- A key management principal is to base management decisions on
- histograms instead of bar charts
- order statistics
- sample values
- population values
- Sampling error results from the
- consequence of a poor sampling frame
- using the median in place of the mean
- amount of fluctuation of a statistic calculated from sample to sample
- mistake of not using a random sample
- To indicate the population mean, use the lowercase Greek letter
a. θ (theta) b. σ (sigma) c. ω (omega) d. μ (mu)
- If a normally distributed population has a mean of 50 and standard deviation of 10, about what percentage of values are between 40 and 60?
a. 99% b. 68% c. 34% d. 100%
- The primary difficulty in obtaining the true population values, such as for the population mean, is
- lack of understanding of statistical principles
- lack of funding
- random fluctuation
- improper computer analysis
- The sampling frame is the
- desired population from which the sample is drawn
- actual population from which the sample is drawn
- actual population from which the sample should be drawn
- desired population from which the sample should be drawn
- For a normal distribution, the mean must be _____ and the standard deviation must be _____.
- negative, zero or positive; positive
- positive; negative, zero or positive
- positive; positive
- B. negative, zero or positive; negative, zero or positive;
- What is the probability that a randomly selected value from a normal distribution has a standard score larger than 5?
a. 1.000000000 b. 0.028700000 c. 0.000000287 d. 0.500000000
- Reporting a margin of error about a sample mean is an example of a
a. hypothesis test b. confidence interval c. random simulation d. sample statistic
- To indicate the population standard deviation, use the lowercase Greek letter
a. σ (sigma) b. μ (mu) c. θ (theta) d. ω (omega)