Answer:
The statistical test to use in comparing the number or words spoken for people with and without licenses is independent sample t test.
Step-by-step explanation:
The sample test to use is an Independent Samples t Test. The reason for using this statistical test is because it takes two independent groups; calculates and compares the means of these groups so as to determine if statistical evidence exists such that the associated population means are significantly different.
In this case, there are two groups of passengers (40, in total);
Group 1 are those who have driving licence while group 2 are those who do not.
Depending on the response from these two groups, the independent sample t test calculates the mean and compares the number or words spoken for people with and without licenses to know passengers experience.
Answer:
8 nickels and 9 dimes
Step-by-step explanation:
If all were dimes, the value would be $1.70. It is $0.40 less than that. Changing a dime for a nickel reduces the value by $0.05, so there must have been $0.40/$0.05 = 8 such changes.
There are 8 nickels and 9 dimes.
_____
<em>Check</em>
8 · 0.05 + 9 · 0.10 = 0.40 + 0.90 = 1.30 . . . the answer checks OK
Answer:
9 have red icing
Step-by-step explanation:
12(3/4)=9
Answer:
Distance between cities MM and NN is 96 miles
Step-by-step explanation:
If a bus leaves city MM and travels at constant speed to city NN and a second bus at the same time leaves city NN and at the same constant speed, then they have to meet at PP (middle point of the distance between MM and NN)
If next day one the buses do the return trip but one is delayed 24 minutes and the other leaves 36 minutes earlier and again they will go at the same constant speed, that means a difference of 1 hour between departures time of buses and at the same time that hour of difference means 24 miles of traveled distance.
As the speed is the same, we conclude buses traveled at 24 miles/h, the point PP (middle point between MM and NN is 48 miles apart from any of the cities and total distance between cities is 96 miles
