(Round all intermediate calculations to at least 4 decimal places.) Consider the
ID: 3323956 • Letter: #
Question
(Round all intermediate calculations to at least 4 decimal places.)
Consider the following hypotheses:
The population is normally distributed. A sample produces the following observations:
Use the critical value approach to conduct the test at a 1% level of significance. Use Table 2.
Find the mean and the standard deviation. (Round your answer to 2 decimal places.)
Calculate the value of the test statistic. (Negative value should be indicated by a minus sign. Round your answer to 2 decimal places.)
Calculate the critical value of the test statistic. (Negative value should be indicated by a minus sign. Round your answer to 3 decimal places.)
(Round all intermediate calculations to at least 4 decimal places.)
Consider the following hypotheses:
Explanation / Answer
The statistical software output for this problem is:
One sample T hypothesis test:
: Mean of variable
H0 : = 80
HA : < 80
Hypothesis test results:
Hence,
a) Mean = 69
Standard deviation = 7.75
b) Test statistic = -3.48
c) Critical value = -3.365
d) Reject H0 since the value of the test statistic is less than the negative critical value.
Option C is correct.
Variable Sample Mean Std. Err. DF T-Stat P-value Data 69 3.1622777 5 -3.4785054 0.0088Related Questions
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