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
wariber [46]
3 years ago
7

A metropolitan transportation authority has set a bus mechanical reliability goal of 3,800 bus miles. Bus mechanical reliability

is measured specifically as the number of bus miles between mechanical road calls. Suppose a sample of 100 of 100 buses resulted in a sample mean of 3850 bus miles and a sample standard deviation of 275 bus miles. Please show your work.
A. T-stat=

B. The critical values is/are?

C. Is there sufficient evidence to reject the null hypothesis using a=0.05.
Mathematics
1 answer:
DaniilM [7]3 years ago
6 0

Answer:

(A) T-stat = 1.82

(B) Critical value is 1.645

(C) Yes, there is sufficient evidence to reject the null hypothesis using a 0.05 significance level.

Step-by-step explanation:

(A) T-stat (z) = (sample mean - population mean) ÷ sd/√n

sample mean = 3850 bus miles

population mean = 3800 bus miles

sd = 275 bus miles

n = 100

z = (3850 - 3800) ÷ 275/√100 = 50 ÷ 275/10 = 50 ÷ 27.5 = 1.82

(B) The test is a one-tailed test. The critical value is obtained from the standard normal distribution table. The critical value using a 0.05 significance level is 1.645

(C) Null hypothesis: The bus mechanical reliability is 3850 bus miles.

Alternate hypothesis: The bus mechanical reliability is less than 3850 bus miles.

Conclusion:

There is sufficient evidence to reject the null hypothesis because the test statistic (1.82) is greater than the critical value (1.645)

You might be interested in
GIIVNG BRAINLY FOR CORRECT ANSWER
zysi [14]
The answer is 36 bc ik
6 0
3 years ago
Read 2 more answers
What point is a solution?
vladimir1956 [14]

(3,2) is the solution

7 0
3 years ago
Read 2 more answers
You can pay $4.80 for 8 pounds of sugar or $11.75 for 25 pounds of
cricket20 [7]
25 pounds would be a better deal
7 0
2 years ago
Read 2 more answers
I need the answer for this
Svetach [21]

Answer:

535.9 ft²

Step-by-step explanation:

Since there are 360° in a circle, and 240° is 2/3 of 360°, we can say that the area of the bolded sector is <em>2/3 the area of the whole circle</em>. The area of a circle with a radius of r is πr², or approximately 3.14r², so the area of the whole circle is ≈ 3.14(16)² = 3.14(256) = 803.84 ft². Taking 2/3 of this gets us 803.84 * (2/3) ≈ 535.9 ft²

6 0
3 years ago
PLEASE HELP I WILL GIVE BRAINLESIST​
kaheart [24]
A is your answer




let me know if you have any questions
4 0
2 years ago
Other questions:
  • How do I find slope of a line (0,3) and (8,-3)
    12·2 answers
  • 74,181,467 in scientific Notation
    7·1 answer
  • For the past 20 years, the high temperature on April 15th has averaged = 92 degrees with a standard deviation of = 4. But on the
    12·1 answer
  • What does y equal if 5x+y=40
    7·1 answer
  • A chef planning for a large banquet , thinks that 2 out of every 5 dinner guests will order his soup appetizer. He expects 800 g
    13·1 answer
  • Help ASAP, WILL MARK BRAINLIEST!!<br> please look at image before answering!
    10·1 answer
  • What do large differences of the means of each group indicate? Select the correct answer. The large differences do not indicate
    9·1 answer
  • What is the slope of a line containing (4,6) and (0,8)?
    5·2 answers
  • Two-Dimensional Nets and Surface Area - Quiz - Level F
    9·2 answers
  • 9 + 7 × ( 15 + 3 )÷3 2= Giving brainliest
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!