ISDS HW assignment 5 question

YOUR FULL NAME:   

  Answer Optional for Partial Credit
1.  [6 pts.] We have evidence to believe that variances are equal (True/False):
 
F = 

   p-value =  

2.  [12 pts.]
 a. Eq. vars  = 
Uneq. vars numerator = 

  Uneq. vars  = 
Uneq. vars denominator = 

     
 b. Eq. vars  = 
Uneq. vars numerator = 

  Uneq. vars  = 
Uneq. vars denominator = 

     
 c. Eq. vars  = 
Uneq. vars numerator = 

  Uneq. vars  = 
Uneq. vars denominator = 

     
 d. Eq. vars  = 
Uneq. vars numerator = 

  Uneq. vars  = 
Uneq. vars denominator = 

     
 
  
3.  [12 pts.]
  The manager should hire a security guard (TRUE or FALSE):
 
Equal variances: 
   F =  

   p-value = 

   Variances are equal (True/False): 

   Two-Sample Test: 
   t= 

   p-value= 

4.  [12 pts.]
  Americans are more deeply in debt this year (True or False):
 
This is a right-tailed t-test (True or False): 

   Hypothesized Mean Difference: 

   t= 

   p-value= 

5.  [18 pts.]  
 a. p-value= 
x1 = 

    x2 = 

    p ̂ = 

    Numerator of z = 

    Denominator of z = 

    z = 

    this is a two-tailed test (TRUE or FALSE): 

 b. p-value= 
x1 = 

    x2 = 

    p ̂ = 

    Numerator of z = 

    Denominator of z = 

    z = 

    this is a two-tailed test (TRUE or FALSE): 

 c. p-value decreases because standard error decreases as sample sizes increase (TRUE or FALSE):