Question

Data Science

1) The data in the excel file labeled “Decrease LDL" shows the result of administering anew drug to 20 subjects that were diagnosed as having very high LDL Cholesterol level. Dose, in mg, is the explanatory variable and decrease, shows the magnitude of the decrease for the dose shown for that subject, is the response variable.

a) (10 pts) Make a scatter plot of the data; do not include the regression line and/or equation.

b) (10 pts) What are your observations based on the scatter plot?

c) (10 pts) What is the regression, r? Comments?

d) (10 pts) Add the least squares regression line and r2 to your scatter plot.

e) (10 pts) What are your thoughts based on the least squares line and r??

f) (10 pts) If you administer a 25 mg dose what would you expect the decrease in LDL Cholesterol to be  Verified  ### Question 41127  Data Science

Given the start vertex s = a in the weighted directed graph below, use the following table to show the result of Dijkstra’s Algorithm (reference Section 8.4).(12 Points)

### Question 41126  Data Science

Briefly describe the two different ways to find a path given the start vertex and the end vertex in a graph. (6 Points)

### Question 41125  Data Science

Given a graph G=(V, E), what is its adjacent matrix and what is its incident matrix? (8Points)

### Question 41124  Data Science

Assume that an array has n elements. Prove that the complexity of the binary search isO(log. n). (10 Points)

### Question 41123  Data Science

Assume that an array has n elements. Prove that the complexity of the sequential search isO(n). (10 Points)

### Question 41122  Data Science

Assume that the elements in the integer array a are in ascending order. Complete the recursive binary search function below that returns the index of the target value t: (10Points)

### Question 41121  Data Science

a) What is a priority queue?A priority queue takes item's priority into account. When items in the queue are accessed, the item with the highest priority is accessed first.
. Answer the following questions: (12 Points)
b) What is a binary search tree?
c) What is a heap?

### Question 41120  Data Science

3. Complete the integer queue class defined below: (12 Points)

### Question 41119  Data Science

Complete the integer stack class defined below: (10 Points)

### Question 41118  Data Science

1. Assume that f(n) = 2n² + 3n +1. Figure out M, N>0, when n>N, |f(n)|<M|n²l, i.e.f(n)=O(n³). (10 Points)

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