Answer:
: P=0.60
: P>0.60
Step-by-step explanation:
Hypothesis test requires to state a null hypothesis and an alternative hypothesis. The hypotheses are stated in such a way that they are mutually exclusive. That is, if one is true, the other must be false; and vice versa. Then sample data will be used to accept or reject the null hypothesis in a given significance level.
Let P be the true proportion of customers that are carrying two Wi-Fi devices.
We can state the null and alternative hypothesis as follows:
: P=0.60
: P>0.60
Before conducting the test, we need to check if n×0.06≥10
Since n=78 this condition holds, therefore we can apply the hypothesis test.
Answer:
9.5
Step-by-step explanation:
4.6+4.9= 9.5
Answer: a) A(t)= $500(1.055)^t
b) Amount after 9 years A(9) = $809.55
Amount after 17 years A(17) = $1242.40
Step-by-step explanation: shown in the attachment.
Answer:
7.5mph
Step-by-step explanation:
Speed = Distance / Time
Speed = 15 ÷ 2
Speed = 7.5 mph
Answer:
Teacher is 27 years old
Step-by-step explanation:
(1/2)(t - 3) = (1/3)(t + 9)
multiply by 6 to clear the fraction
3(t - 3) = 2(t + 9)
Distribute
3t - 9 = 2t + 18
Subtract 2t from both sides
t - 9 = 18
Add 9 to both sides
t = 27
Teacher is 27 years old