The student will calculate and construct the line of best fit between two variables.
The student will evaluate the relationship between two variables to determine if that relationship is significant.
Collect the data
Use the most recent April issue of Consumer Reports. It will give the total fuel efficiency (in miles per gallon) and weight (in pounds) of new model cars with automatic transmissions. We will use this data to determine the relationship, if any, between the fuel efficiency of a car and its weight.
Using your random number generator, randomly select 20 cars from the list and record their
weights and fuel efficiency into
[link] .
Weight
Fuel Efficiency
Which variable should be the dependent variable and which should be the independent
variable? Why?
By hand, do a scatterplot of “weight” vs. “fuel efficiency”. Plot the points on graph paper.
Label both axes with words. Scale both axes accurately.
Analyze the data
Enter your data into your calculator or computer. Write the linear equation, rounding to 4 decimal places.
Calculate the following:
a = ______
b = ______
correlation = ______
n = ______
equation:
ŷ = ______
Obtain the graph of the regression line on your calculator. Sketch the regression line on the
same axes as your scatter plot.
Discussion questions
Is the correlation significant? Explain how you determined this in complete sentences.
Is the relationship a positive one or a negative one? Explain how you can tell and what
this means in terms of weight and fuel efficiency.
In one or two complete sentences, what is the practical interpretation of the slope of the least
squares line in terms of fuel efficiency and weight?
For a car that weighs 4,000 pounds, predict its fuel efficiency. Include units.
Can we predict the fuel efficiency of a car that weighs 10,000 pounds using the least
squares line? Explain why or why not.
Answer each question in complete sentences.
Does the line seem to fit the data? Why or why not?
What does the correlation imply about the relationship between fuel efficiency and
weight of a car? Is this what you expected?
Are there any outliers? If so, which point is an outlier?
Bacteria doesn't produce energy they are dependent upon their substrate in case of lack of nutrients they are able to make spores which helps them to sustain in harsh environments
_Adnan
But not all bacteria make spores, l mean Eukaryotic cells have Mitochondria which acts as powerhouse for them, since bacteria don't have it, what is the substitution for it?
Assimilatory nitrate reduction is a process that occurs in some microorganisms, such as bacteria and archaea, in which nitrate (NO3-) is reduced to nitrite (NO2-), and then further reduced to ammonia (NH3).
Elkana
This process is called assimilatory nitrate reduction because the nitrogen that is produced is incorporated in the cells of microorganisms where it can be used in the synthesis of amino acids and other nitrogen products
There are nothing like emergency disease but there are some common medical emergency which can occur simultaneously like Bleeding,heart attack,Breathing difficulties,severe pain heart stock.Hope you will get my point .Have a nice day ❣️
_Adnan
define infection ,prevention and control
Innocent
I think infection prevention and control is the avoidance of all things we do that gives out break of infections and promotion of health practices that promote life