رد: بشروا كيف اختبار الاحصاء ...........................
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بنات حلولي هالمسالتين حست فيها
If the mean of a set of data equals 19.00, and a value X=23.50 has a z-score of 0.75,
then the standard deviation must be:
A) 18 B)6 C)3 D) - 6
The weights (in grams) of the contents of several small bottles are 4, 2, 5, 4, 5, 2 and
6. What is the sample variance?
A) 1.96 B) 4.80 C) 2.33 D) 6.92
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