某厂生产某种零件,在正常生产的条件下,这种零件的周长服从正态分布,均值为0.13厘米。如果从某日生产的这种零件中任取9件测量后得[tex=4.071x1.286]Ievg5ZV3qa31RoEUxbhbHIGKL1d4JbILi8Rh3LwcybI=[/tex]厘米,[tex=4.214x1.286]YbjhoDgmNxvXV/unD+HEww==[/tex]厘米。问该日生产的零件的平均轴长是否与往日一样?(已知:[tex=3.643x1.286]uCvVj7oT0SfIUc6Wr9C1dTT15cLAL94/PRfoMl+38ps=[/tex],[tex=6.571x1.286]NCr3ig/vkIGnS+y0fW4Xpdbek9c47501iV6986nCJKM=[/tex],[tex=6.571x1.286]jj4gyTJBcgEvBLiYcsRactVVAp77XjKyGTxxP4tn+zg=[/tex],[tex=5.571x1.286]a1VX/h3yE4yLZkTMQ7cPSSaTSvSPyR8MraUs9x77eec=[/tex])
某厂生产某种零件,在正常生产的条件下,这种零件的周长服从正态分布,均值为0.13厘米。如果从某日生产的这种零件中任取9件测量后得[tex=4.071x1.286]Ievg5ZV3qa31RoEUxbhbHIGKL1d4JbILi8Rh3LwcybI=[/tex]厘米,[tex=4.214x1.286]YbjhoDgmNxvXV/unD+HEww==[/tex]厘米。问该日生产的零件的平均轴长是否与往日一样?(已知:[tex=3.643x1.286]uCvVj7oT0SfIUc6Wr9C1dTT15cLAL94/PRfoMl+38ps=[/tex],[tex=6.571x1.286]NCr3ig/vkIGnS+y0fW4Xpdbek9c47501iV6986nCJKM=[/tex],[tex=6.571x1.286]jj4gyTJBcgEvBLiYcsRactVVAp77XjKyGTxxP4tn+zg=[/tex],[tex=5.571x1.286]a1VX/h3yE4yLZkTMQ7cPSSaTSvSPyR8MraUs9x77eec=[/tex])
1