شرح احصاء اعمال ch 13 ,14,17

[SHOSHO:)]

chapter 14

1
In a multiple regression equation there are
A) Two or more dependent variable.
B) Two or more independent variables.
C) Two or more intercept values.
D) Multiple coefficients of determination

2
A dummy variable or indicator variable
A) May assume only a value of 0 or 1.
B) Is another term for the dependent variable.
C) Is found by .
D) Is equal to

3
The multiple standard error of estimate is
A) Found by taking the square root of SSR/SS total.
B) Negative when one of the net regression coefficients is 0.
C) Based on the term .
D) The same as the variance of a normal distribution.

4
In the ANOVA table, the value of k is the
A) Sum of squares total.
B) Total number of observations
C) Number of degrees of freedom.
D) Number of independent variables.

5
A correlation matrix shows the following:
A) All simple coefficients of correlation.
B) All possible net regression coefficients.
C) Correlations that are positive.
D) The multiple regression equation.

6
The following statement is true for a multiple regression equation:
A) There is only one dependent variable.
B) The R2 term must be at least .50.
C) All the regression coefficient must be between -1.00 and 1.00.
D) There is only one (Y — Ÿ).

7
Multicollinearity occurs when the following condition exists:
A) The residuals are correlated.
B) Time is involved in the analysis
C) The independent variables are correlated.
D) The residuals are not constant for all Y' values.

8
For a multiple regression analysis, the global hypothesis test determines
A) Which independent variables do not equal 0.
B) Whether any of independent variables differ from 0.
C) Whether any of the correlation coefficients differ from 0.
D) Whether the intercept differs from 0.

9
In testing the significance of individual regression coefficients
A) The test statistic is the t distribution.
B) We test the independent variables in pairs.
C) We usually delete the variables where the null hypothesis is rejected.
D) Regression coefficients with a negative coefficient are deleted from the equation.

10
A residual
A) Has the same degrees of freedom as the MSE term.
B) Cannot assume a negative value.
C) Is also called the correlation matrix.
D) Is the difference between the actual and the predicted value of the dependent variable.

1-b
2-b
3-c
4-d
5-a
6-a
7-c
8-b
9-a
10-d

[SHOSHO:)]

chapter 17

1
To conduct a nonparametric test,
A) The population must follow the normal distribution.
B) The standard deviation must be known.
C) It is not necessary to make any assumption about the shape of the population.
D) The data must be at least interval scale.

2
Which of the following is not a characteristic of the X2 distribution?
A) Its shape is based on the sample size.
B) The X2 statistic is always greater than or equal to zero.
C) It is positively skewed.
D) It approaches a normal distribution as the degrees of freedom increase.

3
In a goodness-of-fit test where the sample size is 200, there are 5 categories, and the significance level is .05. The critical value of X2 is
A) 9.488
B) 11.070
C) 43.773
D) 195.000

4
A goodness-of-fit test requires that
A) All the cell frequencies must be the same.
B) There must be at least 30 observations.
C) Forty percent of the cells must contain at least 10 observations.
D) In general, expected cell frequencies should be 5 or more.

5
Which statement best describes a contingency table?
A) Must have equal numbers of rows and columns.
B) Summarizes one variable that is classified according to two criteria.
C) Requires at least 10 observations in each cell.
D) Summarizes the frequencies of two variables.

6
In a contingency table a sample of 400 people is classified by gender and hair color (4 groups: blond, brown, black, and red). How many degrees of freedom are there?
A) 1
B) 3
C) 8
D) 399

7
Which statement is true for a X2 goodness-of-fit test?
A) There is only one degree of freedom.
B) The rejection region is in the upper right tail.
C) The scale of measurement is interval.
D) We must assume a normal population.

8
To find the expected frequency in a contingency table, do the following:
A) Compute the square root of the degrees of freedom.
B) Multiple the row total by the column total and divide the result by the grand total.
C) Subtract one from the total number of observations.
D) Divide the total number of observations by the number of cells in the table.

9
A researcher collects a random sample of 120 observations to study a demographic variable that is classified into 6 categories. We wish to investigate whether the number of observations is the same in each of the categories for the population. Which test is this?
A) This is a X2 test with 5 degrees of freedom.
B) This is a X2 test with 97 degrees of freedom.
C) This is a X2 test with 3 degrees of freedom.
D) This is a student's t test with 5 degrees of freedom.

10
Under what conditions could the X2 distribution assume negative values?
A) When the sample size is small.
B) When the cell frequencies are all equal.
C) When the degrees of freedom is 1.
D) Never

1-c
2-a
3-a
4-d
5-d
6-b
7-b
8-b
9-a
10-d




ملاحظة : بعض الاسئله تشمل جزئيات ماهي معانا

good luck all

[girl.k.s.a]

رآح أحط لكم إجآبآت الكويز التالت الي أنا حليتها

1- A
2- أتوقع C
3- B لانو معامل التحديد هو تربيع معامل الارتباط طلع الناتج قريب مو نفسو مرآ .
4- حليتو عادي نفس المسألة وبدل X حطيت 3 طلع ناتج مو موجود .
5-D صـ467 في نص الكلام مكتوب بس مدري صح والا لا .
6-B زي ما قالت سلطانه لو زادت الـ X تزيد الـ b وهنا الـ20 هيا الـ b والله أعلم .
7- نفس السؤال وبالأرقام في الموقع الي أعطيتكم هوا الجوآب كآن A .
8- C نفس الحل الي في الموقع .
9- A
10- B
11- D
12- محذوف
13- محذوف
14- B لانو الأول سالب نفس السؤال الي فوق .

هآدي أسئلة شآبتر 13 ..
للأسف مافي أسئلة على شآبتر 17 بس هوا سهل ما يحتاج له شي كولها صفحتين ..

وشآبتر 14 لسآ ما ذآكرتو =(
لو ذآكرتو رآح أنزل لكم الاجابات ,,

بس لا تعتمدوا عليها الي عندها إجابة تنزلها لانو أنا مو متأكدهـ من الحلول
ما عدآ من سؤال 7 - 14 أكيد الحل صحيح لانه منقووول ’’

[girl.k.s.a]

شوشو يا قمر أتمنى تكتبي للبنآت كعلى الأسئلة رقم الشآبترز عشآن ما يلخبطوا

ومشكوووووووووووورهـ ما قصرتي ’’

بس أبغى أعرف الإجآبآت أكيد صحيحه والا من حلولك ؟

ويعطيك ألف عاااااااافيه ’’

[•♥fŗŌồtą]

بنات حابه اسئلكم الحين الكويز الاول الثاني مضمونه الاجابات

يعني متاكدين من الحل :<

وسؤال مين حلها ^^

[SHOSHO:)]

المشاركة الأصلية كتبت بواسطة girl.k.s.a شوشو يا قمر أتمنى تكتبي للبنآت كعلى الأسئلة رقم الشآبترز عشآن ما يلخبطوا ومشكوووووووووووورهـ ما قصرتي ’’ بس أبغى أعرف الإجآبآت أكيد صحيحه والا من حلولك ؟ ويعطيك ألف عاااااااافيه ’’

تم التعديييل
و الاجابات اكيد صحيحه

[SHOSHO:)]

قيرل قدرت احمل الملفات من الموقع الي حطيتيه

ونزلتها لكم في المرفقات

للاسف مو كل الشباتر موجوده =(

[SHOSHO:)]

^
^
^
^

[girl.k.s.a]

المشاركة الأصلية كتبت بواسطة shosho:) chapter 13 7 which of the following is not a necessary condition for regression analysis? A) the standard deviation of each of the conditional distributions must be the same. B) the y values are independent. C) for each x value, there is a group of y values and these y values are normally distributed. D) the slope of the regression line is positive (increasing). بنوتات ليش 7 جوآبه d ؟؟؟ 1-c 2-b 3-a 4-c 5-c 6-a 7-d 8-c 9-a 10-b

^^

أتمنى أحد يفيدني ..

[girl.k.s.a]

شوشو جزآك الله ألف خيييييييييييييييييير ’’

مشكوووورهـ ما تقصري ,,