Question

Consider a drug testing company that provides a test for marijuana usage. Among 305 tested subjects, results from 26 subjects were wrong (either false positive or a false negative) Use a .5 significance level to test the claim that less than 10% of the test results are wrong. Identify the test statistic and the P value for this hypothesis test.

Answer #1

Solution :

Given that,

Point estimate = sample proportion = = x / n = 0.085

This a left (One) tailed test.

The null and alternative hypothesis is,

Ho: p = 0.10

Ha: p < 0.10

Test statistics

z = ( - ) / *(1-) / n

= ( 0.085 - 0.10) / (0.10*0.90) /305

**= -0.873**

P-value = P(Z < z )

= P(Z < -0.873 )

**= 0.1913**

The p-value is p = 0.1913, and since p = 0.1913 < 0.5, it is concluded that the null hypothesis is rejected.

**There is sufficient evidence to claim that less than 10%
of the test results are wrong.**

Consider a drug testing company that provides a test for
marijuana usage. Among 309 tested subjects, results from 27
subjects were wrong (either a false positive or a false
negative). Use a 0.05 significance level to test the claim that
less than 10 percent of the test results are wrong.
Identify the test statistic for this hypothesis
test.
The test statistic for this hypothesis test
is:
(Round to two decimal places as needed.)

Consider a drug testing company that provides a test for
marijuana usage. Among
287
tested subjects, results from
26
subjects were wrong (either a false positive or a false
negative). Use a
0.10
significance level to test the claim that less than
10
percent of the test results are wrong.

Consider a drug testing company that provides a test for
marijuana usage. Among 257 tested subjects, results from 28
subjects were wrong (either a false positive or a false negative).
Use a 0.05 significance level to test the claim that less than 10
percent of the test results are wrong.
Identify the null and alternative hypotheses for this test.
Choose the correct answer below. ( Round to two decimal places as
needed )
Identify the P-value for this hypothesis test....

The company Drug Test Success provides a “1-Panel-THC” test for
marijuana usage. Among 300 tested subjects, results from 27
subjects were wrong (either a false positive or a false negative).
Use a 0.05 significance level to test the claim that over 90% of
the test results are correct.
1.Find the value of pp that should be used in this
test, based on the sample data.
2.What is the value of the test statistic, written to three
decimal places?
3.What is...

Consider a drug testing company that provides a test for
marijuana usage. Among 291tested subjects, results from 27subjects
were wrong (either a false positive or a false negative). Use a
0.05 significance level to test the claim that less than 10 percent
of the test results are wrong.
Identify the null and alternative hypotheses for this test.
Choose the correct answer below.
A.
Upper H 0
:
pless than
0.1
Upper H 1
:
pequals
0.1
B.
Upper H 0...

12. A drug testing facility claims to have a test for marijuana
that is 90% reliable. In a random sample of 500 people, 67 were
falsely identified. Use a 0.05 significance level to check the
claim that less than 10% of the test results are wrong.
a. State the H0 and H1 hypothesis:
b. Find the critical value.
c. What is the test statistic?
d. What is the P-Value?
e. Does this test appear to be reliable enough for Traffic...

Use the following results from a test for marijuana use, which
is provided by a certain drug testing company. Among
149 subjects with positive test results, there are 21 false
positive results; among 155
negative results, there are 5 false negative results. If one of
the test subjects is randomly selected, find the probability that
the subject tested negative or did not use marijuana. (Hint:
Construct a table.)
The probability that a randomly selected subject tested negative
or did not...

Use the following results from a test for marijuana use, which
is provided by a certain drug testing company. Among 150 subjects
with positive test results, there are 22 false positive results.
Among 160 negative results, there are 2 false negative results.
Complete parts (a) through (c). (Hint: Construct a table.)
a. How many subjects were included in the study? The total
number of subjects in the study was nothing .
b. How many subjects did not use marijuana? A...

Use the following results from a test for marijuana use, which
is provided by a certain drug testing company. Among 142 subjects
with positive test results, there are 20 false positive results.
Among 154 negative results, there are 5 false negative
results.
a. How many subjects were included in the study ?
The total number of subjects in the study was:
b. How many subjects did not use marijuana?
A total of _ subjects did not use marijuana.
c. What...

In Exercises 23-26, use these results from the
I-Panel-THC .est for marijuana use, which is provided by the
company Drug test Sucess: Among 143 subjects with positive test
results, there are 24 false positive results 157 negative results,
there are 3 false negative reslts( Hint: Construct a table similar
to table 4-1, which is included with the chapter problem.
23. screening for marijuana. Use If 2 of the subjects are
randomly selected without replaement. what is the probaility tha
they...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 11 minutes ago

asked 21 minutes ago

asked 33 minutes ago

asked 53 minutes ago

asked 58 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago