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1. A point estimate is defined as:
A) the average of the sample values
B) the average of the population values
C) a single value that is the best estimate of an unknown population parameter
D) a single value that is the best estimate of an unknown sample statistic
2. Your statistics instructor wants you to determine a confidence interval estimate for the mean test score for the next exam. In the past, the test scores have been normally distributed with a mean of 74.2 and a standard deviation of 30.9. A 95% confidence interval estimate if your class has 30 students is:
A) 68.72 to 79.68
B) 13.64 to 134.76
C) 64.92 to 83.48
D) 63.14 to 85.26
When using past data, I have found that the proportion of items rejected by quality control personnel is about 3%. We normally make 5000 items per day. For a p chart, what are the upper and lower control limits?
When the p-value is used for hypothesis testing, the null hypothesis is rejected if
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