Complete question :
Two researchers, Jaime and Mariya, are each constructing confidence intervals for the proportion of a population who is left-handed. They find the point estimate is 0.13. Each independently constructed a confidence interval based on the point estimate, but Jaime’s interval has a lower bound of 0.097 and an upper bound of 0.163, while Mariya’s interval has a lower bound of 0.117 and an upper bound of 0.173. Which interval is wrong? Why?
Answer:
Mariya's interval
Step-by-step explanation:
Point estimate = 0.13
Mariya's confidence interval :
Lower boundary = 0.117
Upper boundary = 0.173
Jamie's confidence interval :
Lower boundary = 0.097
Upper boundary = 0.163
The correct confidence interval should have an average value equal to the value of the point estimate ;
Jamie's confidence interval average :
(0.097 + 0.163) / 2 = 0.26 / 2 = 0.13
Mariya's confidence interval average :
(0.117 + 0.173) / 2 = 0.29 / 2 = 0.145
Based on the confidence interval average obtained we can conclude that Mariya's interval is wrong as it the average obtained is greater than the point estimate.
0.145 > 0.13
Answer:
(-5,1)
Step-by-step explanation:
y= 13.5+2.5x
-13.5 -13.5
-13.5= 2.5x
x= -5.4
Answer:
50 kilometres towards west .......
i guess
For example in physics v=u+at
If you have u, a and t and want to find v, you can substitute the numbers in and work it out.
Total one winter week snow fall = 15 1/2 inches .
On Monday it's = 2 3/4 inches.
On Tuesday = 1 1/2 times of 2 3/4 inches = 3/2 × 11/4 = 33/8 = 4 1/8 inches.
On Wednesday = 7/8 inches.
<em>Total snow fall on Monday, Tuesday and Wednesday = 2 3/4 inches + 4 1/8 inches + 7/8 inches </em>
= 6 + 3/4 + 1/8 +7/8 = 6 + 6/8 + 1/8 +7/8
= 6 + 14/8 = 6 + 1 6/8 = 7 6/8 or 7 3/4 inches.
<em>In rest of the week the snow fall is = 15 1/2 inches - 7 3/4 inches.</em>
8 inches + (1/2 - 3/4 ) = 8 inches + (2/4 - 3/4 )
8 - 1/4 = 8/1 -1/4
= 32/4 - 1/4
= 31 /4
= 7 3/4 inches.
<h3>Therefore, the town got 7 3/4 inches snow fall the rest of the week.</h3>
