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It is claimed that the proportion of people who write with their left hand is equal to 0.1.

Let p be the population proportion of people who write with their left hand.

The hypotheses for the stated claim are as follows.

Null hypothesis $H_0:p=0.1$

Alternative hypothesis$H_A:p鈮�0.1$

The two types of errors made while conducting hypotheses tests are defined below.

Type I error: Rejecting the null hypothesis when the null hypothesis is true is a type I error and is denoted by $伪$.

Type II error: Failing to reject the null hypothesis when the null hypothesis is false is a type II error and is denoted by $尾$.

In accordance with the given claim, the following statements define the type I error and the type II error:

Type I error: When the actual value of the proportion is equal to 0.1, and the researcher rejects the claim $p=0.1$, a type I error is made.

Type II error: When the actual value of the proportion is not equal to 0.1, and the researcher fails to reject the claim $p=0.1$, a type II error is made.