d. How many degrees of freedom are there? e. If appropriate perform a test of independence, using the =0.05 level of significance. If not appropriate, explain why.

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A: Here,  Given, Grade f A 16 B 8 C 7 D 5 F 4 Formula: Relative…

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A: The provided information is  µ=120x¯=125…

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Q: Find the value of X using Normal Distribution, if P(-X <Z<+X) = 0.9756 1.55 O 0.77 O 1.78 O 3.15 O…

A: We use standard normal z table to find the required solution.

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Q: Find the mean and variance of Z.

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Q: The college is planning to add a food vender in the student union and would like to know what type…

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