Question

- A simple random sample of 25 filtered 100 mm cigarettes is obtained and the tar content of each cigarette is measured. The sample has a mean of 15 mg and a standard deviation of 4 mg. Use a 0.05 significance level to test the claim that the mean tar content of filtered 100 mm cigarettes is less than 20 mg, which is the mean for unfiltered king size cigarettes. What do the results suggest about the effectiveness of the filters?

(The critical value of ? for
*α**=0.05* (single tail) and 24 d.f is
*-*1.711)

Answer #1

5. A simple random sample of 25 filtered 100 mm cigarettes is
obtained, and the tar content of each cigarette is measured. The
sample has a mean of 13.2 mg and a standard deviation of 3.7 mg.
Use a 0.05 significance level to test the claim that the mean tar
content of filtered 100 mm cigarettes is less than 21.1 mg, which
is the mean for unfiltered king size cigarettes.
6. The heights are measured for the simple random sample...

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A simple random sample of
29
filtered 100-mm cigarettes is obtained from a normally
distributed population, and the tar content of each cigarette is
measured. The sample has a standard deviation of
0.20
mg. Use a
0.05
significance level to test the claim that the tar content of
filtered 100-mm cigarettes has a standard deviation different
from
0.30
mg, which is the standard deviation for unfiltered king-size
cigarettes. Complete parts (a) through (d) below.

hey
simple random sample of 25 filtered 100 in in cigarettes is at 10
and the tar content of each cigarette is measured the sample has a
mean of 19.2 MG in a standard deviation of 3.29 MG you say 0.05
significance level to test the claim that the mean tar content of
filtered hundred MM cigarettes is less than 21.1 MG which is the
main for unfiltered king-size cigarettes assume that the simple
random sample has been selected for...

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standard deviation different from 0.35 mg, which is the standard
deviation for unfiltered king-size cigarettes. Complete parts (a)
through (d) below.
a) find the test statistic.
b) find...

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Use a 0.05 significance level to...

Assume that a simple random sample has been selected from a
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Assume that a simple random sample has been selected from a
normally distributed population and test the given claim. Identify
the null and alternative hypotheses, test statistic, P-value, and
state the final conclusion that addresses the original claim. A
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