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Suppose the quarterly sales for a particular make of a car in Delhi were 2682, 2462
and 3012, respectively. From the past data prior to these three data points, a straight
line was to fit. The value on the line corresponding to the last observed time is 2988
and the slope is 80. Use exponential smoothing based upon the three observations
given above to forecast sales for the quarterly period following these observations,
using α = β = 0.2
3. A fitness center claims that its members lose an average of 15 pounds or more
the first month after joining the center. An independent agency that wanted to check
this claim took a sample of 45 members and found that they lost an average of 13
pounds within the first month with standard deviation of 3 pounds. What will your
decision be if a = 0.05?
An operations manager of a computer chip maker is in the process of selecting a new machine to replace several older ones. Although technological innovations have improved the production process, it is quite common for the machines to produce defective chips. The operations manager must choose between two machines. The cost of machine A is several thousand dollars greater than the cost of machine B. After an analysis of the costs it was determined that machine A is warranted provided that its defective rate is more than 2% less than that of machine B. To help decide both machines are used to produce 200 chips each. Each chip was examined and whether it was defective (code = 2) or not (code = 1) was recorded. Should the operations manager select machine A
A bucket contains 10 balls. 3 are red, 4 are blue and 3 are green? If you randomly choose 5 balls without replacing any of them, what is that probability that at least one is green?
The null hypothesis regarding a contingency table with 6 rows and 4 columns should be rejected (at 95% confidence) if the test statistic is greater than..
USE ONE SAMPLE Z TEST
The average baptismal cost includes 50 guest. A random sample of 32 baptismal during the past year in the National Capital Region had a mean of 53 guest and a standard deviation of 10. Is there sufficient evidence at the 0.05 level of significance that the average number of guest differs from the national average?
Given:
STEP 1: STATE THE HYPOTHESIS AND IDENTIFY THE CLAIM.
STEP 2: THE LEVEL OF SIGNIFICANCE
STEP 3: THE Z CRITICAL VALUE
STEP 4: COMPUTE THE ONE SAMPLE Z TEST VALUE
STEP 5: DECISION RULE
STEP 6: CONCLUSION
USE ONE SAMPLE Z TEST
A researcher reports that the average salary of College Deans is more than P63,000. A sample , test the claim that the College Deans earn more than P63,000 a month. The standard deviation of the population is P5,250.
Given:
STEP 1: STATE THE HYPOTHESIS AND IDENTIFY THE CLAIM.
STEP 2: THE LEVEL OF SIGNIFICANCE
STEP 3: THE Z CRITICAL VALUE
STEP 4: COMPUTE THE ONE SAMPLE Z TEST VALUE
STEP 5: DECISION RULE
STEP 6: CONCLUSION
USE ONE SAMPLE T TEST
One of the undersecretary of the Department of Labor and Employment (DOLE) claims that the average salary of civil engineer is P18,000. A sample of 19 civil engineers salary has a mean of
Given:
STEP 1: STATE THE HYPOTHESIS AND IDENTIFY THE CLAIM.
STEP 2: THE LEVEL OF SIGNIFICANCE
STEP 3: THE Z CRITICAL VALUE
STEP 4: COMPUTE THE ONE SAMPLE Z TEST VALUE
STEP 5: DECISION RULE
STEP 6: CONCLUSION
Data that can be classified according to grade (A, B, C, and D) are measured on what scale?
in the past lessons,you had collected real data set to be described using statistical values such as the type of the breakfast your relative have.using the same or similar dataset,formulate a problem which you will solve using the normal curve concept .discuss your procedure in doing this task
