The number of minutes between arrivals of the Culver City C3 bus is represented as follows. Time Frequency 40-49 16 50-59 88 60-69 46 70-79 12 80-89 214 90-99 22 100-109 2 (a) Approximate the mean length of time between arrivals. (b) Approximate the standard deviation of the length of time between arrivals.

The number of minutes between arrivals of the Culver City C3 bus is represented as follows. Time Frequency 40-49 16 50-59 88 60-69 46 70-79 12 80-89 214 90-99 22 100-109 2 (a) Approximate the mean length of time between arrivals. (b) Approximate the standard deviation of the length of time between arrivals.

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

Explain the statistics measure standard deviation. Provide the formulas used to calculate the standard deviation of a sample and of a population. Explain the difference between sample and population.
A standardized exam's scores are normally distributed. In a recent year, the mean test score was 1463 and the standard deviation was 314. The test scores of four students selected at random are 1870, 1220, 2190, and 1340. Find the z-scores ← that correspond to each value and determine whether any of the values are unusual. F1 The z-score for 1870 is (Round to two decimal places as needed.) The z-score for 1220 is. (Round to two decimal places as needed.) The z-score for 2190 is (Round to two decimal places as needed.) The z-score for 1340 is. (Round to two decimal places as needed.) Which values, if any, are unusual? Select the correct choice below and, if necessary, fill in the answer box within your choice. OA. The unusual value(s) is/are. (Use a comma to separate answers as needed.) OB. None of the values are unusual. F2 80 F3 000 000 F4 F5 ^ MacBook Air F6 & A D F7 * DII F8 DD F9 ) J 운 F10 I a F11 + Next F12 delete
find the standard deviation
A Scenario: Jimmy store sells large tins of Tom Tucker Coffee. The deli uses a periodic review system. Inventory is checked every 10 days which more orders are needed for tins. Order lead time is 3 days. Average demand is 7 tins, so average demand during the reorder period and order lead time (13) is 91 tins. Standard deviation of demand during the same 13 day period is 17 tins.1. Calculate the restocking level ( Assume the desired level is 90%)2. Suppose standard deviation of demand during the 13-day period drops to 4 tins. What happened to restocking level? Explain why?3. Draw a saw-tooth diagram. Beginning inventory level is equal to restocking level and the demand rate is a constant 7 tins per day. What is the safety stock level? What is the average inventory level?
Scores on a statistics exam had a mean of 76 with a standard deviation of 11. Scores on a calculus exam had a mean of 59 with a standard deviation of 13. Compute the coefficient of variation for statistics exam scores. Round the answer to at least two decimal places.
Assume that the distribution of scores on a college entrance exam is normally distributed with a mean of 490 and a standard deviation of 43. For each score in the table below, convert the raw score into a corresponding z-score. original score Z-score 621 398 586 710
In a study 10 people were given a test. The mean test score was 78.9 points. The standard deviationfor the test scores was 5.2 points. If an 11th person takes the test and scores 77 points, predict what willhappen to the mean and standard deviation. Circle the appropriate conclusion in the sentences below. The mean will increase // decrease // stay the same. The standard deviation will increase // decrease // stay the same.
A manufacturer of light bulbs finds that one light bulb model has a mean life span of 1024 h with a standard deviation of 82 h.Find the z-scores for lightbulbs which last 810 and 890 h. (Round your answers to two decimal places.) 810 h: z = 890 h: z =
Accrotime is a manufacturer of quartz crystal watches. Accrotime researchers have shown that the watches have an average life of 36 months before certain electronic components deteriorate, causing the watch to become unreliable. The standard deviation of watch lifetimes is 4 months, and the distribution of lifetimes is normal.
A standardized exam's scores are normally distributed. In a recent year, the mean test score was 1506 and the standard deviation was 317. The test scores of four students selected at random are 1940, 1230, 2190, and 1400. Find the z-scores that correspond to each value and determine whether any of the values are unusual. The z-score for 1940 is. (Round to two decimal places as needed.)