How to generate a random number in a particular range

The following error was displayed when execute your suggest code. What should I do?

groovy.lang.MissingMethodException: No signature of method: com.eviware.soapui.impl.wsdl.teststeps.WsdlPropertiesTestStep.setPropertyValue() is applicable for argument types: (java.lang.String, java.lang.Double) values: {"randomValue", 5.3027697549785975}