Answer:
We are given that The dependent variable is production; that is, it is assumed that different levels of production result from a different number of employees.
Number of Assemblers(x) One-Hour Production(y) (units)
2 11
4 18
1 7
5 29
3 20
a. Draw a scatter diagram.
Solution : Refer the attached figure
b. Based on the scatter diagram, does there appear to be any relationship between the number of assemblers and production? Explain.
Solution: The equation that shows the relationship between the number of assemblers and production is
Where y is One-Hour Production (units) and x is the Number of Assemblers
c.Compute the correlation coefficient.
Solution:
Formula of correlation coefficient:
x y xy
2 11 22 4 121
4 18 72 16 324
1 7 7 1 49
5 29 145 25 841
3 20 60 9 400
Sum: 15 85 306 55 1735
n=5
Substitute the values in the formula :
The correlation coefficient is 0.00351
Answer:
Use the inflection points to set up intervals. Substitute a value into each interval to find where the curve is concave up or down.
The graph is concave up
Answer:
c. Cluster sampling
Step-by-step explanation:
Cluster sampling is a kind of sampling whereby the entire population is divided into different groups(clusters) from which simple random samples are selected from these clusters to conduct the analysis. If possible, all the individual in the selected clusters are sampled.
For the case above, Christine samples the population by dividing the residents by towns(clusters) and randomly selecting 9 of the towns(9 selected clusters). The type of sampling used is Cluster sampling. Since it involves dividing the population into clusters, and sampling the selected clusters.
The sum of <em>299 </em>and <em>388 </em>is going to be <em>687</em>. =)
Answer:
D
Step-by-step explanation:
Substitute the x and y values of each answer option. If y is greater than or equal to half of x plus 10, the answer is correct.
In the last option, if you substitute the x value, -2, into 1/2x + 10, the result is 9. The y value is 11, which is greater than or equal to 9, so the last one is the correct answer.