Question

age 6o drive The averaクe s a.2フmin. 7ess local cell phcne m ple of 20 l0ca/ AUenage of 2.18 min. lenyt h of A mkelom el phone calls gavedr deviation ot 98 m Cal a n n lénsth , with dt an.03 ean it be concleded the uvenage cell phone teneth diffens Prom the nation dveruge A2.27min ?

Answer 1

2.27

0.98

n=20

2.98

$H_{o}; \mu = \bar{x}$

$H_{o}; \mu \neq \bar{x}$

2.98 2.27 t = 0.98/20

3.24

critical t value at 19 degrees of freedom and 5% significance = 2.093

since calculated t is greater than critical t, we reject the null hypothesis. There is significant difference between the two.