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For the following population of N=10 scores
14,6,8,3,9,12,1,6
a) Sketch a histogram showing the population distribution
b) Locate value of the population mean in your sketch and make an estimate of the standard deviation
c) Compute sum of square (SS), variance, and standard deviation for the sample.
The following table shows the number of miles driven in each trial.
Students in the social work course received the following course grades. Create a frequency distribution for this data. Compute the mean. Determine the median.
Sample mean varies from population mean of 10 pounds at 5 percent level of significance using two-tailed test. Compute test statistic for the sample data.
Given that the mean of 100 observations is 42.5 and that their standard deviation is 6.313, find the sum of the squares of the observations.
Your friend tells you that the proportion of active Major League Baseball players who have a batting average greater than .300 is greater than 0.56, a claim you would like to test. The hypotheses for this test are Null Hypothesis: p ≤ 0.56, Altern..
To test the effectiveness of a new type of plastic handcuffs, a law enforcement agency puts the cuffs on a sample of 30 persons who belong to the local weightlifting club. None is capable to break free from the cuffs. What type of sampling techniq..
Index number acts as a barometer for measuring the value of money. What are the characteristics of an index number? State its utility.
Use a two proportion z-test to perform the required hypothesis test. State the conclusion.
If the pilot plant fails, Rob feels the chance of the full-scale facility succeeding is only 20%. The probability that the pilot plant will succeed is estimated at 0.6. Structure this problem with a decision tree and advise Rob what to do.
Estimate with 90% confidence the difference in the level of satisfaction with service between the two branches.
The first unit produced after the calibration effort to be found to be defective. What is the probability that machine is in adjustment?
Detremine the mean, standard deviation, and variance for this frequency distribution.
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