A sociologists was investigating the ages of grandparents of high school students. From a random sample of 10high school students, the sociologist collected data on the current ages, in years, of the students' maternal grandparents. A. One of the sociologist's research questions was about the mean difference in age without regard to which grandparent is older. The interval constructed in part (a) does not address such a question. Based on the sample of high school students, give the value of the point estimate for the mean difference in age that could be used to address the sociologist's question.
Answers
Answer:
The answer for (a)(-5.96, 2.36)(b) -1.8, since the difference is negative, it can be said or determined that the age of the grandfather is older
Step-by-step explanation:
Solution
(a) From the information given,
n = 10, d =-1.8, sd = 5.81
The 95% confidence interval for the population mean difference age is computed as follows:
CI =d ±tα/2,n-1 (sd/√n)
= -1.8±t₀.₀₅/₂,₁₀₋₁ (5.81/√10)
=-1.8± 2.26 (1.84)
= -1.8 ± 4.16
= (-5.96, 2.36)
Now,
There is a 95% confidence that the mean difference in age of maternal grand parents of high school students lies between - 5.96 and 2.36
(b) The age difference is calculated as the age of grand mother minus age of grand father. the point of estimate for the mean difference is as follows:
Xd = XGM - XGF
= 69.8 -71.6
=-1.8
Therefore, since the difference is negative, it can be said or determined that the age of the grandfather is older
Note: kindly find an attached copy of the complete question and table to this example below.
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I need help thank you.
The formula for height, in feet of a projectile under the influence of gravity is given by h=-16t^2+vt+s, where t is the time in seconds, v is the upward velocity at the start, and s is the starting height. Marvin throws a baseball straight up into the air at 70 feet per second. The ball leaves his hand at a height of 5 feet. When does the ball reach a height of 75 feet?
The sum of two numbers is 95, and their difference is 61. What are the two numbers?
Express each number in standard form -9.5x10-3 This is 10 to the -3 power
Answers
x^2 -qx -px + pq
x^2 -(q+p) x +pq
so the constant here is the product of p & q
the answer is A
hope this helped
0.015
0.245
0.735
Answers
Answer:
Option 3 is correct.
Step-by-step explanation:
Given that Nathan had an infection, and his doctor wanted him to take penicillin. Because Nathan’s father and paternal grandfather were allergic to penicillin, Nathan has a 75% chance of having the same allergy. The doctor performed a skin test to see whether Nathan would react to it. The test is 98% accurate.
we have to find the probability that Nathan is not allergic to penicillin and the test predicts it.
As, Nathan has a 75% chance of having the same allergy.
Hence, (100-75)%=25% chance of not having the same allergy.
Also the test predicts given
∴ Probability that Nathan is not allergic to penicillin and the test predicts it is =
=
Hence, Option 3 is correct.
Answers
x<√67<y
assuming x and y are consecutive
x<√67<y
squaer root everybody
x^2<67<y^2
so just find the ones that are closest to 67
8^2=64
9^2=81
64<67<81
8^2<67<9^2
the consecutive integers are 8 and 9
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is translated up 8 units. Which equation represents the translated graph?
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