A quality control manager wants to check the quality of products in his textile factory by conducting a survey. On a certain day, the number of products produced is recorded as follows. Category Ties Suits Trousers Shirts Sweaters Number of items 300 450 600 750 300 It is required that 4% of the produced products should be selected for inspection. The following are two suggested methods for selecting the sample. Method I: Select items randomly from all produced products. Select items randomly from each category of clothing and the number of items selected from each category are in proportion to the number of items produced in that category. (a) Find the total sample size. (b) Write down the name of the sampling method for method I and method II respectively. (c) If Method II is used, find (i) the number of ties and (ii) the number of shirts in the sample.

A quality control manager wants to check the quality of products in his textile factory by conducting a survey. On a certain day, the number of products produced is recorded as follows. Category Ties Suits Trousers Shirts Sweaters Number of items 300 450 600 750 300 It is required that 4% of the produced products should be selected for inspection. The following are two suggested methods for selecting the sample. Method I: Select items randomly from all produced products. Select items randomly from each category of clothing and the number of items selected from each category are in proportion to the number of items produced in that category. (a) Find the total sample size. (b) Write down the name of the sampling method for method I and method II respectively. (c) If Method II is used, find (i) the number of ties and (ii) the number of shirts in the sample.

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section11.4: Collecting Data

Problem 2E

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