1.A university deems courses with an average final grade less than 65% as exhibiting sub par performance and in need of intervention. It is found that in a sample of 61 second-year economics students that the average final mark is 63, with a variance of 18.
At alpha = 0.01 test if the population mean, mu , might truly be less than 65 or not.
We will follow standard five step process
This is an example of:
A. population
B. estimation of a sample parameter
C. left sided test
D. right sided test
E. two-sided test
2. A university deems courses with an average final grade less than 65% as exhibiting sub par performance and in need of intervention. It is found that in a sample of 61 second-year economics students that the average final mark is 63, with a variance of 18.
At alpha = 0.01 test if the population mean, mu , might truly be less than 65 or not.
We will follow standard five step process
Step 1: The null hypothesis is stated as...
A. H0 : mu <= 65
B. H0 : mu ̸= 65
C. H0 : mu = 63
D. H1 : mu = 63
E. H0 : mu = 65
3. A university deems courses with an average final grade less than 65% as exhibiting sub par performance and in need of intervention. It is found that in a sample of 61 second-year economics students that the average final mark is 63, with a variance of 18.
At alpha = 0.01 test if the population mean, mu , might truly be less than 65 or not.
We will follow standard five step process
Step 2: The alternative hypothesis is stated as... (hint based on the 5-step process)
A. H1 : mu = 63
B. H0 : mu ̸= 65
C. H1 : mu < 65
D. H1 : mu ̸= 63
E. none of the answers listed
4. university deems courses with an average final grade less than 65% as exhibiting sub par performance and in need of intervention. It is found that in a sample of 61 second-year economics students that the average final mark is 63, with a variance of 18.
At alpha = 0.01 test if the population mean, mu , might truly be less than 65 or not.
We will follow standard five step process
The t-test statistic is...?
5. A university deems courses with an average final grade less than 65% as exhibiting sub par performance and in need of intervention. It is found that in a sample of 61 second-year economics students that the average final mark is 63, with a variance of 18.
At alpha = 0.01 test if the population mean, mu , might truly be less than 65 or not.
The critical value is..?