This preview shows page 1. Sign up to view the full content.
Unformatted text preview: 11.65, 11.73,
12.15, 11.68, 11.85, 11.97, 11.70, 11.75, 11.87, 12.08
(a) Compute the sample mean x and the sample standard deviation s.
¯
(b) Make a Normal QQ plot for the data. Comment on the normality assumption.
(c) Construct a 90% (twosided) conﬁdence interval for the overall average weight of beef
in a 3/4pound burger at Burger Queen.
(d) Burger Queen claims that “3/4pound” burgers contain an average of at least 12 ounces
of beef. Find the pvalue for the test H0 : µ ≥ 12 versus H1 : µ < 12. STAT 420 Spring 2014: HW 1 2 University of Illinois Exercise 5
Assume that the distributions of X and Y are N(µ1 , σ 2 ) and N(µ2 , σ 2 ), respectively. Given
the n = 4 observations of X ,
105, 130, 135, 150
and the m = 6 observations of...
View
Full
Document
This homework help was uploaded on 04/03/2014 for the course STAT 420 taught by Professor Stepanov during the Spring '08 term at University of Illinois, Urbana Champaign.
 Spring '08
 Stepanov
 Statistics, Standard Deviation

Click to edit the document details