Consider a population proportion p = 0.68. a-1. Calculate the expected value and the standard error of P− with n = 30. (Round "expected value" to 2 decimal places and "standard deviation" to 4 decimal places.) a-2. Is it appropriate to use the normal distribution approximation for P− ? Yes No b-1. Calculate the expected value and the standard error of P− with n = 40. (Round "expected value" to 2 decimal places and "standard deviation" to 4 decimal places.) b-2. Is it appropriate to use the normal distribution approximation for P− ?

a) Expected value = 20.4, Standard error = 0.085

b) Yes

c) Expected value = 27.2, Standard error = 0.073

d) Yes

Step-by-step explanation:

We are given the following in the question:

Population proportion, p = 0.68

a) expected value and the standard error

Sample size, n = 30

b) Yes it is appropriate to use normal approximation as:

c) expected value and the standard error

Sample size, n = 40

b) Yes it is appropriate to use normal approximation as:

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step-by-step explanation:

answer:   (s+1)(s+4)

step-by-step explanation:

factor s2+5s+4

s2+5s+4

=(s+1)(s+4)