Test of Hypothesis
One sample Test
Part A
1. A coin is tossed 1000 times and 540 heads appear. At = 0.05, test the claim that this is a biased coin.
2. Increasing numbers of businesses are offering child-care benefits for their workers. However, one union
Example: Suppose we want to find the relationship between the show sizes of women
and their height. We randomly selected 5 women and recorded their shoe sizes and
heights.
Shoe Size
Height in.
5
59
6.5
62
7
7.5
62
63
9
70
Scatterplot Height VS Shoe Size
7
CHAPTER 11 Simple Linear Regression EXAMPLE
An experiment involving five subjects is conducted to determine the relationship between the percentage of a certain drug in the bloodstream and the length of time it takes the subject to react to a stimulus.
Re
Test Hypothesis about two population means
1. It is conjectured that classes that use a statistical computer package, such as Minitab, do better in
statistics courses than those who dont use technology. A random sample of 24 students uses a
Minitab while
Review for TEST I
Make sure to identify all elements of Test of Hypothesis and Confidence Interval, such as :
Point estimator, Sampling Error, Test statistic, Critical value, P-value, Rejection Region, Level of
significance, Error type I and II, Null and
Empirical and Chebyshevs Rule Review
1. The 2013 Australian Open statistician reported that the mean serve speed of the best women tennis
players was 100 miles per hour (mph) and the standard deviation was 10 mph.
a) Assume that the statistician also gave
STA 3145
Review for Test 1
Part A
1. You want to buy a fuel efficient hybrid, but you do not know if the new technology is reliable yet. A
Consumer Report article list the average repair cost over five years of ownership as $658 with a standard
deviation
Comparing Two Population Means (matched pairs and independent samples)
1.
The personnel manager of a large clothing store suspects that weekday workers take longer breaks on the average
compared to the weekend shifts. A random sample of 46 weekday workers
Confidence Interval for a Population Mean
1. A physician wanted to estimate the mean length of time that a patient had to wait to see him after
arriving at the office. A random sample of 36 patients showed a mean waiting time of 23.4 minutes and a
standar