Fill in the blank to complete the uniform distribution that is described.

A uniform distribution's density curve is defined by the horizontal line y = 0.25 starting at x = -2 and ending at x = ___.

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Let x be a random variable from a binomial distribution with n = 40 and p = 0.9. If a normal approximation is appropriate, give the distribution of x' that would be used in the approximation.

a. x' ~ N(40, 0.9²)

b. normal approximation is not appropriate

c. x' ~ N(36, 1.9²)

d. x' ~ N(36, 3.6²)