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A project company hired 1000 casual employees to undertake a major housing project. On average (daily basis) these workers take 8 hours to complete a given task with a s.d deviation of 2 hours. If completion а. time is normally distributed, determine the no. of workers who completed the task in:- More than 13.5 hours Between 6.5 hours and 14.5 hours Between 2.5 hours and 5.8 hours iv. Between 14.4 hours and 14.8 hours

A project company hired 1000 casual employees to undertake a major housing project. On average (daily basis) these workers take 8 hours to complete a given task with a s.d deviation of 2 hours. If completion а. time is normally distributed, determine the no. of workers who completed the task in:- More than 13.5 hours Between 6.5 hours and 14.5 hours Between 2.5 hours and 5.8 hours iv. Between 14.4 hours and 14.8 hours

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.1: Measures Of Center
Problem 9PPS
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令ll 90%■11:30 A project company hired 1000 casual employees to undertake a major housing project. On average (daily basis) these workers take 8 hours to complete a given task with a s.d deviation of 2 hours. If completion time is normally distributed, determine the no. of workers who completed the task in:- а. More than 13.5 hours 1i. Between 6.5 hours and 14.5 hours ii. Between 2.5 hours and 5.8 hours Between 14.4 hours and 14.8 hours From the following data of marks obtained by 12 students in Research and Statistics, calculate the correlation coefficient b. by the Spearman rank correlation method and comment on the result. Marks in Research: 53 65 70 68 53 69 77 65 29 65 77 53 Marks in Statistics: 50 50 55 53 58 78 70 48 50 63 68 52 B I II II
Transcribed Image Text:令ll 90%■11:30 A project company hired 1000 casual employees to undertake a major housing project. On average (daily basis) these workers take 8 hours to complete a given task with a s.d deviation of 2 hours. If completion time is normally distributed, determine the no. of workers who completed the task in:- а. More than 13.5 hours 1i. Between 6.5 hours and 14.5 hours ii. Between 2.5 hours and 5.8 hours Between 14.4 hours and 14.8 hours From the following data of marks obtained by 12 students in Research and Statistics, calculate the correlation coefficient b. by the Spearman rank correlation method and comment on the result. Marks in Research: 53 65 70 68 53 69 77 65 29 65 77 53 Marks in Statistics: 50 50 55 53 58 78 70 48 50 63 68 52 B I II II
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