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
Mice21 [21]
3 years ago
7

Find the value of the test statistic z using . The claim is that the proportion of adults who smoked a cigarette in the past wee

k is less than ​, and the sample statistics include n subjects with saying that they smoked a cigarette in the past week.
Mathematics
1 answer:
kolezko [41]3 years ago
3 0

Correct question is;

The claim is that the proportion of adults who smoked a cigarette in the past week is less than 0.35, and the sample statistics include n = 1168 subjects with 385 saying that they smoked a cigarette in the past week. Find the value of the test statistic

Answer:

Test statistic is z = -1.46

Step-by-step explanation:

Let's first of all define the hypotheses:

Null hypothesis:

H0: p = 0.35, i.e 35% in the sample of 1,168 adults have smoked cigarettes in the previous week.

Alternative hypothesis:

Ha: p < 0.35, i.e less than 35% in the sample of 1,168 adults have smoked cigarette in the previous week.

The sample size is, n = 1,168 while the number of adults who smoked in the previous week would be; x = 385

Therefore, the sample proportion of adults who smoked in the previous week would be calculated as;

p^ = x/n = 385/1168 ≈ 0.3296

Now, from Central Limit Theorem for large samples, The sampling distribution of the sample proportion p^, will have a mean of μ = p = 0.35

Formula for standard deviation is;

σ = √[p (1 – p)/n]

σ = √(0.35 × (1 – 0.35)/1168)

σ = √0.0001947774

σ = 0.014

Formula for test statistic is;

z = (p^ - p)/σ

z = (0.3296 - 0.35)/0.014

z = - 1.46

You might be interested in
Please help me i’ll appreciate it
yanalaym [24]

9514 1404 393

Answer:

  (c)  g(x) = 1/3·f(x)

Step-by-step explanation:

You can pick a point, such as the vertex at (2, -3) on f(x) and see which of the transformations gives you a point on the graph of g(x).

You will find that g(x) represents a vertical scaling by a factor of 1/3, so ...

 g(x) = 1/3·f(x)

__

The point (2, -3) on f(x) corresponds to the point (2, -1) on g(x).

5 0
3 years ago
Math expert in polygon angle​
soldier1979 [14.2K]

Answer:

50°

Step-by-step explanation:

The internal angles on a quadrilateral sum to 360.

So x+10+2x+x+3x=360

7x+10=360

7x=350

x=50

3 0
3 years ago
How do you simplify 50 1/2+ -12.3
levacccp [35]

50 1/2 = 50.5

50.5 + -12.3

When adding a negative number to a positive number, it basically becomes just subtraction so  50.5 + -12.3 means 50.5 - 12.3

50.5 - 12.3 = 38.2

3 0
3 years ago
Fill in the table using this function rule y= 18-3x
Mashcka [7]

Answer:

1:15 2:12 3:9 5:3

Step-by-step explanation:

All you have to do is plug in the # under the letter x , and plug it into the equation. For example 18 - 3 x 1 , is just saying what is 18 - 3 . Another example would be 18 - 3 x 2 . the equation is simply just 18 - 6 . Just plug in the x numbers in the equation. Hope my answer helped  , and good luck! : )

4 0
4 years ago
What is formed when two complementary angles share one ray?
aleksklad [387]

Answer:

B.

the complementary angles form a right angle with the shared ray

5 0
3 years ago
Other questions:
  • Across a horizontal distance of 25 feet, a roller coaster has a steep drop. The height of the roller coaster at the bottom of th
    13·1 answer
  • Rerange w= 3(2a+b)-4 to make a the subject
    13·1 answer
  • 7. The claim that started this investigation was that students majoring in engineering are more likely to be in the marching ban
    5·1 answer
  • Which of the following would be equivalent to 92 ⋅ 96?
    15·2 answers
  • Which formula can be used to find the math term of a geometric sequence where the first term is 8 and the common ratio is -3?
    13·1 answer
  • (03.02 HC)Amy, Dan, and Mike are competing in a cooking competition. They all used different amounts of milk from a container ho
    7·2 answers
  • 8) What are the products of photosynthesis?
    13·1 answer
  • Help pleaseeeeeeeee
    9·2 answers
  • Nancy bought a mobile phone marked at 720$ at a discount of 20 percent and she had to pay 5 percent tax. If Nancy had to put 20
    15·1 answer
  • How do I find the answer?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!