# The printout below refers to the weekly closing stock

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122. The printout below refers to the weekly closing stock prices for Air Canada on 20 randomly selected weeks in 2000.Using a 5% level of significance, can you say that the average Air Canada stock price was lessthan \$19.50?Hypothesis Test: Mean vs. Hypothesized Value19.50000hypothesized value17.38750mean Air Canada2.48368std. dev.0.55537std. error20n19df-3.80t.0006p-value (one-tailed, lower) Accessibility: Keyboard NavigationDifficulty: MediumLearning Objective: 09-07 Use a t statistic to test a hypothesis.Topic: 09-15 p-Value in Hypothesis Testing9-60
Chapter 09 - One-Sample Tests of Hypothesis 123. The printout below refers to the weekly closing stock prices for Air Canada on 20 randomly selected weeks in 2000.Using a 5% level of significance, can you say that the average Air Canada stock price was lessthan \$19.00?Hypothesis Test: Mean vs. Hypothesized Value19.000000hypothesized value17.387500mean 192.483680std. dev.0.555368std. error20n19df-2.90t.0046p-value(one-tailed, lower)16.225102confidence interval 95.% lower18.549898confidence interval 95.% upper1.162398half-width Accessibility: Keyboard NavigationDifficulty: MediumLearning Objective: 09-07 Use a t statistic to test a hypothesis.Topic: 09-15 p-Value in Hypothesis Testing9-61
Chapter 09 - One-Sample Tests of Hypothesis 124. The printout below refers to the weekly closing stock prices for Air Canada on 20 randomly selected weeks in 2000.Using a 5% level of significance, can you say that the average Air Canada stock price was lessthan \$18.00?Air Canada Stock Prices in 2000Hypothesis Test: Mean vs. Hypothesized Value18.00000hypothesized value17.38750mean Air Canada2.48368std. dev.0.55537std. error20n19df-1.10t.1419p-value(one-tailed, lower)16.22510confidence interval 95.% lower18.54990confidence interval 95.% upper1.16240half-width