Biology Forums - Study Force

For a regression analysis to be valid, the error variable must have a standard deviation that is ____________________ regardless of the value of x.
 Fill in the blank(s) with correct word

Q. 2

A sample of size 200 is taken at random from an infinite population. Given that the population proportion is 0.60, the probability that the sample proportion is greater than 0.58 is:
 a. 0.281
  b. 0.719
  c. 0.580
  d. 0.762

Q. 3

For a regression analysis to be valid, the error variable must have a mean of ____________________.
 Fill in the blank(s) with correct word

Q. 4

Given a binomial distribution with n trials and probability p of a success on any trial, a conventional rule of thumb is that the normal distribution will provide an adequate approximation of the binomial distribution if
 a. np  5 and n(1 - p)  5
  b. np  5 and np(1 - p)  5
  c. np  5 and n(1 - p)  5
  d. None of these choices.

Q. 5

For a regression analysis to be valid, the error variable must have a(n) ____________________ distribution.
 Fill in the blank(s) with correct word

Q. 6

As a general rule, the normal distribution is used to approximate the sampling distribution of the sample proportion only if:
 a. the sample size n is greater than 30.
  b. the population proportion p is close to 0.50.
  c. the underlying population is normal.
  d. np and n(1 - p) are both greater than or equal to 5.

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