{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

# hw2 - Stat 503 Homework#2(80pts Due on Thursday 9/10...

This preview shows pages 1–2. Sign up to view the full content.

Stat 503 Homework #2 (80pts) Due on Thursday 9/10 1. (10pts) The mean and SD of a set of 47 body temperature measurements were as follows: y = 36.497 °C s = 0.172 °C If the measurements were converted to °F, and the conversion from Celsius to Fahrenheit is y’ = 1.8 y + 32. (a) (5pts) What would be the new mean and SD? (b) (5pts) What would be the new coefficient of variation? 2. (10pts) A researcher measured the average daily gains (in kg/day) of 20 beef cattle; typical values were 1.39, 1.57,1.44,… The mean of the data was 1.461 and the standard deviation was .178. (a) (5 pts) Express the mean and std in lb/day. ( Hint: 1 kg=2.2 lb) (b) (5 pts) What is the mean and std after we standardize the data? 3. (5pts) In a certain population of the freshwater sculpin, Cottus rotheus, the distribution of the number of tail vertebra is as shown in the table. No. of Vertebrae Percent of Fish 20 3 21 51 22 40 23 6 Total 100 Find the probability that the number of tail vertebrae in a fish randomly chosen from the population (a) (1pt) equals 21 (b) (1pt) is less than or equal to 22

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}