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
kow [346]
2 years ago
15

Previously, an organization reported that teenagers spent 4.5 hours per week, on average, on the phone. The organization thinks

that, currently, the mean is higher. Fifteen randomly chosen teenagers were asked how many hours per week they spend on the phone. The sample mean was 4.75 hours with a sample standard deviation of 2.0. Conduct a hypothesis test.
Mathematics
1 answer:
kiruha [24]2 years ago
3 0

The standard normal distribution is a special type of normal distribution where the mean is 0, and the standard deviation is 1. The hypothesis can not be concluded.

<h3>What is Standard normal distribution?</h3>

The standard normal distribution is a special type of normal distribution where the mean is 0, and the standard deviation is 1.

For the given problems, the Hypothesis mean is 4.5. The sample mean was 4.75 hours with a normal standard deviation of 2.0.

Now, calculating the z-score,

z = \dfrac{\bar x - \mu_o}{\dfrac{\sigma}{\sqrt n}}\\\\\\z = \dfrac{4.75-4.5}{\dfrac{2}{\sqrt{15}}}\\\\\\z = 0.48

Now, as per the standard normal table, the p-value is 0.6844. Since the p-value is greater than the significance level, the hypothesis can not be concluded.

Hence, The hypothesis can not be concluded.

Learn more about Standard normal distribution:

brainly.com/question/25447725

#SPJ1

You might be interested in
Which set of numbers is in order from least to greatest?
ozzi

Eliminate A immediately, because "367,259 < 364,798" is false.

Elim. C because "367,313 < 367,259" is false.

Thus, B is the correct answer.

5 0
3 years ago
Read 2 more answers
Find the GCF of 6x+4 and divide
ella [17]
The GCF is 2
Merry Christmas
4 0
3 years ago
The metric prefix milli- means what
Ghella [55]
The prefix "milli-" means "one thousand"
3 0
3 years ago
HELP ASAP !!
denis-greek [22]
We have an equation: 432/?= 3/5

Cross multiply:
3*?= 432*5
⇒ ?= 432*5/3= 720

720 students use regular pencils~
6 0
2 years ago
Write an equation for/the nth term of the arithmetic sequence 6,3,0,3,..
klasskru [66]

Answer:

Step-by-step explanation:

Enésimo termo da sequência aritmética 6,3,0, -3 esta é uma Sequência Aritmética com o primeiro termo de 6 ed (distância) de -3.

a1 = 6

an = an-1 - 3 para n> 1

7 0
2 years ago
Other questions:
  • The ratio of Mary’s downloaded iPad apps to Katie’s is 12 to 8. If Katie has 96 apps how many does Mary have?
    5·1 answer
  • Which of these are symptoms of schizophrenia?. A. expressing emotions less intensely B.compulsively repeating an action C.wantin
    12·1 answer
  • Im stuck on A and B ​
    6·1 answer
  • Given that events A and B are mutually exclusive, i.e., A?B = ? and P(A?B) =0, and that P(A)=0.7 and P(B)=0.2, find P(A or B).
    14·1 answer
  • What is the lateral area of the cone to the nearest whole number? The figure is not drawn to scale. Helppp which one is it
    8·1 answer
  • After stepping into a room with unusual lighting, Bridgette's pupil has a radius of 3 millimeters. What is the pupil's diameter?
    10·1 answer
  • What is the result of adding two or more numbers?
    13·2 answers
  • Solve for x, and JUSTIFY your answer.
    14·1 answer
  • I need help finding the value of x and the measure of each angle
    6·2 answers
  • Differentiate <br><img src="https://tex.z-dn.net/?f=%20%5Csqrt%7Bx%7D%20%20%2B%20%20%5Cfrac%7B1%7D%7B5x%7D%20%20-%203" id="TexFo
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!