What is the critical value, t-test, p-value? (spss) As part of the National Health Survey conducted by the Department of Health and Human Services, perceptions on the attitude and practices of vaccine were obtained for females aged 18-30 before and after intervention. Listed below are sample mean results. Is there sufficient evidence to support the claim that there is a difference in the attitude and practice between before and after intervention? Use a 0.05 significance level.   Before  After 53.5 58.1 64 62.7 61.3 61.1 66.6 64.8 64.2 63.2 65.1 66.4 68 67.6 63.9 63.5 64.2 66.8 64.3 63.9 64.3 62 67 68.5

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