Ho) and alternative hypothesis (upper- or lower-tailed???] 1. The U.S. Department of Education's National Center for Education Statistics (NCES) tracked the progress of first-time students seeking a bachelor's degree or its equivalent and attending a four-year institution full-time in the 2000-01 school year. It found that only 36 percent of these students graduated from college within four years. Later, a random sample of 341 college students showed 130 graduating within four years. Is there evidence this graduation rate has improved? Ho: words: symbols: Ha: words: symbols: Deef

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Chapter1: Starting With Matlab
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Name
Нуpotheses
Statistics Chapter 18: Forming
Do NOT solve the following problems; instead do the following
a. underline the statement about the parameter.
b. double underline the information about the statistic, and
c. write the null hypothesis (Ho) and alternative hypothesis [upper- or lower-tailed???]
1. The U.S. Department of Education's National Center for Education Statistics (NCES)
tracked the progress of first-time students seeking a bachelor's degree or its equivalent and
attending a four-year institution full-time in the 2000-01 school year. It found that only 36
percent of these students graduated from college within four years. Later, a random sample
of 341 college students showed 130 graduating within four years. Is there evidence this
graduation rate has improved?
Ho: words:
symbols:
Ha: words:
symbols:
2. Professional sports teams sometimes "black out" home games on local television to
encourage ticket sales. A team owner believes that in the past, 30% of those attending
blacked out games were motivated to attend by the blackouts. He wonders if this
percentage has decreased so he arranges to poll a random sample of fans at blacked out
games and finds that 43 of 166 fans said they were motivated to attend by blackouts.
Ho: words:
symbols:
Ha: words:
symbols:
3. The unemployment rate in France is reported by the government in September 2010 to be
10%. Is the employment rate higher than the government is reporting? A random sample of
934 French people showed 12.3% unemployed.
Ho: words:
symbols:
Ha: words:
symbols:
4. In a rural area only about 30% of the wells drilled 100 ft or less find water. A local man
claims to be able to find water by "dowsing"-waving a forked stick over the ground to
detect where a well should be drilled. You check with 80 of his customers and find that 27
have working wells less than 100 feet deep.
Ho: words:
symbols:
Ha: words:
symbols:
5. Many people have trouble setting up the features of their cell phones so a company has
developed what it hopes will be easier instructions. Their goal is to have no more than 4%
of their customers fail to succeed using the new instructions. They test the system on 200
people of whom 12 are unsuccessful. Is this evidence that they failed to meet their goal?
Ho: words:
symbols:
Ha: words:
symbols:
Transcribed Image Text:Name Нуpotheses Statistics Chapter 18: Forming Do NOT solve the following problems; instead do the following a. underline the statement about the parameter. b. double underline the information about the statistic, and c. write the null hypothesis (Ho) and alternative hypothesis [upper- or lower-tailed???] 1. The U.S. Department of Education's National Center for Education Statistics (NCES) tracked the progress of first-time students seeking a bachelor's degree or its equivalent and attending a four-year institution full-time in the 2000-01 school year. It found that only 36 percent of these students graduated from college within four years. Later, a random sample of 341 college students showed 130 graduating within four years. Is there evidence this graduation rate has improved? Ho: words: symbols: Ha: words: symbols: 2. Professional sports teams sometimes "black out" home games on local television to encourage ticket sales. A team owner believes that in the past, 30% of those attending blacked out games were motivated to attend by the blackouts. He wonders if this percentage has decreased so he arranges to poll a random sample of fans at blacked out games and finds that 43 of 166 fans said they were motivated to attend by blackouts. Ho: words: symbols: Ha: words: symbols: 3. The unemployment rate in France is reported by the government in September 2010 to be 10%. Is the employment rate higher than the government is reporting? A random sample of 934 French people showed 12.3% unemployed. Ho: words: symbols: Ha: words: symbols: 4. In a rural area only about 30% of the wells drilled 100 ft or less find water. A local man claims to be able to find water by "dowsing"-waving a forked stick over the ground to detect where a well should be drilled. You check with 80 of his customers and find that 27 have working wells less than 100 feet deep. Ho: words: symbols: Ha: words: symbols: 5. Many people have trouble setting up the features of their cell phones so a company has developed what it hopes will be easier instructions. Their goal is to have no more than 4% of their customers fail to succeed using the new instructions. They test the system on 200 people of whom 12 are unsuccessful. Is this evidence that they failed to meet their goal? Ho: words: symbols: Ha: words: symbols:
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