)*(1-0.12)/100)=0.0637.  Please note that the answer given in the manual is the correct answer.
100 Step 4, first bullet: This should read, "Calculate the critical value(s)." 
103 Immediately below the diagram, the last sentence of the paragraph should begin, "But P(Z>Z'OBS)=blue area only, . . . "
106 Question # 5:  in Lab Manual the answer on page 144 for this question has the wrong sample size in it. Please note corrections below.

Critical Value Method . . . .
iii. =SQRT(0.2*0.8/600) = 0.01633 =0.25-0.2 = 0.05 Zobs=0.05/0.01633 = 3.061862
iv. Apply decision rule: If |Zobs|>1.881, reject the null, otherwise fail to reject. 3.061862>1.881, reject the null and conclude that the original belief is not substantiated.
p-value method . . . .
ii. p-value=2*(1-NORMSDIST(3.061)) = 0.002206
iii. p-value = 0.002206 < 0.06, therefore, reject the null and conclude that the original belief is not substantiated.
107

Question 2. The first line should read, "In an attempt to prove that each IU student attends no more than 3 parties each month, a . . ."
109 The last line of the first box is missing an ε .  The last line should read ". . . intercept, β1 . . . βk as the slope coefficients and ε  as a random error term."
143 Question 1. a. iv.: '". . . at the 3% level" ==> α = 0.03.'