Answer:
Step-by-step explanation:
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2 answers:
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Hi! You don't actually need to graph this nor find the intersection in order to know the answer. Through the process of elimination we can rule out incorrect answers.
Firstly, we express both equations with y on the left hand side since all choices are in that form:
Knowing these, we can immediately rule out options a, c, and d since they have the wrong equations. This will leave us with option b.
You can verify if the point of intersection provided in option b is true by plugging in the values of x and y to both equations (you will find that it is indeed true).
ANSWER: b. <span>picture of coordinate plane with line y equals negative 2x minus 1 and line y equals negative 3 halves x minus 3. They intersect at 4, negative 9.</span>
Firstly, we express both equations with y on the left hand side since all choices are in that form:
Knowing these, we can immediately rule out options a, c, and d since they have the wrong equations. This will leave us with option b.
You can verify if the point of intersection provided in option b is true by plugging in the values of x and y to both equations (you will find that it is indeed true).
ANSWER: b. <span>picture of coordinate plane with line y equals negative 2x minus 1 and line y equals negative 3 halves x minus 3. They intersect at 4, negative 9.</span>
Answer:
The value of test statistics is 1.06.
Step-by-step explanation:
We are given that according to a marketing research study, American teenagers watched 14.8 hours of social media posts per month last year, on average. A random sample of 11 American teenagers was surveyed and the mean amount of time per month each teenager watched social media posts was 15.6. This data has a sample standard deviation of 2.5.
We have to test if the mean amount of time American teenagers watch social media posts per month is greater than the mean amount of time last year or not.
Let, NULL HYPOTHESIS, :
= 14.8 hours {means that the mean amount of time American teenagers watch social media posts per month is same as the mean amount of time last year}
ALTERNATE HYPOTHESIS, :
> 14.8 hours {means that the mean amount of time American teenagers watch social media posts per month is greater than the mean amount of time last year}
The test statistics that will be used here is One-sample t-test;
T.S. = ~
where, = sample mean amount of time per month each teenager watched social media posts = 15.6 hours
= sample standard deviation = 2.5 hours
n = sample of teenagers = 11
So, <u>test statistics</u> = ~
= 1.06
Hence, the value of test statistics is 1.06.