Question

In: Statistics and Probability

1. Which of the following symbols is used to reflect Goodman and Kruskal's gamma? a. r2...

1. Which of the following symbols is used to reflect Goodman and Kruskal's gamma?

a. r²

b. Y

c. β

d. Ø

e. λ

2. Briefly explain how an analyst should interpret the r² value in a regression analysis.

3. Explain how a researcher should interpret a correlation coefficient.

4. When the number of discordant pairs and concordant pairs in a P-Q relationship is equal, the interpretation is that the variables _____.

a. are perfectly correlated

b. have a weak but significant relationship

c. are normally distributed

d. have no relationship

e. have a negative association

5. Which of the following is true of relationships among nominal measures?

a. when there is no relationship at all, the coefficient should be 1.

b. when there is no relationship at all, the coefficient should be 0.

c. When there is complete dependency, the coefficient should be negative.

d. When there is complete dependency, the coefficient should be positive

e. none are correct

Expert Solution

Ans1;- (b) Y

Ans2:- The r2 is the coefficient of determination and it refers to the amount of common variance in two variables in a regression equation. Consequently, it allows the analyst to assess how much of a variable (the dependent variable) can be explained by the variables in the equation (the independent variables.

Ans3:-To interpret a correlation coefficient, one will address three pieces of information. First, is the relationship significant? If the significance level (p value) is less than the alpha level (typically .05), then the relationship is significant and the researcher will reject the null hypothesis. This means that the relationship is real and is not occurring simply by chance. Second, the researcher will assess the magnitude of the correlation coefficient. A correlation coefficient can range from -1 to +1. The closer to 1 (either positive or negative), the stronger the relationship is. Third, the researcher will evaluate the direction of the relationship by observing the sign of the correlation coefficient. If the sign is positive, then the relationship is positive. A positive relationship means that the variables covary together. If the sign is negative, then the relationship is inverse. This means that the variables covary in opposite directions.

Ans4:- (d) have no relanationship

Ans5:- (e) none are correct

orchestra answered 2 years ago

(3) Consider the linear map ? : R2 → R2 which sends (1, 0) ↦→ (−3,...

(3) Consider the linear map ? : R2 → R2 which sends (1, 0) ↦→ (−3, 5) and (0, 1) ↦→ (4, −1). (a) What is the matrix of the transformation? What is the change of coordinates matrix? Do they agree? How come? (b) Where does this transformation send the area between the vector (4, 2) and the x-axis? Explain algebraically and draw a picture. (c) What is the image of the lower half plane under ?? Explain algebraically and...

Which of the following statements regarding Lewis dot symbols of ions is false? Which of the...

Which of the following statements regarding Lewis dot symbols of ions is false? Which of the following statements regarding Lewis dot symbols of ions is false? Mg2+ always has one electron around it. In ionic compounds containing chloride, ions, Cl− is isoelectronic with Ar. In magnesium sulfide, S2− has eight electrons. In sodium chloride, Na+ has no electrons around it.

The following information is available for the Goodman Company: Goodman Company Balance Sheet December 31, 2018...

The following information is available for the Goodman Company: Goodman Company Balance Sheet December 31, 2018 ASSETS Current Year Prior Year Cash $125,000 $100,000 Accounts Receivable 515,000 500,000 Allowance for Doubtful Accounts (70,150) (60,000) Inventory 660,000 500,000 Prepaid Expenses 80,000 72,000 Equipment 892,000 900,000 Less: Accumulated Depreciation (460,000) (452,500) LIABILITIES Accounts Payable 430,000 370,000 Accrued Expenses 250,000 230,000 Income Tax Payable 58,000 50,000 Goodman Company Income Statement For Year Ending December...

March 1, 2017, Goodman Co. began the manufacture of a new device known as “X”. Goodman...

March 1, 2017, Goodman Co. began the manufacture of a new device known as “X”. Goodman installed a standard costing system in accounting for manufacturing costs of its product X. The standard costs for one unit of X are as follows: Raw materials: 6 lbs. @ $1 per lb.* ……………………. $6.00 Direct labor: 1 hour @ $4 per hour* …………………. 4.00 Overhead: 75% of direct labor costs ……………… 3.00 * According to the standard: - One unit of X requires...

Correlation(Part 1)-Week 11 -compute r,r2 and 1-r2 for the problem below .What does r,r2 and 1-r2...

Correlation(Part 1)-Week 11 -compute r,r2 and 1-r2 for the problem below .What does r,r2 and 1-r2 mean ? Is the correlation strong or weak ? You are given the following data: X(Independent Variable) Y(Dependent variable) Month Advertising Expenditure (in Millions of $) Sales Revenue (in Millions of $) July 1 3 August 2 7 September 3 5 October 4 11 November 5 14

Which of the following schools of thought views humans as responding to abstract meanings and symbols...

Which of the following schools of thought views humans as responding to abstract meanings and symbols as well as to concrete meanings? conflict functionalist interactionist consensus

Two reservoirs R 1 and R2, the level of each of which is controlled by a...

Two reservoirs R 1 and R2, the level of each of which is controlled by a detector of high level (a for R1, b for R2) and a low level detector (c for R1, d for R2). When these sensors detect the presence of the liquid they are at level 1. There are three LEDs V1, V2, V3, which operate under the following conditions: V1 = 1 if both tanks are full. V2 = 1 if both tanks are...

What symbols were used in Sherman Alexis’s “Ghost Dance”?

Please explain all the steps! Let f : R2 → R2 be the affine transformation which...

Please explain all the steps! Let f : R2 → R2 be the affine transformation which reflects about the line x = 1, then rotates 90 degrees clockwise about the origin. Write f as a matrix M, and use it to calculate f(2, 2).

1. which of the following is not used to measure the efficiency with which a firm...

1. which of the following is not used to measure the efficiency with which a firm uses its assets? current ratio, asset turnover, inventory turnover ratio, Accounts Receivable turnover ratio 2. f a company has received a payment from the customer, then… a) it's cash account will be credited b) accounts receivable would be debited c) it's cash account will be debited d) The cash account debit's will see if the cash account credits 3. Projects with a negative net...