Answer:
Part a: The correct answer is A, reject H0 because p value is less than . Part B: The correct answer is C, the percentage of adults that would erase their personal information online if they could is more than 51%.
Step-by-step explanation:
part a. The essential idea of hypothesis testing in statistics is to evaluate the probability p (p value) of some representative parameter, compared to a level of likelihood that is set before starting the test (). In this case, we are interested in a level of likelihood , which means that if the probability of the parameter is less than 5%, we will reject the hypothesis that this parameter is representing, since it's so unlikely. Of course, the significance level is arbitrary and must be payed attention, according to the particular situation. Therefore, the correct anser is A.
part b. Since we rejected the hypothesis to a 5% significance level, we reject the fact that less than 51% of adults would erase their personal information online if they could. This is equivalent to saying that a percentage of adults equal to or more than 51% would erase their personal information if they could, which is answer C.
Answer:
The Escobar family's sprinkler was was used for 14 hours and the Johnson's for 18 hours.
Step-by-step explanation:
I am going to solve this question by a system of equations.
We have that:
x is the number of hours that the Escobar's sprinkler was used.
y is the number of hours that the Johnsons' sprinkler was used.
The families used their sprinklers for a combined total of 32 hours
This means that
Total water output of 1320 gallons.
Escobar 30 gallons a hour, Johnson 50. So
From the first equation
The Escobar family's sprinkler was was used for 14 hours and the Johnson's for 18 hours.