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
Delicious77 [7]
3 years ago
13

A test score of 48.4 on a test having a mean of 66 and a standard deviation of 11. Find the ​z-score corresponding to the given

value and use the ​z-score to determine whether the value is significant. Consider a score to be significant if its ​z-score is less than -2.00 or greater than 2.00. Round the ​z-score to the nearest tenth if necessary. A. -1.6; not significant B.-17.6; significant C. -1.6, significant D. 1.6; not significant
Mathematics
1 answer:
Mariulka [41]3 years ago
3 0

Answer:

A. -1.6; not significant

Step-by-step explanation:

The z-score of a data set that is normally distributed with a mean of \bar x and a standard deviation of \sigma, is given by:

z=\frac{x-\bar x}{\sigma}.

From the question, the test score is: x=48.4, the mean is \bar x=66, and the standard deviation is \sigma =11.

We just have to plug these values into the above formula to obtain:

z=\frac{48.4-66}{11}.

This simplifies to:  z=\frac{-17.6}{11}.

z=-1.6.

We can see that the z-score falls within two standard deviations of the mean.

Since -2\le-1.6\le2 the value is not significant.

The correct answer is A. -1.6; not significant

You might be interested in
Solve for z.<br> 2<br> 39z+ 17z = 0
Tamiku [17]

Answer:

Z = 0

Step-by-step explanation:

Z is 0 because there’s no other possible solutions

8 0
2 years ago
A triangle has side measures of 8, 13, 15. Are these the measures of a RIGHT Triangle?
Andreas93 [3]

Answer:

No.

Step-by-step explanation:

Since we know the side lengths of the triangle, we can figure out whether or not this is a Pythagorean triple.

Pythagorean theorem: a^2 + b^2 = c^2

a and b are both smaller than c.

So,

8^2 = 64.

13^2 = 169.

15^2 = 225.

64 + 169 = 233.

233 is not equal to 225.

Therefore, this is not a right triangle.

6 0
3 years ago
Out of 1,500 licensed drivers, 900 admitted that they do not like to drive at night. What is the 92% confidence interval for the
Lynna [10]

The confidence interval for the mean population of drivers who do not like driving at night is 57.79% - 62.21%.

<h3><u>Confidence interval</u></h3>

To determine what is the 92% confidence interval for the population mean of drivers that do not like driving at night, the following calculation must be performed:

  • 1500 = 100
  • 900 =X
  • 900 x 100 / 1500 = X
  • 60 = X
  • 60 x 0.92 = 55.2
  • 60 x 1.08 = 64.8

Therefore, the confidence interval for the mean population of drivers who do not like driving at night is 57.79% - 62.21%.

Learn more about confidence intervals in brainly.com/question/2396419

3 0
3 years ago
What is 1/5 of 30????
igor_vitrenko [27]
1/5 of 30 is 6!
In order to find this you do
1/5 x 30
Answer: 6
5 0
3 years ago
Read 2 more answers
Can someone help me please....
zhannawk [14.2K]

Answer:

B. 350 minutes

Step-by-step explanation:

7 0
3 years ago
Other questions:
  • A new car is purchased for 17900 dollars. The value of the car depreciates at 13% per year. What will the value of the car be, t
    6·1 answer
  • You sellBoth cookies and bread at a farmer’s market every Sunday you sell cookies go $5 a dozen and the bread for $4 a loaf your
    14·1 answer
  • Two sides of a triangle measure 3 inches and 9 inches. which inequality represents all the possible lengths of the third side of
    6·1 answer
  • A rectangular room has a diagonal measure of 20 meters. the room is four meters longer than it is wide. find the room's dimensio
    12·1 answer
  • A data analyst wants to set up a hypothesis test to determine if the mean number of courses taken in a college semester is diffe
    11·1 answer
  • What are the coordinates of the point where the x-axis and the y-axis intersect on a coordiantest plane
    15·1 answer
  • Simplify c- 3c + 9<br> A. -4c + 9<br> B. -5c – 9<br> C. -2c +9
    9·2 answers
  • 2,400 in.=_ft. Thanks guys!!!!!
    8·2 answers
  • Help PLEASE I DONT GET IT
    8·2 answers
  • what is 20+200000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!