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
CaHeK987 [17]
3 years ago
7

For the following hypothesis test, H0: μ ≥ 150Ha: μ < 150​the test statistic a. must be positive. b. must be negative. c. can

be either negative or positive. d. must be a number between zero and one.
Mathematics
1 answer:
Virty [35]3 years ago
7 0

Answer:

t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}} (1)      

t-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".  

And since we are conducting a lower unilateral lest  then we expected that the value for the statistic would be negative. And the correct answer would be:

b. must be negative

Step-by-step explanation:

Data given and notation      

\bar X represent the sample mean    

s represent the standard deviation for the sample      

n sample size      

\mu_o =150 represent the value that we want to test    

\alpha represent the significance level for the hypothesis test.    

t would represent the statistic (variable of interest)      

p_v represent the p value for the test (variable of interest)  

State the null and alternative hypotheses.      

We need to conduct a hypothesis in order to determine if the mean is lower than 150, the system of hypothesis would be:      

Null hypothesis:\mu \geq 150      

Alternative hypothesis:\mu < 150      

We don't know the population deviation, so for this case is better apply a t test to compare the actual mean to the reference value, and the statistic is given by:      

t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}} (1)      

t-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".  

And since we are conducting a lower unilateral lest  then we expected that the value for the statistic would be negative. And the correct answer would be:

b. must be negative

You might be interested in
Mr. See weights his grades. Tests are worth 60%, quizzes are worth 25% and homework is 15%. Joey's test average is an 82, his qu
goldenfox [79]

Answer:

83.15

Step-by-step explanation:

Joey's current grade can be determined by weighting his scores with the weights given and adding the results

Tests = 0.6 x 82 = 49.2

Quizzes = 0.25 x 77 = 19.25

homework = 0.15 x 98 = 14.7

49.2 + 19.25 + 14.7 = 83.15

4 0
2 years ago
tom's baseball team wins 5 out every 12 games they play. If the team played 36 games, how many games did Tom's team win
atroni [7]

Answer:

15 games

Step-by-step explanation:

12X3=36 5X3=15

6 0
2 years ago
Need some help I'm stuck on this question in the image <br><br>thank you​
saw5 [17]

Answer:

i think it's C

Step-by-step explanation:

i am very sorry if im wrong

3 0
2 years ago
XYZ Corporation operates two plants, each of which has a capacity of 100 units per day. Each day, XYZ must ship their product to
Strike441 [17]

9514 1404 393

Answer:

  1. {20, 20, 20, 40} units to {A, B, C, D}
  2. {0, 0, 0, 100}

  minimum shipping cost: 3000

Step-by-step explanation:

In general, shipping costs more from Plant 1. The excess costs to ship to customers A, B, C, D are, respectively, (24-18) = 6, (21-16) = 5, (19-19) = 0, (18-10) = 8.

The greatest excess cost is for shipping to customer D from plant 1, so we want to ship as many units as possible to customer D from plant 2.

Shipments from Plant 2 to Customers {A, B, C, D} = {0, 0, 0, 100}.

Then the remaining shipments are fulfilled from Plant 1.

Shipments from Plant 1 to Customers {A, B, C, D} = {20, 20, 20, 40}.

The amount spent on shipping each day is ...

  100×10 +20×24 +20×21 +20×19 +40×18

  = 20×(50 +24 +21 +19 +36) = 3000 . . . . daily shipping cost

6 0
2 years ago
If controllable margin is $220000 and the average investment center operating assets are $2000000, the return on investment is
Aleksandr-060686 [28]

Answer:

who is that rich brat

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Other questions:
  • Ldentify the following sections of the textbook.
    8·1 answer
  • A librarian has 274 return books. 50 of the books are reserved at her desk, and the remaining books need to be shelved. Each she
    15·1 answer
  • Help pls <br> 2y - 3.5 = 6.5
    12·1 answer
  • HELP ME WITH MATHHH!!!
    6·1 answer
  • Mrs imran owns two plots of equal worth. The property tax rate is 2%.if she paid Rs 15000 as the property tax last year, what is
    7·2 answers
  • Please help.....................................................................................................................
    11·2 answers
  • What is the total Fatima paid?
    9·1 answer
  • Help meeee pleaseeeeee thanks
    14·2 answers
  • HELLLLLLLLLLLLLLLLLLLLLLLLLLP
    8·1 answer
  • andres is 1.65 meters tall. At 2 p.m., he measures the length of a tree's shadow to be 40.15 meters. He stands 35 meters away fr
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!