The β-actin gene is proposed to be used in the normalization as a housekeeping gene. This gene is assumed to be expressed at approximately constant levels throughout the body. A number of 5 tissues have been randomly chosen to investigate the expression level of this gene. The expression level was measured five times in each tissue. The measurements of the gene expression levels provided the following data:
Can the β-actin gene be used as housekeeping gene for normalization purposes?