This preview shows pages 1–4. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.
View Full DocumentThis preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: 3. The heights of female university students are approximately normally. A sample of 9 female university students yields a mean height of 177 cm and a standard deviation of 6 cm. (a) Find a 95% confidence interval for the mean height of all female university students. (b) Find a 90% confidence interval. (c) Interpret the 90% confidence interval in part (b). 4. Test of hypothesis for one population mean (when is unknown) It is known from studies performed in the past that the weight of Fraser River sockeye salmon during each annual run follows a normal distribution. However the mean weight of fish may fluctuate from year to year depending on many ecological and genetic factors. A researcher would like to test whether or not this years run has a mean population weight of 5 lb. A random sample of nine fish yielded a mean of 4.7 lb and a standard deviation of 0.5 lb. Test the hypothesis of the researcher at the 5% significance level....
View
Full
Document
 Winter '07
 Dan
 Standard Deviation

Click to edit the document details