It is estimated that 30% of households own a riding lawn mower. A sample of 17 households is studied. What is the mean number of households who own a riding mower?
The expected value would be equal to np=17(0.30)=5.1 households who own a riding mower.
To find the mean number of households who own a riding lawn mower, we need to multiply the estimated percentage by the total number of households in our sample.
First, let's calculate the estimated number of households who own a riding lawn mower: 30% of households owning a mower implies that 0.30 * 17 households own a riding mower.
Next, we can calculate the mean by dividing the estimated number of households who own a riding mower by the total number of households in our sample: (0.30 * 17) / 17.
Simplifying this expression, we find that the mean number of households who own a riding mower is 0.30.
Therefore, the mean number of households who own a riding mower in the given sample is 0.30.