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For the following conjecture, determine what would the null and alternative hypotheses be.
Conjecture: The average age of community college students is 24.6 years.
a)
b)
c) 24.6">
d)
e)
f)
The null hypothesis is
The alternative hypothesis is
Flag this QuestionQuestion 21 pts
For the following conjecture, determine what would the null and alternative hypotheses be.
Conjecture: The majority of college students have credit cards.
a)
b)
c) 0.5">
d)
e)
f)
The null hypothesis is
The alternative hypothesis is
Flag this QuestionQuestion 31 pts
For the following conjecture, determine what would the null and alternative hypotheses be.
Conjecture: The average pulse of male marathon runners is less than 70 beats per minute.
a)
b)
c) 70">
d)
e)
f)
The null hypothesis is
The alternative hypothesis is
Flag this QuestionQuestion 41 pts
For the following conjecture, determine what would the null and alternative hypotheses be.
Conjecture: The proportion of homes with extinguishers is 0.80.
a)
b)
c) 0.80">
d)
e)
f)
The null hypothesis is
The alternative hypothesis is
Flag this QuestionQuestion 51 pts
Find the critical value(s), assuming that the normal distribution applies.
Two-tailed test, alpha = 0.01
a)
b)
c)
d)
e)
f)
The critical value(s) is
Flag this QuestionQuestion 61 pts
Find the critical value, assuming that the normal distribution applies.
Right-tailed test, alpha = 0.02
a)
b)
c)
d)
e)
f)
The critical value(s) is
Flag this QuestionQuestion 71 pts
Find the critical value, assuming that the normal distribution applies.
Alpha = 0.005
a)
b)
c)
d)
e)
f)
The critical value(s) is
Flag this QuestionQuestion 81 pts
The critical region is defined by the critical values . The value of the statistic is 1.8. Would you reject or fail to reject the hypothesis?
Flag this QuestionQuestion 91 pts
The critical region is defined by the critical value -2.33. The test statistic value is -1.7. Would you reject or fail to reject the hypothesis?
Flag this QuestionQuestion 101 pts
If
,
then the test we use for hypothesis testing is
Flag this QuestionQuestion 111 pts
If
, 0.2">
then the test we use for hypothesis testing is
Flag this QuestionQuestion 121 pts
Use the given information to find the p-value: the test statistic is a left-tailed test and z=-1.25 (normal distribution).
Round your answer to nearest thousandths.
Flag this QuestionQuestion 131 pts
Use the given information to find the p-value: the test statistic is a two-tailed test and z=-2.75 (normal distribution).
Round your answer to nearest thousandths.
Flag this QuestionQuestion 141 pts
Use the given information to find the p-value: the test statistic is z=2.30 (normal distribution) and
0.7">
Round your answer to nearest thousandths.
Flag this QuestionQuestion 151 pts
If p-value is 0.001 and would you [decision]
Flag this QuestionQuestion 161 pts
If p-value is 0.07 and would you [decision]
Flag this QuestionQuestion 171 pts
The dean of CCP wants to determine whether the mean starting salary of graduates of the is greater than $40000. She will perform the test with the following hypotheses:
40000">
Suppose that the true mean is $40000 and the dean rejects the null hypothesis. Is this
a) correct decision
b) Type I error
c) Type II error
Flag this QuestionQuestion 181 pts
The dean of CCP wants to determine whether the mean starting salary of graduates of the is greater than $40000. She will perform the test with the following hypotheses:
40000">
Suppose that the true mean is $50000 and the dean rejects the null hypothesis. Is this
a) correct decision
b) Type I error
c) Type II error
Flag this QuestionQuestion 191 pts
The dean of CCP wants to determine whether the mean starting salary of graduates of the is greater than $40000. She will perform the test with the following hypotheses:
40000">
Suppose that the true mean is $50000 and the dean does not reject the null hypothesis. Is this
a) correct decision
b) Type I error
c) Type II error
Flag this QuestionQuestion 201 pts
A test of hypotheses versus was performed. The p-value was 0.027. Fill in the blank: If , then the probability of observing a test statistic as extreme as or more extreme than actually observed is
Flag this QuestionQuestion 211 pts
A hypothesis test result in a p-value of 0.007. Which is the best conclusion?
Flag this QuestionQuestion 221 pts
We never conclude that null hypothesis is true.
Flag this QuestionQuestion 231 pts
When we reject a null hypothesis, we are certain that the alternative hypothesis is true.
Flag this QuestionQuestion 241 pts
If a null hypothesis is rejected with a significance level of 0.05, it is also rejected with a significance level of 0.01?
Flag this QuestionQuestion 251 pts
If a null hypothesis is rejected with a significance level of 0.01, it is also rejected with a significance level of 0.05?
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