91影视

The number of cars is 6.

The dataset for the Manufacture鈥檚 and Consumer鈥檚 shock is given as follows:

The Student鈥檚 t-test statistic for the small sample paired difference is,

\(t = \frac{{\bar d - {D_0}}}{{{s_d}/\sqrt {{n_d}} }}\)

Where \(\bar d\) is the sample mean difference, \({s_d}\) is the sample standard deviation difference, and \({n_d}\) is the number of pairs.

The confidence interval for the small sample paired difference for \({\mu _d}\)is:

\(C.I = \left( {\bar d \pm {t_{\frac{\alpha }{2}}}\frac{{{s_d}}}{{\sqrt {{n_d}} }}} \right)\)

Where \({t_{\frac{\alpha }{2}}}\)is based on \(\left( {{n_d} - 1} \right)\) degrees of freedom. \(\)

a.

The given two samples are:

• Manufacturer鈥檚 shock
• Competitor鈥檚 shock.

Here, it is the study of the durability of its shocks.

The Manufacturer鈥檚 shock and the Competitor鈥檚 shocks are dependent samples. So, these two samples are collected as matched pairs.