People were polled on how many books they read the previous year. How many subjects are needed to estimate the number of books read the previous year within one book with 99% confidence? Initial survey results indicate that standard deviation= 15.9 books.

41. % of women in us consider reading a favorite past time randomly u ask 6 women if it is their favorite pastime what's the probability that 5 respond no

To calculate the number of subjects needed to estimate the number of books read within one book with 99% confidence, we need to use the formula for sample size determination.

The formula is:

n = (Z^2 * σ^2) / E^2

Where:
n = the sample size
Z = the z-score corresponding to the desired confidence level (in this case, 99% confidence)
σ = the standard deviation of the population
E = the maximum allowable error (in this case, one book)

In this case, we are already given that the standard deviation (σ) is 15.9 books and the maximum allowable error (E) is one book. We just need to find the value of the z-score (Z) for 99% confidence.

The z-score for 99% confidence can be found using a standard normal distribution table or a calculator. For a 99% confidence level, the z-score is approximately 2.576.

Now we can plug in the values into the formula:

n = (2.576^2 * 15.9^2) / 1^2

Calculating this, we get:

n ≈ (6.640576 * 252.81) / 1

n ≈ 1678.231136 / 1

n ≈ 1678.231136

Rounding up to the nearest whole number, we need approximately 1679 subjects to estimate the number of books read the previous year within one book with 99% confidence.