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Estimating the simple aggregate price index.
Betts Electronics purchases three replacement parts for robotic machines used in their manufacturing process. Information on the price of the replacement parts and the quantity purchased is given below.
Part
Price
2000 2004
Quantity
RC-33
$0.50
$0.60
320
340
SM-14
$1.20
$0.90
110
130
WC50
$0.85
$1.00
230
250
Compute a simple aggregate price index for 2004. Use 2000 as the base period.
Assume the researcher's rats can be considered an SRS from the population of all laboratory rats. The mean Math SAT score of these students is found to be 560, 80 points higher than the national average.
Show the decision rule graphically. Use the .05 significance level.
We desire to test at 0.05 level of significance whether modification increases the life of battery. What is our decision rule? Reject null hypothesis if calculated t is less than 1.96.
Can we conclude that the mean time for a game is less than 3.50 hours? Use the .05 significance level.
X is a continuous random variable uniformly distributed on [20, 45] that is, the end points c = 20 and d = 45.
Utilizing the chart parameters developed above to define the control charts for future candy bar production, Compute the appropriate plotting points from the data.
Do students tend to improve their SAT Mathematics (SAT-M) score the second time they take the test? A random sample of four students who took the test twice received the following scores
Suppose that past data are not available for developing a planning value for p; therefore, you will use p = 0.050 for the planning average.
Be certain to mention the direction of the relationship, the strength of the relationship, and whether our findings are statistically significant
Find out the expected shape of distribution of sample mean?
Construct the following confidence intervals for your data set:
Suppose 1.5 percent of the antennas on new Nokia cell phones are defective. For a random sample of 200 antennas, find the probability that:
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