ESTIMAÇÃO DOS PARÂMETROS DE UMA FUNÇÃO DE COVARIÂNCIA NO ESTUDO DA VARIABILIDADE ESPACIAL DO TEOR DE CÁLCIO NO SOLO

A vacuum cleaner is provided which includes a housing and a latch assembly disposed on the housing. The latch assembly includes a latch that is movable relative to the housing between a first state and a second state. The vacuum cleaner also includes a blower that is disposable on the housing and has a first state wherein the blower is detached from the housing and a second state wherein the blower is disposed on the housing. The blower includes a latching surface disposed adjacent the latch with the blower in the second state. The blower moves the latch between the first state and the second state as the blower is moved between the first state and the second state, and the latch engages the latching surface with the blower in the second state and the latch in the first state to secure the blower to the housing.