## Elementary Statistics (12th Edition)

a) Voluntary response data is not a simple random sample, but a convenience sample, hence it is false. b) The requirement for a sample to be considered large is that it contains $30$ or more matched pairs, hence it is false. c) The sample is small (less than $30$), the data need to be approximately normally distributed, hence it is true. d) Women from Texas and Utah are not matched, hence it is false.. e)The confidence interval is one-sided and then the confidence level is $1$ minus by twice the significance level, hence it is true.