Question

Calculating the mean and standard deviation for two classes the results were as follows. For class...

Calculating the mean and standard deviation for two classes the results were as follows. For class one the mean is 17.1 and the SD is 9.814. For class 2 the mean is 20.6 and the SD is 8.64. What do these results tell us?

Homework Answers

Answer #1

We are given

For class 1 , X1 bar = 17.1 , s1 = 9.814

For class 2 , X2 bar = 20.6 , S2 = 8.64

The coefficient of variation for class 1 =( S1/x1bar)*100

Coefficient of variation class 1 =( 9.814/17.1)*100 = 57.39 %

Coefficient of variation for class 2 = (S2/X2bar) *100

=(8.64/20.6)*100

Coefficient of variation class 2 = 41.94%

Coefficient of variation is less then data is consistent.

Here class 2 has low coefficient of variation than class 1 .

So class 2 is consistent than class 1

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
There are 2 classes. Afternoon class with mean = 70 and standard deviation is 15 Morning...
There are 2 classes. Afternoon class with mean = 70 and standard deviation is 15 Morning class with a mean = 70 and standard deviation of 5. The spread of grades in the morning class has less variation and located mostly around the mean.   According to emperical rule (assuming grades are normally distributed) it says, 68% of grades are falls within 1 standard deviation, 95% of grades falls within 2 standard deviation and 99.7% of grades falls within 3 standard...
a. For classes of 243 ​students, find the mean and standard deviation for the number born...
a. For classes of 243 ​students, find the mean and standard deviation for the number born on the 4th of July. Ignore leap years. b. For a class of 243 ​students, would two be an unusually high number who were born on the 4th of​ July?
Samples of quiz scores for two stats classes with different instructors provide the following results: Instructor...
Samples of quiz scores for two stats classes with different instructors provide the following results: Instructor A Mean: 78 Standard deviation: 10 Sample Size: 50 Instructor B Mean: 72 Standard Deviation: 8 Sample Size: 40 does the evidence suggest that average in Instructor A's class is higher than average in Instructor B's class? Test Allpha=.05. Construct a 95 percent confidence interval for the differences in averages.
QUESTION 22 The results from a statistics class' first exam are as follows: The mean grade...
QUESTION 22 The results from a statistics class' first exam are as follows: The mean grade obtained by its 25 students is 83, with a standard deviation of 11. The distribution of grades was unimodal and symmetrical. What percentage of individuals have a z-score between -1 and 1.40 QUESTION 23 Suppose you have a tree farm and you have 1000 live oaks on this farm. You are wondering if this would be a profitable time to harvest the tallest ones...
If a class of 40 had an average mean of 82 and a standard deviation of...
If a class of 40 had an average mean of 82 and a standard deviation of 4. The teacher wanted to compare to the nation with a pop. score of u=73. What would "t" value be, sig. level at .01, and interpretation of results?
A population is normally distributed with mean 17.1 and standard deviation 1.3. (a) Find the intervals...
A population is normally distributed with mean 17.1 and standard deviation 1.3. (a) Find the intervals representing one, two, and three standard deviations of the mean. one standard deviation      (smaller value) (larger value) two standard deviations      (smaller value) (larger value) three standard deviations      (smaller value) (larger value) (b) What percent of the data lies in each of the intervals in part (a)? (Round your answers to two decimal places.) one standard deviation      % two standard deviations      % three standard deviations    
Create a hypothetical example of 2 classes of 8 students’ scores out of 100, such that...
Create a hypothetical example of 2 classes of 8 students’ scores out of 100, such that 1 class has a higher SD and the other has a higher IQR. (Hint: IQR will not be effected by either the lowest or highest score but SD greatly will) Basically come up with two examples in which one class has a higher standard deviation and the other has a higher Interquile range.
You scored an 89 on a math test where the class mean and standard deviation are...
You scored an 89 on a math test where the class mean and standard deviation are 75 points and 7 points respectively. You scored a 65 on an English test where the mean and standard deviation are 53 points and 4 points, respectively. In which class did you do better? Explain your answer using Z-scores.
Lana is teaching a Stitistic class and an Intermediate Algebra class.She gives tests to both classes...
Lana is teaching a Stitistic class and an Intermediate Algebra class.She gives tests to both classes and a random sample of the test scores are below: STATS:75 ,80,85,83,85,65,65,70,67,80,70 ALGEBRA:45,83,75,95,105,55,67,53,97,89,61 a) Compute the mean and standard deviation for each one. b) Taken as group which class do you think understood the material better?Why?
Calculate the range, mean absolute deviation (MAD), and the standard deviation of the data. A summer...
Calculate the range, mean absolute deviation (MAD), and the standard deviation of the data. A summer class measured from tip of thumb to tip of pinky in inches. The results were: 6 6.25 7 7 7 7.25 7.25 7.5 7.5 7.5 7.5 7.75 8 9 Can these values be calculated if this were a qualitative (categorical) variable?
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT