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
Nataly_w [17]
3 years ago
9

The mean income per person in the United States is $50,000, and the distribution of incomes follows a normal distribution. A ran

dom sample of 10 residents of Wilmington, Delaware, had a mean of $60,000 with a standard deviation of $10,000. At the 0.05 level of significance, is that enough evidence to conclude that residents of Wilmington, Delaware, have more income than the national average
Mathematics
1 answer:
sergij07 [2.7K]3 years ago
4 0

Answer:

Yes. There is sufficient eveidence to support  the claim that Wilmington resident's earn more than the national average

Step-by-step explanation:

Given the following;

\alpha=Significance \ Level=0.05\\n=10\\\bar X=60000\\\ s=sample\  \sigma=10000

#We set our hypothesis as:

H_o:\mu\leq 50000\\H_a:\mu>50000

The rejection region of either hypothesis:

P(t>t_o)=0.05, we determine the critical values for this probability in the T distribution table;

t=1.833

=>We reject for all values greater than 1.833, t>1.833.

#We now determine the value of the test statistic as:

t=\frac{\bar X-\mu_o}{s/\sqrt{n}}\\\\=\frac{60000-50000}{10000/\sqrt{10}}\\\\=3.1623

We find that:

t=3.1623>1.833,\ \ \ Reject \ H_o

Hence, there is sufficient eveidence to support  the claim that Wilmington resident's earn more than the national average.

You might be interested in
Jane has a checkbook balance of $68.00. She then writes two checks one for $5.00 and one for $62.50. She also deposits $75.00 th
Sunny_sXe [5.5K]
The answer here would be <span>ON/C 6 8 – 5 – 6 2 . 5 0 + 7 5 =</span>
4 0
2 years ago
Can some one help me out my grades are bad
Leya [2.2K]

Answer:

Go to the bottom of that problem and click save for later

5 0
2 years ago
IM BEGGING PLEEEASEEEEEEEEEEEEEEEEEEEEEE HELP ME
Alborosie
What is that A
What is that
6 0
3 years ago
Read 2 more answers
Natalia has 15,000 centimeters of yarn. How many meters of yarn does she have?
Usimov [2.4K]

Answer:

150 meters

Step-by-step explanation:

1 meter has 100 centimeters.

4 0
3 years ago
Select the correct answer. What is the product of and ? A. 9/5 B. 2 C.175/30 D/29
jonny [76]

Step-by-step explanation:

the answer is c i took the test btw

4 0
2 years ago
Read 2 more answers
Other questions:
  • To save money for a video game you put $1 in an envelope each day for 5 days you double the number of dollars in the envelopes f
    7·1 answer
  • What is the product of 14.23 and -5
    9·2 answers
  • Which equation has infinitely many solutions?
    14·2 answers
  • <img src="https://tex.z-dn.net/?f=f%28x%29%20%3D%20%7B2%7D%5E%7Bx%7D%20%20%20%2B%203" id="TexFormula1" title="f(x) = {2}^{x} +
    12·1 answer
  • Which answer describes the transformation of f(x)=log2(x−5)−2 from the parent function g(x)=log2x ? A) It is the graph of g(x) s
    9·1 answer
  • Which Rule describes the composition of transformations that maps figure PQRS to figure P”Q’R”S”?
    14·2 answers
  • Heather finished the 12-kilometer race in 2 hours. If Heather kept her pace constant, what was her rate? A. 24 km/hr. B. 14 km/h
    13·1 answer
  • Dr. Wong has a table of data in her veterinarian office that shows the average lifespans and weights of several popular dog bree
    5·2 answers
  • Can two rectangles with the same side lengths be congruent
    8·2 answers
  • A, B &amp; C form a triangle where Z BAC = 90°.
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!