Suppose X, is a numerical variable and X2 is a dummy variable with two categories and the regression equation for a sample of n= 18 is Y, = 3- 4X + 2X. a. Interpret the regression coefficient associated with variable X4. b. Interpret the regression coefficient associated with variable X2. c. Suppose that the teTAT test statistic for testing the contribution of variable X, is 1.16. At the 0.05 level of significance, is there evidence that variable X, makes a significant contribution to the model? a. Interpret the regression coefficient associated with variable X,. Holding constant the effect of v for each increase of one unit in v the predicted mean value of Y V by a positive change of unit(s). b. Interpret the regression coefficient associated with variable X Holding constant the value of V changing the value of v from to is estimated to predicted mean value of Y by a positive change of unit(s). c. Determine the null and alternative hypotheses. Ho H.: State the test statistic. ESTAT (Round to two decimal places as needed.) Find the p-value. p-value = (Round to three decimal places as needed.) State the conclusion. Choose the correct answer below. O A. Reject Hg. There is insufficient evidence at the 0.05 level of significance that variable X, makes a significant contribution to the model. O B. Do not reject Ho. There is sufficient evidence at the 0.05 level of significance that variable X, makes a significant contribution to the model. OC. Reject Hg. There sufficient evidence at the 0.05 level of significance that variable X, makes a significant contribution to the model. O D. Do not reject Ho. There is insufficient evidence at the 0.05 level of significance that variable X, makes a significant contribution to th model.

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Unitary Method

The word “unitary” comes from the word “unit”, which means a single and complete entity. In this method, we find the value of a unit product from the given number of products, and then we solve for the other number of products. 

Speed, Time, and Distance

Imagine you and 3 of your friends are planning to go to the playground at 6 in the evening. Your house is one mile away from the playground and one of your friends named Jim must start at 5 pm to reach the playground by walk. The other two friends are 3 miles away.

Profit and Loss

The amount earned or lost on the sale of one or more items is referred to as the profit or loss on that item.

Units and Measurements

Measurements and comparisons are the foundation of science and engineering. We, therefore, need rules that tell us how things are measured and compared. For these measurements and comparisons, we perform certain experiments, and we will need the experiments to set up the devices.