Null Hypothesis Sample Deviation Effects
Not what you're looking for?
2)Your company has recently changed suppliers of a certain raw material in an effort to reduce the number of defective units being produced at your plant. During the past year, the sampling has indicated a daily mean of 21.2 defective units. After testing the new suppliers raw materials for 30 days, it was found that the mean during the trial period was 19.8 with a sample deviation of 5. Testing at the 5% level of significance, has the change in suppliers had the desired effect?
Complete the following
H0:  =
H1: 
Alpha =
St. error =
n =
sample mean =
Calculations leading to your conclusion:
Final answer:
6.How does changing the alpha value affect the width of the confidence interval?
7.How does increasing the sample size affect the width of the confidence interval?
Purchase this Solution
Solution Summary
The expert examines null hypothesis sample deviation effects. The sample mean effects are provided.
Solution Preview
Please see the attached file.
2) Your company has recently changed suppliers of a certain raw material in an effort to reduce the number of defective units being produced at your plant. During the past year, the sampling has indicated a daily mean of 21.2 defective units. After testing the new suppliers' raw materials for 30 ...
Purchase this Solution
Free BrainMass Quizzes
Measures of Central Tendency
Tests knowledge of the three main measures of central tendency, including some simple calculation questions.
Measures of Central Tendency
This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.
Terms and Definitions for Statistics
This quiz covers basic terms and definitions of statistics.
Know Your Statistical Concepts
Each question is a choice-summary multiple choice question that presents you with a statistical concept and then 4 numbered statements. You must decide which (if any) of the numbered statements is/are true as they relate to the statistical concept.