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
11

We use the t distribution for the statistical inference of the population mean when the underlying population standard deviation

is not known. Under the assumption that the population is normally distributed, find tα/2,df for the following scenarios. Use Table 2. (Round your answers to 3 decimal places.) tα/2,df
a. A 90% confidence level and a sample of 28 observations.
b. A 95% confidence level and a sample of 28 observations.
c. A 90% confidence level and a sample of 15 observations.
d. A 95% confidence level and a sample of 15 observations
Mathematics
1 answer:
Digiron [165]3 years ago
6 0

Answer:

Step-by-step explanation:

Since population std deviation is not  known, we use t critical value for testing of hypothesis.

a) 90% conf level when n =28

df = 27, t critical = 1.706

b) 95% 28

df =27 and t critical = 2.052

c) 90% and 15

df =14 and t critical = 1.761

d) 95% and n =15

df =14:   t critical = 2.145

You might be interested in
Can someone help me plz. my answer was 9 but it was wrong. plz help!! solve for x<br> 3x+9=27
bija089 [108]
The answer is 6
See attached.

3 0
3 years ago
PLEASE HELP (50 Points)....
Vedmedyk [2.9K]

Total deposit = 645.30 + 645.30 = $1290.60

Total withdrawals= 158.25 +168.36+157.42+148.46 = $632.49

Balance = 398.26 + 1290.60 - 632.49 = $1056.37

4 0
3 years ago
Read 2 more answers
By which rule are these triangles congruent?<br> A) AAS <br> B) ASA <br> C) SAS <br> D) SSS
Veronika [31]

Answer:

the answer is c)SAS

Step-by-step explanation:

as the sides are already given and and both angles will be equal as vertically opposite angles (VOA)are always equal.

3 0
3 years ago
What is 8/10 divided by 1 5/6
yulyashka [42]
The answer is <span>0.43 that is what i got</span>
7 0
3 years ago
Read 2 more answers
CAN SOMEONE PLEASE HELP ME !
77julia77 [94]
I believe the answer would be 24 square units
5 0
3 years ago
Other questions:
  • The probability that Tim will sink a foul shot is 70%. If Tim attempts 30 foul shots, what is the probability that he sinks exac
    6·2 answers
  • Emma buys packets of coloured beads.
    5·1 answer
  • PLEASE HELP IT'S URGENT! I WILL AWARD BRAINIEST
    8·2 answers
  • Mary got 85% correct on her math test. Mary missed 6 questions. How many total questions were on her math final?
    6·2 answers
  • Marco wants to create a new circle using gx as a radias. What will be the area of marcos new circle ?
    14·2 answers
  • What is the area of the patio floor shown?
    9·1 answer
  • Instructions: Find the measurement of the diagonal indicated in the following parallelogram.
    5·1 answer
  • Kathy has $2.10 in her pocket. She only has two different types of coins. She has the same number of each coin. What kinds of co
    8·1 answer
  • #72 i will give brainliest to the best answer!​
    15·1 answer
  • Which exponential model best represents the data
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!