Weights of women in one age group are normally distributed with a standard deviation sigma of 20 lb. a researcher wishes to estimate the mean weight of all women in this age group. find how large a sample must be drawn in order to be 90% confident that the sample mean will not differ from the population mean by more than 3.5 lb.

88.344 or Rounding up to 89

Step-by-step explanation:

When talking about the confidence level, we need to find the z-score for 90% confidence. Since z-scores are constant values we can easily find these online. In this case the z-score for 90% confidence is z = 1.64485

The formula for z-score is as follow

Where

Now we know from the question that

We can easily solve the above equation to find the Standard Deviation

To find Population Size

correct answer is option b.

step-by-step explanation:

the true statement about geometric figure is option b that is one line can be drawn through all three points.

if three points are on the same plane, they can be connected by a line.

n=1.75+1.75

step-by-step explanation:

3.5/2=1.75