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1. For the following data, construct a 95% prediction interval for x = 12.
x
1
3
5
7
9
11
y
16
36
43
65
80
88
2. The data given below are from a random sample of height (in inches) and weight (in pounds) of seven basketball players.
Height
73
83
77
85
71
Weight
186
234
208
237
265
190
220
Construct a 99% prediction interval for height equal to 90. Interpret the result and state any assumptions.
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Use the Wilcoxin Rank Sum test for independent samples to determine if the median age of a car and a taxi are different.
the length of an injection-molded plastic case that holds magnetic tape is normally distributed with a length of 90.2
College Students' Seating Choices and Motivation to Achieve.This activity is a revision of an activity found in Real Data: A Statistics Workbook Based on Empirical Data by Z. C Holcomb (1997). Published by Pyrczak Publishing.
(a) What value would you expect to find for the mean of all these sample means? (Give your answer correct to nearest whole number.)
In 2001, the US Department of Labor reported the average hourly earnings for US production workers to be $14.32 per hour. A sample of 75 production workers during 2003 showed a sample mean of $14.68 per hour.
The regression line yˆ2 = 3 + 2x has been fitted to the data points (4,8), (2,5), and (1,2). The residual sum of squares will be:
suppose iq scores were obtained from randomly selected twins. for 20 such pairs of people the linear corelation
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the probability of pass a test is 0.76 at a particular school. suppose we randomly select a class of 10 students from
There are three loan officers at Farmer National Bank. All decisions on mortgage loans are made by one of these officers. The president of the bank would like to be sure that the rejection rate is about the same for the three officers.
Write a paragraph describing your interpretation when the slope is positive, zero, and negative. If you were buying a home in this particular city, which slope would be most attractive to you and why?
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