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Author Question: The probability that a continuous random variable takes any specific value a. is equal to zero. ... (Read 41 times)

Tirant22

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on: Jun 24, 2018
The probability that a continuous random variable takes any specific value
 a. is equal to zero.
   b. is at least 0.5.
   c. depends on the probability density function.
   d. is very close to 1.0.

Question 2

The average score of a sample of 30 students on their second statistics examination was 85 with a standard deviation of 11 . Is the variance of the population significantly more than 80? Use a .05 level of significance.


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mcomstock09

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Reply #1 on: Jun 24, 2018
Answer to Question 1

a

Answer to Question 2

H0: 2  80
Ha: 2 > 80
chi-square = 43.86 > 42.557 (p-value is between .025 and .05); reject H0
The population variance is significantly more than 80.


Tirant22

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Reply 2 on: Jun 24, 2018
YES! Correct, THANKS for helping me on my review

diana chang

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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