12. Which property of t-distribution is NOT a property of normal distribution? A. The t-distribution curve is bell-shaped. .B. The t-distribution curve is symmetrical about zero. · C. In t distribution, the variance is always greater than 1. D. The total area under the t distribution curve equal to 1.

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12. Which property of t-distribution is NOT a property of normal distribution?
A. The t-distribution curve is bell-shaped.
B. The t-distribution curve is symmetrical about zero.
C. In t distribution, the variance is always greater than 1.
D. The total area under the t distribution curve equal to 1.
13. The following statements tell about the t-distribution EXCEPT
À: The stanđard deviation of the t-distribution is equal to 1.
B. As the degrees of freedom increase, the t-distribution tends to normal distribution.
C. The t-distribution has thicker tails than the normal distribution.
D. The exact shape of a t-distribution depends on the degrees of freedom.
14. Which of the following probability distribution curves has the lowest peak?
A. the standard normal distribution
B. a t-distribution with 5 degrees of freedom
C. a t-distribution with 7 degrees of freedom
D. a t-distribution with 9 dėgrees of freedom
15. Which of the following probability distribution curves has the thickest tails?
A. a t-distribution with 25 degrees of freedom
B. a t-distribution with 23 degrees of freedom
C. a t-distribution with 21 degrees of freedom
D. a t-distribution with 19 degrees of freedom
Transcribed Image Text:12. Which property of t-distribution is NOT a property of normal distribution? A. The t-distribution curve is bell-shaped. B. The t-distribution curve is symmetrical about zero. C. In t distribution, the variance is always greater than 1. D. The total area under the t distribution curve equal to 1. 13. The following statements tell about the t-distribution EXCEPT À: The stanđard deviation of the t-distribution is equal to 1. B. As the degrees of freedom increase, the t-distribution tends to normal distribution. C. The t-distribution has thicker tails than the normal distribution. D. The exact shape of a t-distribution depends on the degrees of freedom. 14. Which of the following probability distribution curves has the lowest peak? A. the standard normal distribution B. a t-distribution with 5 degrees of freedom C. a t-distribution with 7 degrees of freedom D. a t-distribution with 9 dėgrees of freedom 15. Which of the following probability distribution curves has the thickest tails? A. a t-distribution with 25 degrees of freedom B. a t-distribution with 23 degrees of freedom C. a t-distribution with 21 degrees of freedom D. a t-distribution with 19 degrees of freedom
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12. Which property of t-distribution is NOT a property of normal distribution?
A. The t-distribution curve is bell-shaped.
B. The t-distribution curve is symmetrical about zero.
C. In t distribution, the variance is always greater than 1.
D. The total area under the t distribution curve equal to 1.
13. The following statements tell about the t-distribution EXCEPT
À: The stanđard deviation of the t-distribution is equal to 1.
B. As the degrees of freedom increase, the t-distribution tends to normal distribution.
C. The t-distribution has thicker tails than the normal distribution.
D. The exact shape of a t-distribution depends on the degrees of freedom.
14. Which of the following probability distribution curves has the lowest peak?
A. the standard normal distribution
B. a t-distribution with 5 degrees of freedom
C. a t-distribution with 7 degrees of freedom
D. a t-distribution with 9 dėgrees of freedom
15. Which of the following probability distribution curves has the thickest tails?
A. a t-distribution with 25 degrees of freedom
B. a t-distribution with 23 degrees of freedom
C. a t-distribution with 21 degrees of freedom
D. a t-distribution with 19 degrees of freedom
Transcribed Image Text:12. Which property of t-distribution is NOT a property of normal distribution? A. The t-distribution curve is bell-shaped. B. The t-distribution curve is symmetrical about zero. C. In t distribution, the variance is always greater than 1. D. The total area under the t distribution curve equal to 1. 13. The following statements tell about the t-distribution EXCEPT À: The stanđard deviation of the t-distribution is equal to 1. B. As the degrees of freedom increase, the t-distribution tends to normal distribution. C. The t-distribution has thicker tails than the normal distribution. D. The exact shape of a t-distribution depends on the degrees of freedom. 14. Which of the following probability distribution curves has the lowest peak? A. the standard normal distribution B. a t-distribution with 5 degrees of freedom C. a t-distribution with 7 degrees of freedom D. a t-distribution with 9 dėgrees of freedom 15. Which of the following probability distribution curves has the thickest tails? A. a t-distribution with 25 degrees of freedom B. a t-distribution with 23 degrees of freedom C. a t-distribution with 21 degrees of freedom D. a t-distribution with 19 degrees of freedom
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