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
Subtract-2x^2-6x+10 from -2x +9
sesenic [268]

Answer:

-4x0 -6x -1

Step-by-step explanation:

I believe its true.

8 0
2 years ago
What is the problem of 200 and 400
user100 [1]
200+400=600 u just add 2 and 6 togather and u get 6 and then annd the two zeros on too it 
6 0
3 years ago
Need help......................
Lera25 [3.4K]
I don’t really know it sry
5 0
3 years ago
Is 11/20 greater than a half
Rainbow [258]
Yes... a half is equal to 10/20 and 11/20 is greater than 10/20 so 11/20 is greater than a half
8 0
3 years ago
Read 2 more answers
Let ​ f(x)=x2−8x+19 ​ . What is the minimum value of the function?​ Enter your answer in the box. ​
ella [17]
The minimum value is 3.
6 0
3 years ago
Read 2 more answers
Other questions:
  • Which of the following is the algebraic expression represented by the verbal expression below?
    10·1 answer
  • an amount of $41,000 is borrowed for 7 years at 6.75% interest, compounded annually. If the loan is paid in full at the end of t
    12·1 answer
  • What is the area of this composite figure? 12ft2 80 ft2 88 ft2 100 ft2
    8·2 answers
  • 1. What’s the answer to this question
    5·2 answers
  • 4x+c=w make x a subject<br>plz help me <br>answer me fast<br>and i want answer kn step by step<br>​
    14·2 answers
  • Two candidates run for class president. After all the ballots are counted, one candidate has 50% of the votes. What decimal name
    6·2 answers
  • 5. What is the measure of side B if side A=6 and side C=12? (Assume this is a right triangle)
    14·2 answers
  • What is the value of x?<br> o 3<br> o 6<br> o 10<br> o12
    10·1 answer
  • Which line has a y-intercept of -2?<br> A) L<br> B) P<br> C) T<br> D) Both L and T
    10·1 answer
  • An angle of 1.5 rad intercepts an are on the unit circle. What is the length of the intercepted arc?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!