In a sample of n = 18 lichen specimens, the researchers found the mean and standard deviation of the amount of the radioactive element, cesium-137, that was present to be 0.009 and 0.006 microcurie per milliliter, respectively. Suppose the researchers want to increase the sample size in order to estimate the mean to within 0.001 microcurie per milliliter of its true value, using a 95% confidence interval. Complete parts a through c. a. What is the confidence level desired by the researchers? The confidence level is

The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 254.4 and a standard deviation of 60.2. (All units are 1000 cells/uL.) Using the empirical rule, find each approximate percentage below. a. What is the approximate percentage of women with platelet counts within 1 standard deviation of the mean, or between 194.2 and 314.6? b. What is the approximate percentage of women with platelet counts between 73.8 and 435.0? a. Approximately 68 % of women in this group have platelet counts within 1 standard deviation of the mean, or between 194.2 and 314.6. (Type an integer or a decimal. Do not round.) b. Approximately % of women in this group have platelet counts between 73.8 and 435.0. (Type an integer or a decimal. Do not round.)

The body temperatures of a group of healthy adults have a​bell-shaped distribution with a mean of 98.36°F and a standard deviation of 0.58°F. Using the empirical​ rule, find each approximate percentage below. What is the approximate percentage of healthy adults with body temperatures within 2 standard deviations of the mean, or between 97.20°F and 99.52°​F? What is the approximate percentage of healthy adults with body temperatures between 96.62°F and 100.10°​F?

The body temperatures of a group of healthy adults have a bell-shaped distribution with a mean of 98.33°F and a standard deviation of 0.52°F. Using the empirical rule, find each approximate percentage below a. What is the approximate percentage of healthy adults with body temperatures within 3 standard deviations of the mean, or between 96.77F and 99.89°F? b. What is the approximate percentage of healthy adults with body temperatures between 97.29°F and 99.37°F? a. Approximately% of healthy adults in this group have body temperatures within 3 standard deviations of the mean, or between 96.77°F and 99.89°F. (Type an integer or a decimal. Do not round.)

The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 255.1 and a standard deviation of 62.2. (All units are 1000 cells/uL.) Using the empirical rule, find each approximate percentage below. a. What is the approximate percentage of women with platelet counts within 3 standard deviations of the mean, or between 68.5 and 441.7? b. What is the approximate percentage of women with platelet counts between 192.9 and 317.3? a. Approximately % of women in this group have platelet counts within 3 standard deviations of the mean, or between 68.5 and 441.7. (Type an integer or a decimal. Do not round.)

A survey of 10 entries in a sales ledger has a mean value of £60 and a standard deviation of £8. What is the 95% confidence interval for the population of entries? Note: please use Bessel's correction.

The blood platelet counts of a group of women have a​ bell-shaped distribution with a mean of 262.6 and a standard deviation of 68.1.​(All units are 1000 ​cells/μ​L.)Using the empirical​ rule, find each approximate percentage below. a. What is the approximate percentage of women with platelet counts within 3standard deviations of the​ mean, or between 58.3 and466.9​? b. What is the approximate percentage of women with platelet counts between 194.5 and 330.7​?   a. Approximately   ​%of women in this group have platelet counts within 3 standard deviations of the​ mean, or between 58.3 and 466.9. ​(Type an integer or a decimal. Do not​ round.)   b. Approximately ​% of women in this group have platelet counts between 194.5 and 330.7.

The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 254.4 and a standard deviation of 61.1. (All units are 1000 cells/µL.) Using the empirical rule, find each approximate percentage below. a. What is the approximate percentage of women with platelet counts within 1 standard deviation of the mean, or between 193.3 and 315.5? b. What is the approximate percentage of women with platelet counts between 71.1 and 437.7? a. Approximately % of women in this group have platelet counts within 1 standard deviation of the mean, or between 193.3 and 315.5. (Type an integer or a decimal. Do not round.)