Statistics Test with Answers
TEST REVIEW – We will work these problems in class. Data Files for these problems will be disclosed in class during the review. On TEST 3, you will be asked to perform hypothesis tests, find confidence intervals, and conduct regression analyses. Be prepared to also interpret information on any Excel print-outs. Test 3 will be a multiple-choice test.
1.
A federal agency responsible for enforcing laws governing weights and measures
n=1 routinely inspects packages to determine whether the weight of the contents is at least as no population st deviation---- T test mean ( not proportion) great as that advertised on the package. A random sample of 18 containers whose
Ho: u=8
H1: u0
F test DA
analysis, the president decided to retain supplier A if there is sufficient statistical evidence that supplier A’s condensers last longer on average than supplier B’s condensers. In an experiment, 30 midsize cars were equipped with air conditioners using type A condensers while another 30 midsize cars were equipped with type B condensers.
The number of miles (in thousands) driven by each car before the condenser broke down was recorded. Should the president retain supplier A?
13-22
Z-TEST: PROPORTION
3.
A new credit card company is investigating various market segments to determine whether it is profitable to direct its advertising specifically at each one. One market segment is composed of Hispanic people. The latest census indicates that there are 30,085,000 Hispanic
Ho:p=0.19
H1:p0
60 years old and asks them whether they smoke at least one pack of cigarettes per day
alpha:0.1 and if they have ever suffered from heart disease (2 = suffer from heart disease and code for success :2
Hypothesized difference :
1 = do not suffer from heart disease). Can the company conclude at the 10% significance
0
level that smokers have a higher incidence of heart disease than nonsmokers?
13-102
5. n=3 anova
It has been established in a
1.
A federal agency responsible for enforcing laws governing weights and measures
n=1 routinely inspects packages to determine whether the weight of the contents is at least as no population st deviation---- T test mean ( not proportion) great as that advertised on the package. A random sample of 18 containers whose
Ho: u=8
H1: u0
F test DA
analysis, the president decided to retain supplier A if there is sufficient statistical evidence that supplier A’s condensers last longer on average than supplier B’s condensers. In an experiment, 30 midsize cars were equipped with air conditioners using type A condensers while another 30 midsize cars were equipped with type B condensers.
The number of miles (in thousands) driven by each car before the condenser broke down was recorded. Should the president retain supplier A?
13-22
Z-TEST: PROPORTION
3.
A new credit card company is investigating various market segments to determine whether it is profitable to direct its advertising specifically at each one. One market segment is composed of Hispanic people. The latest census indicates that there are 30,085,000 Hispanic
Ho:p=0.19
H1:p0
60 years old and asks them whether they smoke at least one pack of cigarettes per day
alpha:0.1 and if they have ever suffered from heart disease (2 = suffer from heart disease and code for success :2
Hypothesized difference :
1 = do not suffer from heart disease). Can the company conclude at the 10% significance
0
level that smokers have a higher incidence of heart disease than nonsmokers?
13-102
5. n=3 anova
It has been established in a