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
AnnyKZ [126]
2 years ago
11

In a certain city , the hourly wage of workers on temporary employment crontracts is normally distributed. The mean is $15 and t

he standar deviation is $3. What percentage of temporary workers earn less than $12 per hour?
A) 6%
B) 16%
C) 26%
D) 36%
Mathematics
1 answer:
Doss [256]2 years ago
4 0

Answer:

16%

Step-by-step explanation:

The mean is $15 and the standar deviation is $3.

mean = 15  and SD = 3

We need to find percentage less than 12 per hour

P(x<12)= P(x=12)

to find P(x=12) we find z-score

z= \frac{x-mean}{SD} =\frac{12-15}{3} =-1

Now use z-score table . z-score = 0.1587

P(x=12)=0.1587

To get percentage we multiply by 100

0.1587 * 100 = 15.87 = 16%

You might be interested in
What is the equation 12xyz – 45? A. monomial. B. constant. C. trinomial. D. binomial.
SVETLANKA909090 [29]
This <em>expression</em>, is a d. binomial

First term: 12xyz
Second term: -45

hope this helps
5 0
2 years ago
I need help with these questions
Lunna [17]

Answer:

5 ,  6,  2

Step-by-step explanation:

cause they da same

5 0
2 years ago
91/100 in simplest form
otez555 [7]
91/100 is already in simplest form
3 0
2 years ago
The vertex of a figure is located at (1, 3). The figure is rotated and the image of vertex is located at (-3, 1) Which of these
Aleksandr [31]

Answer:

LOLOLOLOLO

Step-by-step e

xplanation:

7 0
2 years ago
The Scottsdale fire department aims to respond to fire calls in 4 minutes or less, on average. Response times are normally distr
IgorC [24]
<h2><u>Answer with explanation</u>:</h2>

Let \mu be the population mean.

As per given , we have

H_0:\mu \leq4\\\\ H_a: \mu >4

Since the alternative hypothesis is right-tailed , so the test is a right-tailed test.

Also, population standard deviation is given \sigma=1 , so we perform one-tailed z-test.

Test statistic : z=\dfrac{\overline{x}-\mu}{\dfrac{\sigma}{\sqrt{n}}}

, where \mu = Population mean

\sigma = Population standard deviation

n= sample size

\overline{x} = Sample mean

For n= 18 , \overline{x}=4.50 , \sigma=1 , \mu =4, we have

z=\dfrac{4.5-4}{\dfrac{1}{\sqrt{18}}}\approx2.12

P-value (for right tailed test): P(z>2.12) = 1-P(z≤ 2.12)  [∵ P(Z>z)=1-P(Z≤z)]\

=1- 0.0340=0.9660

Decision : Since P-value(0.9660) > Significance level (0.01), it means we are failed to reject the null hypothesis.

[We reject null hypothesis if p-value is larger than the significance level . ]

Conclusion : We do not have sufficient evidence to show that the goal is not being met at α = .01 .

3 0
3 years ago
Other questions:
  • Convert: 0.16 km = cm
    7·1 answer
  • 20 POINTS PLEASE HELP!!!!!!!
    5·1 answer
  • The sum of n and 6 total 15
    7·2 answers
  • 7. Find the slope of the line.
    9·2 answers
  • Find the value of a) 4:12 <br><br>​
    10·1 answer
  • To graph the equation y = 4x - 6<br> You should start the graph at the point (1<br> )
    15·1 answer
  • Which type of relationship would best model this data?
    13·1 answer
  • H(x)= ⎩ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎨ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎧ ​ 8+6x x+4 10 ​ 4x−3 ​ , , , ​ x&lt;−7 −7≤x&lt;−5 x≥−5 ​
    11·1 answer
  • What is the solution to this equation?<br> In(2x + 4) = ln(x + 3)
    10·1 answer
  • Elsa bought three books at a bookstore. Here are their prices (in dollars).
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!