Question
For questions 1-5 use a normal random variable X with x-bar = 60 and s = 6. Compute the Z-score for X = 52. a.
For questions 1-5 use a normal random variable X with x-bar = 60 and s = 6.
- Compute the Z-score for X = 52.
a. 1.33 b. 0.4082 c. 1.33 d. 0.0918 e. not given
- Determine the value of X that is equivalent to a Z-score of 1.96.
a. 67.96 b. 61.96 c. 48.24 d. 76.71 e. not given
- Find the probability that X is between forty-five and seventy-five.
a. 0.9587 b. 0.0062 c. 0.0537 d. 0.9463 e. not given
- Give the probability that X is at most 78.5.
a. 0.999 b. 0.4990 c. 3.08 d. 0.001 e. not given
- Calculate the value, Xo, such that P (X < Xo) is 0.3023?
a. -0.85 b. 65.1 c. 52.9 d. 0.85 e. not given
- What is the value for P(Z<1.96).
a. 0.9750 b. 0.4500 c. 0.0250 d. 0.4750 e. not given
- Which value of Zo satisfies P(Z
a. 0.44 b. 0.954 c. 0.44 d. 0.7486 e. not given
- Choose the correct standard error for x-bar if s = 5.4756 and n = 36.
a. 0.5121 b. 0.39 c. 0.9126 d. 0.065 e. not given
- Calculate the z-score for x = 58 if x-bar is 70 and s^2 is 5.
a. 5.37 b. 2.4 c. 2.4 d. 5.37 e. not given
- Determine P(-1.23
a. 0.2171 b. 0.5643 c. 0.1736 d. 0.3907 e. not given
- In a population of normally distributed aptitude scores of 1000 academy students with mean 70 and
Standard deviation 10, how many score below 95?
a. 494 b. 6 c. 25 d. 250 e. not given
- The z-score for x-bar = 2.7, = 3, s = 1, and n = 100 is:
a. 30 b. 3 c. 0.3 d. 3 e. not given
- Find a 95% confidence interval for if s = 5.26, x-bar = 70.1, and n = 49.
a. 70.1+/-0.2104 b. 70.1+/-1.2361 c. 70.1+/-1.4728 d. 70.1+/-1.6772 e. not given
- Compute a 99% confidence interval for if x-bar = 16.3, s = 1.5, and n = 25.
a. 16.3+/-0.8391 b. 16.3+/-0.774 c. 16.3+/-0.8361 d. 16.3+/-0.16782 e. not given
- Given Ho: 80 testing at alpha level 0.01 with s = 7, n = 49, and x-bar = 83. Find the p-value.
a. 0.0013 b. 0.05 c. 0.01 d. 0.17 e. not given
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