Questions from Applied Statistics

Q: On Friday night, the owner of Chez Pierre in downtown Chicago

On Friday night, the owner of Chez Pierre in downtown Chicago noted the amount spent for dinner for 28 four-person tables. (a) Find the mean, median, and mode. (b) Do these measures of center agree? E...

Q: (a) For each data set, find the median,

(a) For each data set, find the median, midrange, and geometric mean. (b) Are they reasonable measures of central tendency? Explain.

Q: In the Excel function = TRIMMEAN(Data,.10), how

In the Excel function = TRIMMEAN(Data,.10), how many observations would be trimmed from each end of the sorted data array named Data if (a) n = 41, (b) n = 66, and (c) = 83?

Q: The Comer-Correr Taco Wagon is only open from 11:

The Comer-Correr Taco Wagon is only open from 11:00 a.m. to 2:00 p.m. on Saturday. The owner kept track of the number of customers served on Saturday for 60 weeks. (a) Visually estimate the quartiles...

Q: The city of Sonando Hills has 8 police officers. In January

The city of Sonando Hills has 8 police officers. In January, the work-related medical expenses for each officer were 0, 0, 0, 0, 0, 0, 150, 650. (a) Calculate the mean, median, mode, midrange, and geo...

Q: CitiBank recorded the number of customers to use a downtown ATM during

CitiBank recorded the number of customers to use a downtown ATM during the noon hour on 32 consecutive workdays. (a) Use Excel to find the quartiles. What do they tell you? (b) Find the midhinge. What...

Q: An executive’s telephone log showed the lengths of 65 calls initiated during

An executive’s telephone log showed the lengths of 65 calls initiated during the last week of July. (a) Use Excel to find the quartiles. What do they tell you? (b) Find the midhinge....

Q: For each X-Y data set (n 5 12):

For each X-Y data set (n 5 12): (a) Make a scatter plot. (b) Find the sample correlation coefficient. (c) Is there a linear relationship between X and Y? If so, describe it. Note: Use Excel or MegaSta...

Q: Spirit Airlines kept track of the number of empty seats on flight

Spirit Airlines kept track of the number of empty seats on flight 308 (DEN–DTW) for 10 consecutive trips on each weekday except Friday. (a) Sort the data for each day. (b) Find the mean, median, mode,...

Q: A random sample of 25 items is drawn from a population whose

A random sample of 25 items is drawn from a population whose standard deviation is unknown. The sample mean is x bar = 850 and the sample standard deviation is s = 15. Use Appendix D to find the valu...