The Prices (In Dollars) for a Graphing Calculator Are Shown $5.4 < \sigma < 13.7$

question 42

Multiple Choice

The prices (in dollars) for a graphing calculator are shown below for 8 online vendors. Estimate the population standard deviation in price with 90% confidence.
148 133 136 152
140 143 129 139

• A) \(5.4 < \sigma < 13.7\)
• B) \(7.3 < \sigma < 7.9\)
• C) \(6.4 < \sigma < 12.3\)
• D) \(7.1 < \sigma < 10.3\)