Question

In: Statistics and Probability

2. If the values of x in problem range from 2 to 25, should you use...

2. If the values of x in problem range from 2 to 25, should you use this model to predict the mean value of y when x =

a. 3 ?

b. -3 ?

c. 0 ?

d. 24 ?

3. Fitting a straight line to a set of data yields the following prediction line: Y = 16 - .05x

a. Interpret the meaning of y intercept, b0

b. Interpret the meaning of slope, b1

c. Predict the value for y when x = 6

4. How do you interpret a coefficient of determination, r2 = 0.80?

PREFERRABLY TYPED PLEASE. Easier for me to understand.

Expert Solution

Ans 2 ) If the values of x in problem range from 2 to 25, should you use this model to predict the mean value of y when x =

a. 3 yes because it is inside the range 2 to 25

b. -3 no because it is outside the range 2 to 25

c. 0 no because it is outside the range 2 to 25

d. 24 yes because it is inside the renge 2 to 25

Ans 3 ) a straight line is Y = 16 - .05x

a)meaning of y intercept, b0 is , when x = 0 the predicted value of y is 16

b.)meaning of b1: for every one unit increase in X , on average mean value of y decrease by 0.05

c.) the value for y when x = 6 is16 - .05*6=15.7

4. interpret of coefficient of determination, r2 = 0.80

about 80% variation in Y can be explained by the value of x in this model

PREFERRABLY TYPED PLEASE. Easier for me to understand.

orchestra answered 2 years ago

Use the Alternating Series Estimation Theorem to estimate the range of values of x for which...

Use the Alternating Series Estimation Theorem to estimate the range of values of x for which the given approximation is accurate to within the stated error. Check your answer graphically X^2

1) Find the domain and range of the rational function y( x) = x^2-25 / 2x^2...

1) Find the domain and range of the rational function y( x) = x^2-25 / 2x^2 + 13x+15 A) Factor the numerator and denominator B) Determine the point of discontinuity if it exists.

Linear regression question If the range of the x-values are from x=100 to x=150, why might...

Linear regression question If the range of the x-values are from x=100 to x=150, why might we be reluctant to use our data to perform a hypothesis test on β0?

. Answers for Z-values should be 2 decimals, probabilities should be 3 decimals, X-values 1 decimal....

. Answers for Z-values should be 2 decimals, probabilities should be 3 decimals, X-values 1 decimal. If σX = the standard deviation (SD) of X and µX = the mean of X, then: Z Formula 1: X to Z → Z0 = (X0 - µX) / σX Z Formula 2: Z to X → X0 = µX + (Z0 * σX) Given μX = 8.3, σX = 3.2 a) Find X0 such that prob(X0 < X < 10)...

Consider the iterative method below designed to sum a range of values from x to y....

Consider the iterative method below designed to sum a range of values from x to y. public static int fun(int x, int y) { int ans = 0; for(int i = x; i <= y; i++) ans = ans + i; return ans; } Which of the following recursive methods are algorithmically equivalent to the iterative method shown above: I. public static int fun(int x, int y) { if(x == y) return 0; else return x + (x + 1,...

Use the values provided to complete the questions below. a. What values are out of range?...

Use the values provided to complete the questions below. a. What values are out of range? b. Are they high or low? c. Which abnormal value concerns you the most? d. What nursing assessments must you perform because of this? e. What priority nursing intervention would you anticipate? Why? Test Value Glucose 83 BUN 14 Creatinine 0.7 Sodium 133 Potassium 6.1 Chloride 111 CO2 24

how do you find the range of the following equations y=(x^2+3x)/(x^2-4) (the range y can't equal...

how do you find the range of the following equations y=(x^2+3x)/(x^2-4) (the range y can't equal zero please explain how to get the answer because I assumed it's the coefficient of x^2 divided by x^2 which is one not zero) Question 2) find the range of y=(2x^2-5x-3)/(x^2-4x+3) (the range is y can't equal to 2 and 3.5, please explain why when 3.5 is the non permissible value) Question 3) find the range of y=(x^2-4)/(x^2-5x+6) (the range is y can't equal...

Problem 2 : If the slab is 25 ft wide x 50 ft long x 18...

Problem 2 : If the slab is 25 ft wide x 50 ft long x 18 inches deep with the total steel reinforcement of 15,000 ft of #5 bar. Find the quantity of concrete required (in cubic yards). The capacity of concrete truck is 9 cubic yards. Assume waste factor as 10%. Density of steel is 490 lbs/cubic feet. Problem 3 : If the slab is 75 ft wide x 100 ft long x 9 inches deep with the total...

Problem 2 Find the locations and values for the maximum and minimum of f (x, y)...

Problem 2 Find the locations and values for the maximum and minimum of f (x, y) = 3x^3 − 2x^2 + y^2 over the region given by x^2 + y^2 ≤ 1. and then over the region x^2 + 2y^2 ≤ 1. Use the outline: INSIDE Critical points inside the region. BOUNDARY For each part of the boundary you should have: • The function g(x, y) and ∇g • The equation ∇f = λ∇g • The set of three equations...

Problem 2 (25 %) Use multiple regression to estimate a model for the share of the...

Problem 2 (25 %) Use multiple regression to estimate a model for the share of the shadow economy of the form: SHADOWi = β0 + β1INCOMEi + β2UNABLEi + εi i = 1, …, 28 List the assumptions for the regression model, and explain the output provided by Excel. Provide a nice and easy to read output.  How is the R2 and the standard error calculated what is the interpretation?  What signs are found for the estimated coefficients...