Free Printable Bio Statistics Review

1.

In the formula for Chi Squared, the E stands for

a)

the sum

b)

the observed frequency

c)

The expected frequency

d)

the p value

2.

In the formula for Chi Squared, the O stands for

a)

the sum

b)

the observed frequency

c)

The expected frequency

d)

the p value

3.

Find the degrees of freedom.

a)

4

b)

5

c)

6

d)

7

4.

The appropriate null hypothesis for performing a chi-square test is that

a)

equal proportions of female and male teenagers are almost certain they will be married in 10 years.

b)

there is no difference between the distributions of female and male teenagers' opinions about marriage in this sample.

c)

there is no difference between the distributions of female and male teenagers' opinions about marriage in the population.

d)

there is no association between gender and opinion about marriage in the sample.

e)

there is no association between gender and opinion about marriage in the population.

5.

Which significance level
(column) do you look at when finding the critical value?

a)

.50

b)

.10

c)

.05

d)

.01

6.

How do you find degrees of freedom?

a)

one less than the possible genotypes

b)

one less than the possible phenotypes

c)

total number divided 2

d)

total number times 2

7.

How do you find critical value?

a)

where degrees of freedom lines up with significance level

b)

where significance level lines up with chi-square

c)

the difference between total and chi-square

d)

degrees of freedom minus significance level

8.

Observed in the wild are 10 circles, 20 squares and 30 triangles. The ratio for this particular population is 2:3:5
observed: 10 circles expected: 12
observed 20 squares expected : 18
observed 30 triangles expected: 30
What is the degrees of freedom?

a)

1

b)

2

c)

3

d)

4

9.

Observed in the wild are 10 circles, 20 squares and 30 triangles. The ratio for this particular population is 2:3:5
observed: 10 circles expected: 12
observed 20 squares expected : 18
observed 30 triangles expected: 30
What is the critical value?

a)

3.841

b)

5.991

c)

7.815

d)

9.488

10.

The average income of families in Barangay Maalat is Php12, 000.00

a)

alternative ; directional

b)

alternative ; nondirectional

c)

null

11.

Giving a Christmas bonus will increase the productivity of employees.

a)

alternative ; directional

b)

alternative ; nondirectional

c)

null

12.

The proportion of housewives using washing machines in Quezon City is less than 50%.

a)

alternative ; directional

b)

alternative ; nondirectional

c)

null

13.

Residents of Sapang Palay commute on an average of 10 kilometres to their place of employment.

a)

alternative ; directional

b)

alternative ; nondirectional

c)

null

14.

This symbol denotes the null hypothesis

a)

Null hypothesis

b)

Alternative Hypothesis

c)

H₀

d)

H_a

15.

This symbol denotes the alternative hypothesis

a)

Null hypothesis

b)

Alternative hypothesis

c)

H₀

d)

H_a

16.

The null and alternative hypothesis can be the same.

a)

Yes

b)

No

c)

Maybe

d)

All the above

17.

Use the notation to state the alternative hypothesis and null hypothesis: "Less than 4% of high school students take Statistics."

a)

H_o: p = 0.04

H_A : p > 0.04

b)

H_o: p = 0.04

H_A : p < 0.04

c)

H_o: p = 0.04

H_A : p ≠ 0.04

d)

H_o: p = 0.04

H_A : p ≤ 0.04

18.

A grocery store announces that the average wage of its employees is $12.50/hour. The claim made would be w=12.50. Is this the null or alternative hypothesis?

a)

null

b)

alternative

19.

Which of the following symbols can be in the ALTERNATIVE hypothesis?

a)

=

b)

>

c)

$\ne$

d)

$\ge$

e)

<

20.

Which of the following symbols can be in the NULL hypothesis? (Select ALL that apply)

a)

=

b)

>

c)

<

d)

$\le$

e)

$\ge$

Bio Statistics Review

Total questions: 20

Worksheet time: 31mins

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