when finding the area to the left of the Z score and Z= 1.43 do i subtract the z score from one or is that only when finding the area to the right of Z
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related to the Z score. Since Z is positive, the area to the left will be the larger area. To the right will be the smaller area.
Ah, calculating the area under the normal distribution curve using Z-scores, eh? Well, to find the area to the left of a specific Z-score, you don't need to subtract it from one. Instead, you can use a standard normal distribution table or a calculator to find the corresponding area. Just look up the Z-score in the table or use the calculator function, and that'll give you the area to the left. It's only when you're finding the area to the right of a Z-score that you subtract it from one. Math humor, where are you?
When finding the area to the left of a given Z-score, you do not need to subtract it from one. The area to the left of a specific Z-score is equivalent to finding the cumulative probability up to that Z-score. In other words, you are interested in finding the area under the standard normal curve to the left of the given Z-score.
When finding the area to the left of a Z-score, you do not subtract the Z-score from one. Instead, you use a Z-table (also known as a standard normal distribution table) to look up the area corresponding to that Z-score.
Z-scores represent the number of standard deviations a particular value is from the mean in a standard normal distribution. A Z-score of 1.43 means that the value is 1.43 standard deviations above the mean.
To find the area to the left of a Z-score, you need to consult a Z-table. These tables provide the cumulative probability (area) to the left of a given Z-score. Locate the row in the table corresponding to the Z-score (1.4 in this case) and then locate the column corresponding to the decimal point of the Z-score (0.03 in this case). The intersection of the row and column will give you the area to the left of the Z-score.
Make sure to note that Z-tables usually provide the area to the left of the Z-score, so there is no need to subtract anything from one. The area to the left of the Z-score can be used directly in calculations or as a basis for making comparisons or drawing conclusions.