ISDS HW assignment

YOUR FULL NAME:

Andrew Cox

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 =

=

Numerator of z =

Denominator of z =

z =

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

b.

p-value=

x1 =

x2 =

=

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):