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
sweet-ann [11.9K]
3 years ago
12

A real estate agent is working for a developer who claims that the average commute time to downtown is 20 minutes with a standar

d deviation of 7 minutes. Stephon is an independent real estate agent and wants to check the times for his client. He took a random sample of 15 commute times and found an average of 26 minutes. He did hypothesis testing using a significance level of 5%. Which conclusion could he make?
Mathematics
2 answers:
vova2212 [387]3 years ago
8 0

the answer is C. the z- statistic is 3.32, so the null hypothesis should be rejected.

torisob [31]3 years ago
4 0

To calculate the z-statistic, we must first calculate the standard error.

Standard error is standard deviation divided by the square root of the population. In this case, it is equal to 1.81.

The z-score is defined the distance from the sample to the population mean in units of standard error.

z = (26 – 20)/1.81 = 3.31

at this z-score = 0.0005 which is less than 5%

<span> </span>

You might be interested in
What is 956.074054898 rounded to the nearest whole number​
Aleks [24]
956 dude this is not difficult
3 0
3 years ago
PLEASE HELP<br><br> What is the value of x?
KonstantinChe [14]
Side JL is 4√2  recall that in a 30-60-90 right triangle the hypotenuse is 2 times the size of the short leg.

JL also serves as the hypotenuse of the 45-45-90 triangle JML.  The ratio of side lengths in this triangle is 1:1:√2

So we can see that the value of x = 4

7 0
3 years ago
Katie is buying souvenir.gifts for her big family back home. She wants to buy everyone either a key chain or a magnet. The magne
NikAS [45]
The total number of gifts = x+y.
The inequality is:
x+y  \geq 24

Key chains cost $1, Magnets $0.50
Total Cost = x + 0.5y
Inequality is:
x+0.5y  \leq 20

Without graphing you can solve system by using substitution:
y = 24 - x  \\  \\ x + 0.5(24-x) = 20   \\  \\ 0.5x +12 = 20  \\  \\ x = 16 \\  \\ y = 24-16 = 8

This is one solution where the maximum x value is given.
So the most keychains that can be purchased is 16. However, because magnets are cheaper, more can be purchased as long as cost remains under 20.

If you solve both inequalities for "y", you get the upper and lower bounds for how many magnets can be purchased given a quantity of keychains.

24-x  \leq y  \leq 40 -2x \\  \\ x \leq 16

This is complete solution which gives all possible combinations.
(Graph is Attached)

6 0
3 years ago
Solve the given equation <br> 7/10X=4 3/5
Vedmedyk [2.9K]

Answer:

x

=

40

Step-by-step explanation:

5 0
3 years ago
JUST HELP ME ITS DUE IN5 MINUTES:"( ASAP &lt;3
Citrus2011 [14]

Answer:

A. 25%

25% is equivalent to 1/4 and when you multiply 75 by 4 you get 300. Which means 75 is equivalent to 1/4 and 1/4 is equivalent to 25%. So the answer is 25%. I'm so sorry if this explanation is bad

5 0
2 years ago
Other questions:
  • Quota sampling is most commonly used in a. descriptive research. b. collecting primary data. c. surveys. d. population research.
    15·1 answer
  • John has $20.00 to spend for his mother's birthday. A string of pearls and a pair of pearl earrings costs $25.00. They are on sa
    14·1 answer
  • 62.5% of what number is 25 ?
    13·1 answer
  • Evaluate the expression x2 • x1 for x = 9
    14·2 answers
  • Gymnast Clothing manufactures expensive hockey jerseys for sale to college bookstores in runs of up to 300. Its cost (in dollars
    10·1 answer
  • What is the answer to this, there were 22869 children, 49563 men, and 2872 more women than men at the fair. How many people were
    8·1 answer
  • If you have a 25 question test and you made a 64 on it, then how many questions did you get right and how many did you get wrong
    7·2 answers
  • If 4 + 6 = 10, does (4 + 6) X 3= 10 X 3? Why or why not?​
    9·1 answer
  • How to know when it’s a function
    9·2 answers
  • How do I solve <br><br> x² - 10x-3=0
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!