Question: A random sample of size 36 selected from a normal distribution with = 4 has = 75. A second random sample of size 25

A random sample of size 36 selected from a normal distribution with

A random sample of size 36 selected from a normal distribution with = 4 has = 75. A second random sample of size 25 selected from a different normal distribution with = 6 has = 85. Is there a significant difference between the two population means at the 5% level of significance?

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