Lesson 1 - Hypothesis Testing

Question 1

is composed of those methods concerned with the analysis of a smaller group of data, which is known as the sample leading to predictions or inferences about the larger set of data

Answer 1

Inferential statistics

Question 2

This type of statistics will be used when one makes a decision, estimates prediction or generalization about a population based on a sample.

Answer 2

Inferential statistics

Question 3

two types of tests in an inferential statistic

Answer 3

Parametric Test and the Non – Parametric Test.

Question 4

A test of significance is appropriate when data represent an interval or ratio scale of measurement and other assumptions have been met.
These include: T-test, Z-test, ANOVA (Analysis of Variance), Linear Regression, Pearson Correlation etch.

Answer 4

Parametric Test

Question 5

A test of significance appropriate when the data represent an ordinal or nominal scale, when a parametric assumption has been greatly violated, or when the nature of distribution is not known.
These include: Chi-square, Kruskal Wallist test, Spearman Rho, Mann-Whitny, Fischer’s Exact Test etch.

Answer 5

Non-parametric Test

Question 6

is a decision-making process for evaluating
claims about a population based on the
characteristics of a sample purportedly coming
from that population.

Answer 6

Hypothesis Testing

Question 7

decision is whether the
characteristic is acceptable or not.

Answer 7

Hypothesis Testing

Question 8

The hypothesis that there is no significant difference between specified populations, any observed difference being due to sampling or experimental error.

Answer 8

Null Hypothesis

Question 9

The hypothesis used in hypothesis testing that is contrary to the null hypothesis.

Answer 9

Alternative Hypothesis

Question 10

When the alternative hypothesis utilizes the ≠ symbol, the test is said to be

Answer 10

Non-directional

Question 11

When the alternative hypothesis utilizes the > or the < symbol, the test is said to be

Answer 11

Directional

Question 12

A non-directional test is also called

Answer 12

Two-tailed test.

Question 13

A directional test is also called

Answer 13

One-tailed test.

Question 14

The probability is found on both tails of the distribution.

Answer 14

Two-tailed

Question 15

Words like decrease, less than, smaller and the like suggest

Answer 15

Left-tailed direction

Question 16

The probability is found at the left- tail of
the distribution.

Answer 16

Left-tailed

Question 17

The probability is found at the right-tail of the distribution.

Answer 17

Right-tailed

Question 18

A gardener claims that his new fertilizer can increase the growth of his plants.

Determine the following statements/questions whether the test is two-tailed or one-tailed and if it is left left-tailed or right-tailed.

Answer 18

One-tailed, right-tailed

Question 19

Teachers believe that playing computer games reduces the academic productivity of the students.

Determine the following statements/questions whether the test is two-tailed or one-tailed and if it is left left-tailed or right-tailed.

Answer 19

One-tailed, left-tailed

Question 20

A researcher wants to test if the collaborative learning approach is effective for the students.

Determine the following statements/questions whether the test is two-tailed or one-tailed and if it is left left-tailed or right-tailed.

Answer 20

Two-tailed

Question 21

Is there any significant increase in the performance of the control group of
respondents?

Determine the following statements/questions whether the test is two-tailed or one-tailed and if it is left left-tailed or right-tailed.

Answer 21

One-tailed, right-tailed

Question 22

Write the null and alternative hypothesis of the following test

The closing time of the SM Supermarket is at 9 pm.

Answer 22

Ho: μ = 9
Ha: μ ≠ 9

Question 23

*Write the null and alternative hypothesis of the following test *

A farmer believes that using organic fertilizers on his plants will yield greater income. His average income in the past was ₱200,000.00 per year.

Answer 23

Ho: μ = ₱200,000.00
Ha: μ > ₱200,000.00

Question 24

*Write the null and alternative hypothesis of the following test *

The owner of a factory that sells a particular bottled fruit juice claims that the average capacity of their product is 250ml. To test the claim, a customer group gets a sample of 100 such bottles, calculates the capacity of each bottle, and then finds the mean capacity to be 248ml.

Answer 24

Ho: μ = 250
Ha: μ < 250

Question 25

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Some researchers claim that social mobility is declining.

Determine the following statements/questions whether the test is two-tailed or one-tailed and if it is left left-tailed or right-tailed.

Answer 25

One-tailed, left-tailed

Question 26

A nutritionist claims that her developed bread is fortified with vitamin B.

Determine the following statements/questions whether the test is two-tailed or one-tailed and if it is left left-tailed or right-tailed.

Answer 26

One-tailed, right-tailed

Question 27

A scientist wants to test the effect of nicotine on our bodies.

Determine the following statements/questions whether the test is two-tailed or one-tailed and if it is left left-tailed or right-tailed.

Answer 27

Two-tailed

Question 28

A musicians believe that listening to classical music affects mood.

Determine the following statements/questions whether the test is two-tailed or one-tailed and if it is left left-tailed or right-tailed.

Answer 28

Two-tailed

Question 29

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A storekeeper thinks that time of day influences the sale of ice cream.

Determine the following statements/questions whether the test is two-tailed or one-tailed and if it is left left-tailed or right-tailed.

Answer 29

Two-tailed