a. $H_{1}: \mu=6.6$ b. $H_{1}: \mu eq 6.6$ C. $H_{1}: \mu geq 6.6$ d. $H_{1}: \mu> 7.6$ $H_{1}: \mu eq 6.6 \quad H_{1}: \mu \geq 6.6 \quad H_{1}: \mu=6.6 \quad H_{1}: \mu>7.6$ $H_{1}: N eg 6.6$ d. $H_{1}: \mu>7.6$ Ho tailed test 15. A hypothesis regarding the weight of newborn infants at a community hospital is that the mean is $6.6$ pounds. A sample of seven infants is randomly selected and their weights at birth are recorded as $9.0,7.3,6.0,8.8,6.8,8.4$. and $6.6$ pounds. What is the sample mean? $\frac{\text { a } 6.6}{\text { b } 7.6]$ d. $2.447$ S.P.PB.202