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
viva [34]
3 years ago
12

A researcher conducts a hypothesis test using a sample of n = 40 from an unknown population. What is the df value for the t stat

istic?
a. 38
b. 39
c. 40
d. 41
Mathematics
1 answer:
aliya0001 [1]3 years ago
3 0

Answer:

Correct option: b 39.

Step-by-step explanation:

A one-sample (or one mean) t-test is applied to test whether the population-parameter is significantly different from some hypothetical value.

The degrees of freedom of the <em>t</em>-test is:

df = n - 1

It is provided that the sample size is, <em>n</em> = 40.

Compute the degrees of freedom as follows:

df = n - 1

   = 40 - 1

   = 39

Thus, the correct option is b.

You might be interested in
Samantha wants to find the height of a pine tree in her yard. She measures the height of the mailbox st 3ft and its shadow at 4.
Simora [160]
The tree is about 35.01 feet tall.
7 0
3 years ago
TIMED
Rudik [331]
-x^2 + 4x + 12 = -3x + 24

-> x^2 - 7x + 12 = 0

-> (x-3)(x-4) = 0

-> x= 3 or 4

so y = 15 when x = 3, y = 12 when x = 4
6 0
3 years ago
Read 2 more answers
Write down the exact value of:<br> a) cos 30°<br> b) sin 45°<br> c) tan 30°
Alexus [3.1K]

Answer:

a) 0.86602540378

b) 0.70710678118

c) 0.57735026919

Step-by-step explanation:

4 0
3 years ago
Add and simplify: 9/16 + 1/2=?
nasty-shy [4]
1 1/16 is the answer!! Hope this helps! <3 x
4 0
3 years ago
Please free fire me k dedo uid 1821384657​
blsea [12.9K]
Yooo finally someone that plays
8 0
2 years ago
Other questions:
  • Find the area of the polygon with the given vertices. J(−3, 4), K(4, 4), L(3,−3)
    14·1 answer
  • Find the product of 8x93 using distributive property. Show the steps and the solution
    13·2 answers
  • Colin rolls a fair dice 66 times. <br> How many times would Colin expect to roll a five?
    14·1 answer
  • Find the area of the shaded polygons:
    14·2 answers
  • A car starts a journey with a full tank of gas. The equation y=16 - 0.05x relates the number of gallons of gas, y, left in the t
    8·1 answer
  • Diego’s dog weighs more than 8 kilograms and less than 12 kilograms. Select all the inequalities that MUST be true if w is the w
    14·1 answer
  • IF YOU GET THE ANSWER RIGHT I WILL GIVE YOU 25 points
    11·2 answers
  • 6 less than n is greater than 8​
    10·1 answer
  • The sum of two numbers is at most 12, and the sum of 3 times the first number and 8 times the second number is at least 48 selec
    11·1 answer
  • The population of a certain city can be modeled by P = 130,000(1.018)t.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!