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4. The United States Golf Association requires that golf balls have a diameter that is 1.68 inches. An engineer for the USGA wishes to determine whether Maxfli XS golf balls have a mean diameter which is different from the 1.68. A random sample of 12 Maxfli XS golf balls was chosen. The mean diameter of the sample was 1.6809 with a standard deviation of 0.0044. Test the engineer's claim at the 5% level of significance. 1. State the Null Hypothesis and the Alternative Hypothesis 2. Determine the test statistic. 3. Determine the P-value 4. Make a decision regarding the hypotheses based on the P-value and the Level of Significance.
One bolt produced at this factory is randomly choosen and is found to be defective. what is the probability that it was produced by machine B?
Suppose that 46 percent of families living in a certain country own a car and 18 percent own an SUV. The Addition Rule might suggest, then, that 64 percent of families own either a car or an SUV. What's wrong with that reasoning.
If this poll had been based instead on 5000 adults, do you think the "95% confidence interval" would be wider or narrower than the interval given?
What is the computed z-value for testing the null hypothesis that the proportion of successes in Population 1 exceeds the proportion of successes in Population
The first and third quartiles were 17.95 and 35.45 miles per gallon, respectively, Develop a box plot and comment on the distribution. Is it a Symmetric distribution?
Compute the value of z and state your decision regarding the null hypothesis.
How would you choose an appropriate level of significance for your statistical test? What are the possible outcomes and limitations of your statistical test?
A business journal investigation of the performance and timing of corporate acquisitions discovered that in a random sample of 2,863 firms, 848 announced one or more acquisitions during the year 2000.
Create a histogram over five class intervals.
Make a conclusion about the hypotheses bases on your result( not why, should be it means) Required minimum-1 page
Construct a 95% confidence interval for the average amount its credit card customers spent on their first visit to the chain's new store in the mall assuming that the amount spent follows a normal distribution.
Random sample of 85 group leaders, spent 6.5 years on job before being promoted standard deviation of sample was 1.7 years create 95 percent confience interval.
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