Statistics in Sensory Analysis

Question 1

What is Statistical Hypothesis Testing?

Answer 1

Often the objective of an investigation is to determine if it is reasonable to assume that the unknown value of a parameter is equal to some specified value or possibly that the unknown values of two parameters is equal to each other. In the face of the incomplete and variable information contained in a sample, statistical decisions of this type are made using hypothesis testing.

Question 2

Which is the mathematical statement of the objective of investigation?

Answer 2

The Null Hypothesis

Question 3

1 step of the process of statistical hypothesis testing?

Answer 3

The objective of the investigation is stated in mathematical terms, called the null hypothesis (H0)

Question 4

2 step of the process of statistical hypothesis testing?

Answer 4

Based on the prior interest of the researcher, another mathematical statement called the alternative hypothesis (Ha) is formulated

Question 5

3 step of the process of statistical hypothesis testing?

Answer 5

A sample of elements from the population is collected and the measurement of interest is taken on each element of the sample.

Question 6

4 step of the process of statistical hypothesis testing?

Answer 6

The value of the statistic used to estimate the parameters of interest is calculated

Question 7

5 step of the process of statistical hypothesis testing?

Answer 7

Based on the assumed probability distribution of the measurement and the null hypothesis assumption, the probability that the statistics takes on the value calculated in step 4 is computed, If this probability is smaller than some predetermined value, the null hypothesis is rejected in favor of alternative hypothesis.