Question
In: Statistics and Probability
A researcher thinks the proportion of breakdowns for cars is different for different colors of cars....
A researcher thinks the proportion of breakdowns for cars is different for different colors of cars. In order to support his theory, He collects the following data from an auto repair shop:
| red | white | blue | black | metallic | |
| observed | 19 | 21 | 25 | 18 | 27 |
| expected |
Using a chi-square goodness of fit test, is this evidence significant at ?
State hypotheses, report test statistic and p-value and a conclusion.
Solutions
orchestra answered 2 years agoRelated Solutions
A researcher believes that the proportion of male high school seniors who have their own cars...
A researcher believes that the proportion of male high school
seniors who have their own cars is higher than the proportion of
female high school seniors who have their own cars. In a sample of
35 male high school seniors 20 had their own cars. In a sample of
40 female high school seniors, 20 had their own cars. At α = 0.05,
test the researchers claim using the five step testing method.
15. A candy company makes five different colors of candies. Find the sample proportion of candies...
15. A candy company makes five different colors of candies. Find
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test the claim that 15% of the company's candies are green. Use
the data in the table below, the P-value method, and a
significance level of 0.025.
What are the null and alternative hypotheses?
A. H 0 : p ≠ 0.15
H 1 : p = 0.15
B.H 0 : p > 0.15
H 1 : p...
Color blindness is the decreased ability to see colors and clearly distinguish different colors of the...
Color blindness is the decreased ability to see colors and
clearly distinguish different colors of the visible spectrum. It is
known that color blindness affects 11% of the European population.
A sample of 12 subjects is taken for research purposes by a team of
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What is the probability that one subject is color blind?
What is the probability that more than one subject is color
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What is the probability that at most 3 subjects are color
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What...
A student researcher compares the ages of cars owned by students and cars owned by faculty...
A student researcher compares the ages of cars owned by students
and cars owned by faculty at a local state college. A sample of
212212 cars owned by students had an average age of 8.588.58 years.
A sample of 180180 cars owned by faculty had an average age of
8.958.95 years. Assume that the population standard deviation for
cars owned by students is 2.292.29 years, while the population
standard deviation for cars owned by faculty is 3.583.58 years.
Determine the...
A student researcher compares the ages of cars owned by students and cars owned by faculty...
A student researcher compares the ages of cars owned by students
and cars owned by faculty at a local state college. A sample of 104
cars owned by students had an average age of 5.42 years. A sample
of 145 cars owned by faculty had an average age of 5.57 years.
Assume that the population standard deviation for cars owned by
students is 2.69 years, while the population standard deviation for
cars owned by faculty is 2.46 years. Determine the...
A student researcher compares the ages of cars owned by students and cars owned by faculty...
A student researcher compares the ages of cars owned by students
and cars owned by faculty at a local state college. A sample of 76
cars owned by students had an average age of 8.72 years. A sample
of 119 cars owned by faculty had an average age of 8.95 years.
Assume that the population standard deviation for cars owned by
students is 3.64 years, while the population standard deviation for
cars owned by faculty is 3.51 years. Determine the...
A student researcher compares the ages of cars owned by students and cars owned by faculty...
A student researcher compares the ages of cars owned by students
and cars owned by faculty at a local state college. A sample of 233
cars owned by students had an average age of 6.62 years. A sample
of 280 cars owned by faculty had an average age of 7.94 years.
Assume that the population standard deviation for cars owned by
students is 2.13 years, while the population standard deviation for
cars owned by faculty is 3.14 years. Determine the...
A student researcher compares the ages of cars owned by students and cars owned by faculty...
A student researcher compares the ages of cars owned by students
and cars owned by faculty at a local state college. A sample of 217
cars owned by students had an average age of 7.62 years. A sample
of 252 cars owned by faculty had an average age of 6.266.26 years.
Assume that the population standard deviation for cars owned by
students is 2.67 years, while the population standard deviation for
cars owned by faculty is 3.41 years. Determine the...
A student researcher compares the ages of cars owned by students and cars owned by faculty...
A student researcher compares the ages of cars owned by students
and cars owned by faculty at a local state college. A sample of 78
cars owned by students had an average age of 5.04 years. A sample
of 118 cars owned by faculty had an average age of 8 years. Assume
that the population standard deviation for cars owned by students
is 3.06 years, while the population standard deviation for cars
owned by faculty is 3.24 years. Determine the...
State the null and alternative hypotheses for each conjecture. a. A researcher thinks that if expectant...
State the null and alternative hypotheses for each
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a. A researcher thinks that if expectant mother use vitamin
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birth weight of the population is 8.6 pounds.
b. An engineer hypothesizes that the mean number of defects can
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defective disks per 1000 is 8.
c. A psychologist...
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