Answer:
a
[tex]z_t = -1.645[/tex]
b
We should reject the Upper [tex]H_o[/tex]
Step-by-step explanation:
From the question we are told that
The test statistics is [tex]t_s = -3.43[/tex]
The probability is [tex]p < 0.39[/tex]
The level of significance is [tex]\alpha = 0.05[/tex]
Now looking at the probability we can deduce that this is a left tailed test
The second step to take is to obtain the critical value of [tex]\alpha[/tex] from the critical value table
The value is
[tex]t_ {\alpha } = 1.645[/tex]
Now since this test is a left tailed test the critical value will be
[tex]z_t = -1.645[/tex]
This because we are considering the left tail of the normal distribution curve
Now since the test statistics falls within the critical values the Null hypothesis is been rejected
