Answer:
There is a 10% chance of the mean oil-change time of 20.53 minutes
Explanation:
Given that:
There are 45 oil changes between 10
a.m. and 12 p.m. treating this as a random sample, n = 45 and there would be a 10% chance of the mean oil-change time, therefore P = 10% = 0.1
A probability of 0.1 gives a corresponding z score of -1.28, this is gotten from the z table. z = -1.28
z score (z) = (x - mean) / (standard deviation / √n)
Let us assume mean = 21.2 minutes and standard deviation = 3.5 minutes. substituting values:
-1.28 = (x - 21.2)/(3.5 ÷ √45)
-1.28 = (x - 21.2) / 0.522
x - 21.2 = -0.6678
x = 21.2 - 0.6678 = 20.53
x = 20.53
Answer:
b.
Explanation:
According to the music market study conducted by Matthew Salganik, Peter Dodds, and Duncan Watts demonstrated that group influence shapes our personal taste and decisions regarding music. Just like in high school, groups have the ability to influence other peoples decisions. Especially those who look to those groups as superior. Which was demonstrated by the study mentioned in the question in regards to music.
<span>Most would refer to it as a "Bear" market, as opposed to a "Bull" market when stocks are steadily increasing. </span>
Answer:
Credit cards are neither good nor bad. They are financial tools that must be used with care. Cards can help or hurt your finances if you don't use them responsibly. At the same time, credit cards used properly offer a convenient payment method that can build credit and earn rewards for users.
Explanation:
False. The stock market is essential to the economy. The Great Depression is a prime example.
