1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
daser333 [38]
3 years ago
13

Expiration dates that establish the shelf lives of pharmaceutical products are determined from stability data in drug formulatio

n studies. In order to measure the rate of decomposition of a particular drug, it is stored under various conditions of temperature, humidity, light intensity, etc., and assayed for intact drug potency at FDA-recommended time intervals of every three months during the first year. In this example, the assay Y (mg) of a certain 500 mg tablet formulation is determined at time X (months) under ambient storage conditions.
X 0 3 6 9 12
Y 500 490 470 430 350

(a) Graph these data points (xi , yi) in a scatterplot, and calculate the sample correlation coefficient r=Sxy/Sx.Sy. Classify the correlation as positive or negative, and as weak, moderate, or strong.
(b) Determine the equation of the least-squares regression line for these data points, and include a 95% confidence interval for the slope β1.
(c) Sketch a graph of this line on the same set of axes as part (a); also calculate and plot the fitted response values y, and the residuals ei= yi - ŷi, on this graph.
(d) Complete an ANOVA table for this linear regression, including the F-ratio and corresponding p-value.

Mathematics
1 answer:
dolphi86 [110]3 years ago
8 0

Answer:

(a) The correlation is positive

Step-by-step explanation:

You might be interested in
The ball followed a path modelled by the equation h = −0.001! + 0.5 + 2.5 where h is the height of the ball in feet and is the h
Mama L [17]

The heights the balls hit a fence at 350 ft distance are 65 feet, 38 feet and 30 feet, respectively

<h3>Represent the distance-height relationship for each player’s ball as an equation, in a table and on a graph. </h3>

<u>Juan</u>

Juan's equation is given as:

h = -0.001d^2 + 0.5d + 2.5

h =

Set d to multiples of 50 from 0 to 400.

So, the table of values of Juan's function is:

d (ft)                   h(ft)

0                          2.5

50                        25

100                      42.5

150                        55

200                      62.5

250                        65

300                      62.5

350                        65

400                      42.5

See attachment for the graph of Juan's function

<u>Mark</u>

A quadratic function is represented as:

h = ad^2 + bd + c

Using the values on the table of values, we have:

c = 3 -- the constant value

So, the equation becomes

h = ad^2 + bd + 3

Using the two other values on the table of values, we have:

23 = a(50)^2 + b(50) + 3

38 = a(100)^2 + b(100) + 3

Using a graphing tool, we have:

a = -0.001

b = 0.45

So, Mark's equation is h(d) = -0.001d^2 + 0.45d + 3

See attachment for Mark's graph.

<u>Barry</u>

From the graph, we have the table of values of Barry's function to be:

d (ft)                   h(ft)

0                          2.5

50                        21

100                      35

150                       44

200                      48

250                       46

300                      41

350                       30

400                      14

450                      0

Using a graphing tool, we have the quadratic function to be:

y = -0.001x^2 +0.4x +2.5

<h3><u>The shortest and the greatest distance before hitting the ground</u></h3>

From the graphs, equations and tables, the distance travelled by the balls are:

Juan = 505 feet

Mark = 457 feet

Barry = 450 feet

This means that Juan's ball would travel the greatest distance while Barry's ball would travel the shortest.

<h3>The height the balls hit a fence at 350 ft distance</h3>

To do this, we set d = 350

From the graphs, equations and tables, the height at 350 ft by the balls are:

Juan = 65 feet

Mark = 38 feet

Barry = 30 feet

The above represents the height the balls hit the fence

Read more about quadratic functions at:

brainly.com/question/12446886

#SPJ1

4 0
1 year ago
PLEASE HELP ASAP! BRAINLIEST!<br> Is this a function???<br> {(0,2),(1,4),(2,8),(3,16),(4,32),(5,64)}
Svetradugi [14.3K]

Answer:

yes

Step-by-step explanation:

it passes the verticle line test

the x-values only goto one y-value

4 0
2 years ago
The ratio of roses to carnations to daisies in
Leto [7]

Answer:

10

Step-by-step explanation:

10 10 10 1010 10 101 10 10 1o

4 0
2 years ago
What is the sum of natural numbers less than 200 neither divisible by 3 nor by 5
Sveta_85 [38]

Step-by-step explanation:

The required sum 

=(1+2+3+...+199)−(3+6+9+...+198)−(5+10+15+...+195)+(15+30+45+...+195)

=2199(1+199)−266(3+198)−239(5+195)+213(15+195)

 

=199×100−33×201−39×100+13×105=10732

8 0
2 years ago
Read 2 more answers
A circle had a circumference of 28.26 units what is the diameter of the circle
kolezko [41]

Answer:

9

Step-by-step explanation:

3.14 divided by 28.26 = 9

8 0
3 years ago
Other questions:
  • A circle has a diameter of 26 units. What is the area of the circle to the nearest hundredth of a square unit?
    6·2 answers
  • Plz help asap !!! markin brainiest !!!
    14·1 answer
  • Please help I don’t understand.... I will give brainliest to first and I will thank you!
    7·1 answer
  • Slope intercept of 3x-2y=-16
    7·1 answer
  • What is the probability of drawing a spade from a standard deck of cards on a second draw given that a spade was drawn on the fi
    10·1 answer
  • PLZ ANSWER <br><br> 1-2x = -X-3
    15·1 answer
  • Solve for x:<br> 4(1 – x) + 2 x = -3( x + 1)
    6·2 answers
  • What is the range of possible sizes for side x?
    5·2 answers
  • Help plss sorry for wasting ur time!!
    11·2 answers
  • This is worth 40 points so pls help! I need this ASAP.<br><br> I also need COMPLETE solution
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!