Table $28-1$

Sample Population

$\backslash$table$[[$Person$,$Status$],[$Allen$,$Unpaid stay at home dad. Has not looked for a job in several years.$],[$Ben$,$College president.$],[$Allison$,$Part$-$time welder. Actively looking for full time work.$],[$Brittany$,$Self$-$employed full$-$time wedding singer$.],[$Cathy$,$Full$-$time physician's assistant.$],[$Calvin$,$Retired finance professor. Last applied for work $10$ weeks ago.$],[$Diane$,$Laid$-$off fork$-$lift operator expecting to be recalled.$],[$David$,$Works for a bicycle store. Age $70.],[$Evelyn$,$Manager of health food store.$],[$Eli$,$Museum guard. Was not at work last week due to illness.$],[$Flora$,$Has never been employed. Looked for a job last week.$],[$Frank$,$Fired from job as an investment banker. Last looked for work three weeks$]]$

Refer to Table $28-1.$ How many in the sample are in the labor force?

$8$

$11$

$10$

$9$