Exercise $9-5$ Static

$18$

points

eBook

Hint

References

References

b$.$ Test if the stock price increases on more than $60\%$ of the trading days.

$H_0$:$p0\mathrm{.}60$;$H_A$:$p>0\mathrm{.}60$

$H_0$:$p0\mathrm{.}60$;$H_A$:$p<mn\; id="EditorElement\_31452">0</mn><mn\; id="EditorElement\_31453">.</mn><mn\; id="EditorElement\_31454">6</mn><mn\; id="EditorElement\_31455">0</mn>$

$H_0$:$p=0\mathrm{.}60$;$H_A$:$p0\mathrm{.}60$

c$.$ Test if Americans get an average of less than seven hours of sleep.