1answer.
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
ivolga24 [154]
2 years ago
12

Please, help me. Thanks. Subject: Hypothesis testing and margin of errors

Mathematics
1 answer:
STatiana [176]2 years ago
4 0

Answer:

See below

Step-by-step explanation:

<u>Problem 4</u>

<u />H_0:\mu=145\\H_a:\mu>145

The null hypothesis, H_0, comes from the fact that the nurse initially thinks that the average height of 7th graders is equal to 145 cm.

The alternative hypothesis, H_a, comes from the fact that the average height may be greater than 145 cm since the nurse measured the average height to be 147 cm from the random sample.

<u>Problem 5</u>

<u />H_0:\mu\geq273\\H_a:\mu

The null hypothesis, H_0, comes from the fact that the manufacturer initially thinks that the mean lifetime of a certain type of batteries is at least 273 hours.

The alternate hypothesis, H_a, comes from the fact that the sample taken may show that it's actually less given a sample mean of 270.5 hours.

<u>Problem 6</u>

The mass population data set would be most suitable because the average score of a test comes from all those who have taken the test while the sample is the class with 25 students. That sample represents the population of all those that have taken the test.

<u>Problem 7</u>

Because it would take a lot of time and money to check every single child in Africa, it would make the most sense to use the sample data set where your samples come from each village and those samples have the children from each village.

<u>Problem 8</u>

This is a population characteristic because the sample that Sarah took for the average number of children per family represents the entire population.

<u>Problem 9</u>

This is a sample characteristic because the size of the sample was clearly large, this was a study, and other claims made.

You might be interested in
Hourly wage defenition
TiliK225 [7]
That term describes a rate an employer agrees to pay a worker per hour worked.
7 0
3 years ago
Read 2 more answers
-3x + 2y = 7<br> What is the answer to this algebra question
Salsk061 [2.6K]
Answer: 0
First: Move constant to the left by adding its opposite to both sides
-3x+2y-7=7-7
Then: Change the signs on both sides of the equation
3x-2y+7
Equaling: 3x-2y+7=0
7 0
3 years ago
May someone please help me on which to graph?
olga_2 [115]

Answer:

Option (4)

Step-by-step explanation:

Proportional relationship means,

y ∝ x

y = kx

k=\frac{y}{x}

Here, k = proportionality constant

Therefore, if the graph of a line passes through the origin (0, 0) table will represent the proportional relationship.

From table 1,

For a point (1, 2)

k=\frac{2}{1}=2

For another point (3, 2)

k=\frac{3}{2}=1.5

In both the cases 'k' is not same of constant.

Therefore, table (1) is not proportional.

For table (2),

Line passes through (2, 0).

That means there is a x-intercept → (2, 0)

Therefore, table doesn't represent a proportional relationship.

For table (3),

Line passes through a point (0, 1)

It means given line has a y-intercept → y = 1

Therefore, table doesn't represent a proportional relationship.

For table (4),

Line of this table passes through two points (1, 3) and (2, 6)

k=\frac{3}{1}=3

k=\frac{6}{2}=3

Therefore, proportionality constant for the given table is 3.

Now we can graph table (4).

6 0
3 years ago
Need help asap in delta math assignment
V125BC [204]

Answer:

8

Step-by-step explanation:

B^2 = C^2 -A^2 89-25 = 64 sqrt(64) is 8

8 0
3 years ago
Read 2 more answers
James estimate the product of 48 and 53 is that reasonable
Debora [2.8K]
50 x 50= 2500.............
8 0
3 years ago
Other questions:
  • If the median of the score distribution on this pop quiz is more than 170, the teacher will drop the next pop quiz. The pop quiz
    12·1 answer
  • A rectangular painting is made up of two congruent squares with sides that are 2 feet long. What is the area of the entire paint
    11·1 answer
  • What is the the equation for the line that has a slope of 0 and passes through the point (3,7)
    5·1 answer
  • I am a prime number greater than 40 and less than 90. My units digit and my tens digit are both prime. The difference between my
    14·1 answer
  • Jas has 145 dollars in her savings account she earns 36 dollars a week mowing lawns if jas saves all of her money after how many
    7·1 answer
  • Plssss
    9·2 answers
  • what is the quadratic equation for this graph? will make brainiest if also tell me how to put into vertex from
    9·1 answer
  • Cate and Elena were playing a card game. The stack of cards in the middle had 26 cards in it to begin with.
    10·1 answer
  • I neeed helppppp plssssssssssssssss
    14·2 answers
  • In the following table, the age (in years) of the respondents is given as the x value, and the earnings (in thousands of dollars
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!