a car dealership sells 48 cars of the same model in one month. the average price of each car is $25,000 with a maximum variance
1 answer:
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Answer:
<h2>a = 3</h2>Step-by-step explanation:
The slope of a line given two points can be found by using the formula
From the question the slope is - 3
To find the value of a we have
Divide both sides by - 3
We have the final answer as
<h3>a = 3</h3>Hope this helps you
Answer:
We need to conduct a hypothesis in order to determine if the mean is greater than specified value, the system of hypothesis would be:
Null hypothesis:
Alternative hypothesis:
For this case the significance is 1%. So we need to find a critical value in the normal standard distribution who accumulates 0.99 of the area in the left and 0.01 in the right and for this case this critical value is:
Step-by-step explanation:
Notation
represent the sample mean
represent the standard deviation for the population
sample size
represent the value that we want to test
represent the significance level for the hypothesis test.
z would represent the statistic (variable of interest)
State the null and alternative hypotheses.
We need to conduct a hypothesis in order to determine if the mean is greater than specified value, the system of hypothesis would be:
Null hypothesis:
Alternative hypothesis:
For this case the significance is 1%. So we need to find a critical value in the normal standard distribution who accumulates 0.99 of the area in the left and 0.01 in the right and for this case this critical value is: