#2) A large warehouse installed a security system a few years ago. Under an older system the managers estimated that they were losing an average of $678 worth of goods to thieves each week. A random sample of 36 weekly records under the current system showed that they were still losing an average of $650 worth of goods each week. The sample standard deviation was s = $93. Does this indicate that the average loss is different (either more or less) than the previous $678 per week? Use a 5% level of significance. #2) a) b) d) e) f)

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
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  1. State the null and alternate hypothesis.
  2. Will you use a left tail, right tail or 2 tailed test?
  3. Identify the sampling distribution to be used: standard normal, Student’s t or chi squared.
  4. Find the value of the test statistic.
  5. Find the P-Value.
  6. Based on your answers, shall we reject or accept the null hypothesis?
  7. Write the conclusion in the context of the problem.
#2) A large warehouse installed a security system a few years ago. Under an older system the
managers estimated that they were losing an average of $678 worth of goods to thieves each
week. A random sample of 36 weekly records under the current system showed that they were
still losing an average of $650 worth of goods each week. The sample standard deviation was s =
$93. Does this indicate that the average loss is different (either more or less) than the previous
$678 per week? Use a 5% level of significance.
#2) a)
b)
d)
e)
f)
Transcribed Image Text:#2) A large warehouse installed a security system a few years ago. Under an older system the managers estimated that they were losing an average of $678 worth of goods to thieves each week. A random sample of 36 weekly records under the current system showed that they were still losing an average of $650 worth of goods each week. The sample standard deviation was s = $93. Does this indicate that the average loss is different (either more or less) than the previous $678 per week? Use a 5% level of significance. #2) a) b) d) e) f)
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