1. An estimate of the mean time taken by this group of workers is:A. 51.7 minB. 47.0 minC. 49.7 minD. 50.0 min 6. The following histogram gives the times taken by a random sample of workers of a company tocomplete a specific task.Number of Workers10298765432 TO2010203050Time (min)4060 70 8090

First we convert histogram into frequency table, class frequency(f) 10-20 0 20-30 2 30-40…

Answered: An estimate of the mean time taken by…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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The data represents the daily rainfall (in inches) for one month. Construct a frequency distribution beginning with a lower class limit of 0.00 and use a class width of 0.20. Does the frequency distribution appear to be roughly a normal distribution?
The depths (in inches) at which 10 artifacts are found are listed. Complete parts (a) and (b) below. 25.5 41.5 35.9 38.8 45.3 36.7 23.1 31.2 36.6 30.7 O (a) Find the range of the data set. Range = (Round to the nearest tenth as needed.) (b) Change 45.3 to 54.5 and find the range of the new data set. Range =O (Round to the nearest tenth as needed.)
Compute this measure of central tendency and explain what this means in everyday language. The frequency table is given as: X Frequency proportion percent 0 7 0.35 35% 1 4 0.20 20% 2 3 0.15 15% 3 2 0.10 10% 5 1 0.05 5% 7 1 0.05 5% 8 1 0.05 5% 9 1 0.05 5% Total 20 1 100%
Average monthly wages (per employee) in 4 sectors of an economy are as follows: industry: 2000 dinars, building: 2200 dinars, agriculture: 1500 dinars, services: 1800 dinars. Number of people employed in the four sectors are 5 million, 2 million, 6 million, and 2 million, respectively. Using the concept of harmonic mean compute the average monthly wages in the economy under consideration.
d. Population size e. Shape of the distribution f. Is this variable discrete or 40-49.9 15 50-59.9 10 60-69.9 continuous? g. Make a histogram or a bar chart (as appropriate) for this data. 70-79.9 1 2. A researcher visited 29 randomly selected Starbucks locations and recorded the number of cappuccinos sold at each coffee shop on March 22. He summarized the data in the following frequency distribution table: For this scenario, identify the following: 1. Variable 2. Individual (Subject) 3. Sample 4. Sample size 5. Class (bin) width 6. Is the variable discrete or Variable Frequency 5-9 10-14 15-19 8. 20-24 10 continuous? 25-29 4 7. How many Starbucks locations sold at least 10 cappuccinos? 8. What percent of Starbucks locations sold at least 10 cappuccinos? 3. This table presents the price distribution of shoe styles offered by an online outlet. Variable FreguencyY 2.
A random sample of people were selected in order to compare the hight between vegetarians and non-vegetarians. The relative-frequency histograms below show the height distribution of the fifteen vegetarian persons in the group and and the remaining people who are not vegetarian. What can be correctly concluded from these graphs? Vegetarian Not a Vegetarian 0.4 0.4 0.3 0.3 02 0.2 0.1 0.1 0.0 0.0 140 150 160 170 180 190 200 140 150 160 170 180 190 200 Height (cm) Height (cm) Select one or more: O a. being vegetarian causes people to be shorter on average O b. more than 30% of vegetarians in this study are between 160cm and 165cm tall Oc. the range of vegetarians heights is larger than the range of non-vegetarians heights O d. more than 45% of non-vegetarians in this study are more than 170cm tall Relative Frequency of Height (cm) Relative Frequency of Height (cm)
The following 10 values represented in the frequency table are the race finish times in hours for a randomly selected group of participants in an extreme 10-kilometre race (a 10k race with obstacles). Which of the following is closest to the mean of the data set? Hours f 0.9 1 1 1.1 1.2 1 1.3 1.4 1.5 N = 10 O 1.5 hours O 1.37 hours O 1 hours O 1.2 hours 21

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An estimate of the mean time taken by this group of workers is: A. 51.7 min B. 47.0 min C. 49.7 min D. 50.0 min