A company has a contract to supply specialized batteries to a manufacturer with a mean width of 54mm and a standard deviation of 1.5 or less with an alpha of 0.10.The company randomly tests 25 of these batteries to ensure that they are meeting the requirements of the contract.If the most recent test had a standard deviation of 1.8 what would be the observed chi-squared value?
A)34.56
B)36.42
C)16.67
D)33.20
E)-34.56

Question

Quizplus · Accepted Answer

The observed chi-squared value is calculated using the formula: χ² = (n-1)s²/σ², where n is the sample size, s is the sample standard deviation, and σ is the population standard deviation. Here, χ² = (25-1)(1.8)²/(1.5)² = 34.56.

A Company Has a Contract to Supply Specialized Batteries to a Manufacturer