The z-statistic for Brett's data is found to be as given by: Option A: -5.30 (approx).
<h3>How to find the value of z-statistic for population mean?</h3>
Suppose we're specified that:
- The sample mean =
- The population mean =
- The population standard deviation =
- The sample size = n
Then the z-statistic for this data is found as:
For this case, we've got:
- The sample mean = = 295
- The population mean = = 310
- The population standard deviation = = 20
- The sample size = n = 50
Thus, we get:
Thus, the z-statistic for Brett's data is found to be as given by: Option A: -5.30 (approx).
Learn more about z-statistic here:
brainly.com/question/1640298
When you reflect a line segment, it would create a mirror-image of itself about the specified axis. Thus, if you reflect it over the x-axis, it will now be situated at the 4th quadrant, because it is what's opposite to the 1st quadrant with respect to the x-axis.
How you do this is using the formula speed = distance/time. So this is 100/5 which is 20 meters a second. Using the conversion factor (can google "20 meters per second is how many mile") 20 meters a second = 44.7 miles per hour.
In conclusion, the answer you're looking for is D. 44.7 miles per hour.
Answer:
switched signs around
Step-by-step explanation:
I believe that s/he switched the signs around so
|x|>5 is solved by x<-5 and x>5
but I'm not quite sure, sorry
