Question
In: Statistics and Probability
A random sample of 400 adolescents in Chicago found 180 prefer sugary candy (Skittles, Starburst, Lemon...
A random sample of 400 adolescents in Chicago found 180 prefer sugary candy (Skittles, Starburst, Lemon Heads, etc.) to chocolate candy. A nutritionist believes fewer adolescents prefer sugary candy to chocolate (i.e. less than 50%).
(a) Is there evidence at the 5% significance level to support the belief of the nutritionist.?
(b) Interpret the P-value in the context of this test.
(c) Explain what a Type I error would mean in the context of this test.
(d) Explain what a Type II error would mean in the context of this test.
Solutions
orchestra answered 1 year agoRelated Solutions
The quality control manager of a candy bar factory obtains a random sample of 10 candy...
The quality control manager of a candy bar factory obtains a
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Determine the Lower and Upper Fence and make your decision based on
these measures.
To test Ho: ? = 400 versus H1: ? > 400, a simple random sample of...
To test Ho: ? = 400 versus H1: ? > 400, a simple random
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A random sample of 400 men and 400 women was randomly selected and asked whether they...
A random sample of 400 men and 400 women was randomly selected
and asked whether they planned to attend a concert in the next
month. The results are listed below. Perform a homogeneity of
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Use α = 0.04.
men
women
plan...
A random sample of 40 bags of flour is weighed. It is found that the sample...
A random sample of 40 bags of flour is weighed. It is found that
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have a population standard deviation of 5.42 grams. What is the
lower limit of an 80% confidence interval for the population mean
weight?
Select one:
A. No solution
B. 451.983 grams
C. 452.360 grams
D. 452.405 grams
After interviewing a sample of 100 residents of New Taipei City,
you find that the mean...
A random sample of 40 bags of flour is weighed. It is found that the sample...
A random sample of 40 bags of flour is weighed. It is found that
the sample mean is 453.08 gram. All weights of the bags of flour
have a population standard deviation of 5.42 gm. What is the lower
confidence limit (LCL) of an 80% confidence interval for the
population mean weight?
Given the following hypotheses: H0: μ = 400 H1: μ ≠ 400 A random sample of...
Given the following hypotheses:
H0: μ = 400
H1: μ ≠ 400
A random sample of 12 observations is selected from a normal
population. The sample mean was 407 and the sample standard
deviation 6. Using the 0.01 significance level:
State the decision rule. (Negative amount should be
indicated by a minus sign. Round your answers to 3 decimal
places.)
Compute the value of the test statistic. (Round your
answer to 3 decimal places.)
What is your decision regarding the...
3) A random sample of ?? = 11 in Chicago gave the following information concerning violent...
3) A random sample of
?? = 11 in Chicago gave the following information concerning
violent crime rates (per million population): ?? = 3.42 and ?? =
0.79. Another random sample of ?? = 14 in Las Vegas gave the
following information concerning violent crime rates: ?? = 3.77 and
?? = 0.92. Do the data indicate that violent crime rate in Chicago
is higher than that in Las Vegas? Use a 1% level of
significance.
Step One: State the...
the random sample of 400 people is selected and the populatin is .29 a. describe the...
the
random sample of 400 people is selected and the populatin is .29
a. describe the sample distribution of the sample
proportion
b. find the probability of obtaining the sample proportion is
greater than .33
c. find the sample portion that has the top 7%
A survey of 1000 air travelers found that 60% prefer a window seat. The sample size...
A survey of 1000 air travelers found
that 60% prefer a window seat. The sample size is large enough to
use the normal distribution and a bootstrap distribution shows that
the standard error is SE = 0.015. Use a normal distribution to find
and interpret a 99% confidence interval for the proportion of air
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enough to use...
A simple random sample of size n is drawn. The sample mean is found to be...
A simple random sample of size n is drawn. The sample mean is
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A). Construct a 95% confidence interval about if the sample
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