In a random sample of 1000 students, 70% prefer to study at the school campus. The standard error (standard deviation) of the sample proportion is: a) 0.0126 b) 0.0137 c) 0.700 d) 0.0145 e) 0.300

Most people think that the​ "normal" adult body temperature is 98.6°F. In a more recent​ study, researchers reported that a more accurate figure may be 98.1°F. ​Furthermore, the standard deviation appeared to be around 0.7°F. Assume that a Normal model is appropriate.   b) What fraction of people would be expected to have body temperatures above 98.6°​F?

A farm hatches chicken eggs in batches of 15 and there is a 3% infertile rate. Find the standard deviation for the number of infertile eggs per batch. 0.2 O 0.44 0.45 O 0.66 O 43.7

Out of a sample of 100 juice bottles, 68 bottles contain between 1,479 and 1,521 millilitres of juice. Use the empirical rule to estimate the following: a. Average quantity in the juice bottles:   b. Standard deviation in volume of the sample:

Find the mean, standard deviation, and relative standard deviation for the set of measurements (7, 18, 10, 15).

Motovolla is producing batteries for cell phones. A study revealed that while using a cell phone constantly the new batteries lasted an average of 250 minutes with a standard deviation of 10 minutes. The data also appeared to be normally distributed. What percent of the batteries lasted less than 4 hours (240 minutes)? 信 54.15 34 1N 13.6% 136N O a) 84.1% O b) 97.7% O ) 15.9% O d) 47.7%