hypothesis is correct. In a fixed level a significance test, the probability of a Type I error is the significance level a. Section 9.1 Exercises In Exercises 1 to 6, each situation calls for a significance test. State the appropriate null hypothesis Ho and alternative hypothesis Ha in each case. Be sure to define your parameter each time. handed. He wonders if the proportion of lefties at his large community college is really 12%. Simon chooses an SRS of 100 students and records whether each student is right- or left-handed. Attitudes The Survey of Study Habits and Attitudes (SSHA) is a psychological test that measures students' attitudes toward school and study habits. Scores range from 0 to 200. The mean score for U.S. college students is about 115. A teacher suspects that older students have better attitudes toward school. She gives the SSHA to an SRS of 45 of the over 1000 students at her college who are at least 30 years of age. Don't argue! A Gallup Poll report revealed that 72% of teens said they seldom or never argue with their friends. Yvonne wonders whether this result holds true in her large high school. So she surveys a random sample of 150 students at her school. 1. 4. pg 540 Cold cabin? During the winter months, the temper- atures at the Colorado cabin owned by the Starnes family can stay well below freezing (32°F or 0°C) for weeks at a time. To prevent the pipes from freezing, Mrs. Starnes sets the thermostat at 50°F. The manu- 5. 2. Anemia Hemoglobin is a protein in red blood cells that carries oxygen from the lungs to body tissues. People with less than 12 grams of hemoglobin per deciliter of blood (g/dl) are anemic. A public health official in Jordan suspects that Jordanian children are at risk of anemia. He measures a random sample of 50 children. facturer claims that the thermostat allows variation in home temperature of o = 3°F. Mrs. Starnes suspects that the manufacturer is overstating how well the thermostat works. Ski jump When ski jumpers take off, the distance they fly varies considerably depending on their speed, skill, and wind conditions. Event organizers 6. Lefties Simon reads a newspaper report claiming that 12% of all adults in the United States are left- 3. 返回第490页
hypothesis is correct. In a fixed level a significance test, the probability of a Type I error is the significance level a. Section 9.1 Exercises In Exercises 1 to 6, each situation calls for a significance test. State the appropriate null hypothesis Ho and alternative hypothesis Ha in each case. Be sure to define your parameter each time. handed. He wonders if the proportion of lefties at his large community college is really 12%. Simon chooses an SRS of 100 students and records whether each student is right- or left-handed. Attitudes The Survey of Study Habits and Attitudes (SSHA) is a psychological test that measures students' attitudes toward school and study habits. Scores range from 0 to 200. The mean score for U.S. college students is about 115. A teacher suspects that older students have better attitudes toward school. She gives the SSHA to an SRS of 45 of the over 1000 students at her college who are at least 30 years of age. Don't argue! A Gallup Poll report revealed that 72% of teens said they seldom or never argue with their friends. Yvonne wonders whether this result holds true in her large high school. So she surveys a random sample of 150 students at her school. 1. 4. pg 540 Cold cabin? During the winter months, the temper- atures at the Colorado cabin owned by the Starnes family can stay well below freezing (32°F or 0°C) for weeks at a time. To prevent the pipes from freezing, Mrs. Starnes sets the thermostat at 50°F. The manu- 5. 2. Anemia Hemoglobin is a protein in red blood cells that carries oxygen from the lungs to body tissues. People with less than 12 grams of hemoglobin per deciliter of blood (g/dl) are anemic. A public health official in Jordan suspects that Jordanian children are at risk of anemia. He measures a random sample of 50 children. facturer claims that the thermostat allows variation in home temperature of o = 3°F. Mrs. Starnes suspects that the manufacturer is overstating how well the thermostat works. Ski jump When ski jumpers take off, the distance they fly varies considerably depending on their speed, skill, and wind conditions. Event organizers 6. Lefties Simon reads a newspaper report claiming that 12% of all adults in the United States are left- 3. 返回第490页
Chapter9: Sequences, Probability And Counting Theory
Section9.7: Probability
Problem 1SE: What term is used to express the likelihood of an event occurring? Are there restrictions on its...
Related questions
Question
Transcribed Image Text:tema Ive
hypothesis is correct.
In a fixed level a significance test, the probability of a Type I error is the
significance level a.
Section 9.1
Exercises
In Exercises 1 to 6, each situation calls for a significance
test. State the appropriate null hypothesis Ho and
alternative hypothesis Ha in each case. Be sure to define
your parameter each time.
handed. He wonders if the proportion of lefties at
his large community college is really 12%. Simon
chooses an SRS of 100 students and records whether
each student is right- or left-handed.
Don't argue! A Gallup Poll report revealed that
72% of teens said they seldom or never argue with
their friends.' Yvonne wonders whether this result
holds true in her large high school. So she surveys a
random sample of 150 students at her school.
1.
Attitudes The Survey of Study Habits and Attitudes
(SSHA) is a psychological test that measures students'
attitudes toward school and study habits. Scores
range from 0 to 200. The mean score for U.S. college
students is about 115. A teacher suspects that older
students have better attitudes toward school. She gives
4.
pg 540
Cold cabin? During the winter months, the temper-
atures at the Colorado cabin owned by the Starnes
family can stay well below freezing (32°F or 0°C) for
weeks at a time. To prevent the pipes from freezing,
Mrs. Starnes sets the thermostat at 50°F. The manu-
5.
the SSHA to an SRS of 45 of the over 1000 students
at her college who are at least 30 years of age.
Anemia Hemoglobin is a protein in red blood cells
that carries oxygen from the lungs to body tissues.
People with less than 12 grams of hemoglobin per
deciliter of blood (g/dl) are anemic. A public health
official in Jordan suspects that Jordanian children are
at risk of anemia. He measures a random sample of
50 children.
2.
facturer claims that the thermostat allows variation in
home temperature of o = 3°F. Mrs. Starnes suspects
that the manufacturer is overstating how well the
thermostat works.
Ski jump When ski jumpers take off, the distance
they fly varies considerably depending on their
speed, skill, and wind conditions. Event organizers
6.
3.
Lefties Simon reads a newspaper report claiming
that 12% of all adults in the United States are left-
返回第490 页
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