The nine items of a sample have the following values: 45, 47, 50, 52, 48, 47, 49, 53,51. Does the mean of these differ significantly from the assumed mean of these differ significantly from the assumed mean of 47.5?(t0.05=2.31 for 8 degree of freedom)

The nine items of a sample have the following values: 45, 47, 50, 52, 48, 47, 49, 53,51. Does the mean of these differ significantly from the assumed mean of these differ significantly from the assumed mean of 47.5?(t_0.05=2.31 for 8 degree of freedom)

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