AP Stats: Chapters 11-12 Review

A random sample of traffic tickets given to motorists in a large city is examined.  The tickets are classified according to the race of the driver.  The results are summarized in the table provided.  Assuming H₀ is true, the expected number of Hispanic drivers who would receive a ticket is

• 10.36
• 11
• 11.84
• 12

A random sample of traffic tickets given to motorists in a large city is examined.  The tickets are classified according to the race of the driver.  The results are summarized in the table provided.  We compute the value of the χ² statistic to be 6.58.  Assuming that the conditions for inference are met, the P-value of our test is

• Between 0.10 and 0.20.
• Between 0.05 and 0.10.
• Between 0.01 and 0.05.
• Less than 0.01.

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.4

CCSS.HSS.ID.B.5

A random sample of traffic tickets given to motorists in a large city is examined.  The tickets are classified according to the race of the driver.  The results are summarized in the table provided.  The category that contributes the largest component to the χ² statistic is

• White.
• Black.
• Hispanic.
• Other.

Tags

CCSS.HSS.CP.A.4

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.4

CCSS.HSS.ID.B.5

All current-carrying wires produce electro-magnetic (EM) radiation, including the electrical wiring running into, through, and out of our homes.  High-frequency EM radiation is thought to be a cause of cancer.  The lower frequencies associated with household current is generally assumed to be harmless.  To investigate the relationship between current configuration and type of cancer, researchers visited the addresses of a random sample of children who died of some form of cancer (leukemia, lymphoma, or some other type) and classified the wiring configuration outside the dwelling as either high-current configuration (HCC) or low-current configuration (LCC).  The data is provided in a table.  The appropriate degrees of freedom for the χ² statistic is

• 1
• 2
• 3
• 4

All current-carrying wires produce electro-magnetic (EM) radiation, including the electrical wiring running into, through, and out of our homes.  High-frequency EM radiation is thought to be a cause of cancer.  The lower frequencies associated with household current is generally assumed to be harmless.  To investigate the relationship between current configuration and type of cancer, researchers visited the addresses of a random sample of children who died of some form of cancer (leukemia, lymphoma, or some other type) and classified the wiring configuration outside the dwelling as either high-current configuration (HCC) or low-current configuration (LCC).  The data is provided in a table.  The expected count of cases of lymphoma in the homes with an HCC is

• 79*31/215
• 10*21/215
• 79*31/10
• 136*31/215

All current-carrying wires produce electro-magnetic (EM) radiation, including the electrical wiring running into, through, and out of our homes.  High-frequency EM radiation is thought to be a cause of cancer.  The lower frequencies associated with household current is generally assumed to be harmless.  To investigate the relationship between current configuration and type of cancer, researchers visited the addresses of a random sample of children who died of some form of cancer (leukemia, lymphoma, or some other type) and classified the wiring configuration outside the dwelling as either high-current configuration (HCC) or low-current configuration (LCC).  The data is provided in a table.  Which of the following may we conclude, based on the test results?

• There is convincing evidence of an association between wiring configuration and the chance that a child will develop some form of cancer.
• HCC either causes cancer directly or is a major contributing factor to the development of cancer in children.
• There is not convincing evidence of an association between wiring configuration and the type of cancer that cause the deaths of children in the study.
• There is convincing evidence that HCC does not cause cancer in children.

All current-carrying wires produce electro-magnetic (EM) radiation, including the electrical wiring running into, through, and out of our homes.  High-frequency EM radiation is thought to be a cause of cancer.  The lower frequencies associated with household current is generally assumed to be harmless.  To investigate the relationship between current configuration and type of cancer, researchers visited the addresses of a random sample of children who died of some form of cancer (leukemia, lymphoma, or some other type) and classified the wiring configuration outside the dwelling as either high-current configuration (HCC) or low-current configuration (LCC).  The data is provided in a table.  A Type I error would occur if we found convincing evidence that

• HCC wiring caused cancer when it actually didn't.
• HCC wiring didn't cause cancer when it actually did.
• There is no association between the type of wiring and the form of cancer when there actually is an association.
• There is an association between the type of wiring and the form of cancer when there actually is no association.

• A
• B
• C
• D

• A
• B
• C
• D

• A
• B
• C
• D