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What is a score value?
for a normal-shaped distribution with n=50 and siqma =8 : a- what proportion of the scores have values between 46 and 54? b- for samples of n= 4, what means have values what proportion of the sample mean have values between 46 and 54? c- for samples of n= 16, what means have values what proportion of the sample mean have values between 46 and 54?
What are the 4 types of proportion?
direct proportion indirect proportion additive proportion partitive proportion
In order to make a porportions with two ratios what must be true about the ratios?
If there is a proportion a/b = c/d, then ad = bc. Examples: 3/4 =? 5/6 3 x 6 =? 4 x 5 18 = 20 False (this is not a proportion) 16/6 =? 8/3 16 x 3 =? 6 x 8 48 = 48 True (this is a proportion)
How do you tell a ratio from a proportion?
A ratio is simply a comparison between 2 numbers. Example- 4:3 A proportion is 2 fractions equal to each other or "proportionate".
What fractions are between one eighth and one fourth?
1/8 can be expressed as 2/16 1/4 can be expressed as 4/16 A fraction between 2/16 and 4/16 is 3/16
