answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
aleksandrvk
1 month ago
12

A sociologist studying the difference in ages between husbands and wives obtained a random sample of 55 married couples. The mea

n of the husbands’ ages was 38.5 years with standard deviation 12.6 years. The mean of the wives’ ages was 36.9 years with standard deviation 12.4 years. The sociologist calculated the difference between the ages for each couple. The mean difference was 1.6 years with standard deviation 2.1 years. A matched-pairs hypothesis test will be performed to investigate whether the difference is significant.
Mathematics
1 answer:
zzz [9K]1 month ago
8 0

Answer:

2.1/√55

Step-by-step explanation:

standard deviation divided by the sample size

You might be interested in
HELP!!!! 2 dot plots. Both number lines go from 0 to 10. Plot 1 is titled fifth grade. There are 2 dots above 1, 3 above 2, 1 ab
PIT_PIT [9117]

Answer:

5th-grade mean - 4.67

7th-grade mean - 3.46

5th-grade median - 5

7th-grade median - 3.5

7 0
14 days ago
Read 2 more answers
The previous task asked you to select the rectangle that did not represent an enlargement of the given rectangle. explain how yo
AnnZ [9099]

El cuadro de proporciones debe reflejar dimensiones que sean comparables a las del rectángulo original. Es decir, las medidas de los rectángulos adicionales deben multiplicarse por un factor de escala para hacer el aumento. Revisé cada medida para confirmar si era un múltiplo del rectángulo original.


4 0
17 days ago
Read 2 more answers
What is the maximum number of times two planes can intersect? What is the minimum number of times they can intersect?
Inessa [9000]
The least number of times that two planes can cross is zero, since parallel planes do not intersect. A good example would be a floor and a ceiling, which run parallel, hence they do not meet. Conversely, if two planes occupy the same space, they can intersect at infinitely many points, as could happen with a line within that plane.
8 0
1 month ago
A rectangular prism with integer side lengths has a height of $3$. If the surface area of the prism is equal to $52$, then what
lawyer [9240]
The given details include: Height of the rectangular prism, h = 3 units, Surface area of the prism, A = 52 sq units. We need to determine the volume of the prism. The volume of a rectangular prism can be calculated using the formula: l = length and b = breadth. Given that the surface area of the prism, A = lb, we have it equal to 52 sq units. Consequently, the volume is 156 cubic units.
3 0
13 days ago
steven has 9 different shirts 5 different hats 4 different scarves. Steven thinks that if he picks just two of the three items o
Inessa [9000]

Answer:

Steven is mistaken.

Step-by-step explanation:

Steven has

  • 9 unique shirts
  • 5 unique hats
  • 4 unique scarves.

He selects only two out of the three types of clothing. The combinations can be calculated as

  • 9\cdot 5=45 options to select a shirt and a hat;
  • 5\cdot 4=20 options to select a hat and a scarf;
  • 9\cdot 4=36 options to select a shirt and a scarf.

In total, there are

45+20+36=101

different methods to choose just two out of the three clothing items.

As a result, 101 Steven is not correct.

6 0
28 days ago
Other questions:
  • Enter a recursive rule for the geometric sequence. 6, −18, 54, −162, ...
    15·1 answer
  • A rectangle has height and width changing in such a way that the area remains constant 2 square feet. At the instant the height
    13·1 answer
  • How many natural numbers are there between 8² and 9²​​​
    11·1 answer
  • If 35% of a natural area is to be developed, leaving 500 acres untouched, how many acres are to be developed?
    7·2 answers
  • A ___ is obtained by dividing the population into groups and selecting all individuals from within a random sample of the groups
    9·1 answer
  • Pllllllllzzzzzzz answer this!!!♥️♥️
    11·1 answer
  • Maddy is carrying a 555 liter jug of sports drink that weighs 7.5\text{ kg}7.5 kg7, point, 5, start text, space, k, g, end text.
    5·2 answers
  • Mrs.thapa bought 150 kg of oranges.18 kg of oranges were rotten and not fit for selling.If she sold the remaining quantity of or
    6·2 answers
  • Juanita read 48 pages, she read more than 5 chapters, but less than 10 chapters. all chapters are the same length how many chapt
    13·1 answer
  • The point (Negative StartFraction StartRoot 2 EndRoot Over 2 EndFraction, StartFraction StartRoot 2 EndRoot Over 2 EndFraction)
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!