Question:
The breaking strengths of cables produced by a certain manufacturer have a standard deviation of 105 pounds. A random sample of 70 newly manufactured cables has a mean breaking strength of 1750 pounds. Based on this sample, find a 90 % confidence interval for the true mean breaking strength of all cables produced by this manufacturer. Then complete the table below.
Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place.
51,56,61,61,65,69,72,73,73,73,74,75,76,79,79,81,83,87,87,93,95
Which measures of central tendency do not exist for this data set?
- Mean
- Median
- None
- None of these measures
Suppose that the measurement 95 (the largest measurement in the data set) were replaced by 148. Which measures of central tendency would be affected by the changed? Choose all that apply.
- Mean
- Median
- None
- None of these measures
Suppose that starting with the original data set the largest measurement were to removed. Which measures of central tendency would be changed from those of the original data set? Choose all that apply.
- Mean
- Median
- None
- None of these measures
Which of the following best describes the distribution of the orginal data set
- Negative skewed
- Positively skewed
- Roughly skewed symmetrical