Question

Hypothesis Test for Two Populations including

- t-Test for μ
_{1}-μ_{1} - t-Test for μd
- F-Test for

A real estate company is interested in testing whether, on average, families in Gotham have been living in their homes different amounts of time than families in Metropolis have. Random samples yield the following results. Assuming equal variances and normal distributions. What is the value of the pooled variance estimate?

Gotham | Metropolis | |

number sampled: | 100 | 150 |

Average: | 35 months | 45 months |

Standard deviation: | 20 months | 25 months |

Group of answer choices

a. 512.5

b. 253.13

c. 539.31

d. 535.18

Answer #1

TABLE 10-4
A real estate company is interested in testing whether, on average,
families in Gotham have been living in their current homes for less
time than families in Metropolis have. Assume that the two
population variances are equal. A random sample of 100 families
from Gotham and a random sample of 150 families in Metropolis yield
the following data on length of residence in current homes.
Gotham: G = 35 months,
sG2 = 900 Metropolis:
M = 50 months,...

T F 1. A p-value of .008 in hypothesis testing means there is
only a .8% chance we could get such sample statistics from the
population if the null hypothesis is as stated. Such an event is
considered unlikely and we would reject the null hypothesis.
T F 2. As a general rule in hypothesis testing, it is always
safer to set up your alternate hypothesis with a greater-than or
less-than orientation.
_____3. If the level of significance is .02...

Multiple Choice Questions
Q1. In a hypothesis test, Beta is best described
by
P (Type I error)
P (Test Stat>|Observed Stat|)
Power
P (Type II error)
Q2. Which alternative hypothesis would I need
to double the p-value in a test for the mean?
No feasible answer
Lower tailed alternative
Two sided alternative
Upper tailed alternative
Suppose our p-value is .184. What will our conclusion be
at alpha levels of .10, .05, and .01?
We will reject Ho at alpha=.10 or...

MATHEMATICS
1. The measure of location which is the most likely to
be
influenced by extreme values in the data set is the a. range
b.
median c. mode d. mean
2. If two events are independent, then a. they must be
mutually
exclusive b. the sum of their probabilities must be equal to one
c.
their intersection must be zero d. None of these alternatives
is
correct. any value between 0 to 1
3. Two events, A and B,...

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