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
Grace [21]
3 years ago
12

A recent survey of 8,000 high school students found that the mean price of a prom dress was $195.00 with a standard deviation of

$12.00. Alyssa thinks that her school is more fashion conscious and spent more than $195.00. She collected data from 20 people in her high school and found that the average price spent on a prom dress was $208.00. Which of the following is the correct z-statistic for this situation?
Mathematics
2 answers:
Sloan [31]3 years ago
6 0

Answer:

4.84

Step-by-step explanation:

got it right on edge2020

cluponka [151]3 years ago
4 0
The z-statistic can be calculated as the difference in the population mean and sample mean divided by the standard error. The standard error can be calculated as the standard deviation divided by square root of sample size. The standard error: SE = 12/ sqrt(20) = 2.68 The z-statistic: (195 -208) 2.68 = -4.86
You might be interested in
Which of the following pairs of functions are inverses of each other?
AnnyKZ [126]

Answer:

Step-by-step explanation:

Rearrange each function to solve for x.

Switch x and y,

The resulting equation is the inverse function.

A:

f(x) = y = 5+x

x = y-5

y = x-5

f⁻¹(x) = x-5

g(x) = 5-x ≠ f⁻¹(x)

g(x) is not the inverse of f(x).

:::::

B:

f(x) = y = 2x-9

x = (y+9)/2

y = (x+9)/2

f⁻¹(x) = (x+9)/2

g(x) = (x+9)/2 = f⁻¹(x)

g(x) is the inverse of f(x).

:::::

C:

f(x) = y = 2/x - 6

x = 2/(y+6)

y = 2/(x+6)

f⁻¹(x) = 2/(x+6)

g(x) = (x+6)/2 ≠ f⁻¹(x)

:::::

D:

f(x) = y = x/3 + 4

x = 3y - 12

y = 3x - 12

f⁻¹(x) = 3x - 12

g(x) = 3x - 4 ≠ f⁻¹(x)

g(x) is not the inverse of f(x).

4 0
2 years ago
Can someone help please ?
dexar [7]
Average rate of change is defined by (y^-y)/(t^-t) where the ^ means the final(so final y and final t)
So you'd do (8.75-2.75)/(12-4) which is 6/8 which is 3/4 of a dollar per week
3 0
3 years ago
What are three complex fractions that all simplify to one fourth
Margaret [11]
These could be some possible amswers:2/8, 8,32, 3/12
5 0
3 years ago
Skew lines are parallel.
Advocard [28]
Yes i am pretty sure
6 0
3 years ago
3+2 I don't know why they expect a kindergartener to do this hard work
Andrei [34K]
The answer is 5!  Like if you have 3 cookies then add two you would have .. 5!  (: any other questions you need help with?
4 0
3 years ago
Read 2 more answers
Other questions:
  • Lisa can run a mile in 7 minutes. At the rate of speed, how long would it take her to run two kilometers explain pls!!
    10·2 answers
  • Yoshi's age is twice Bart's age plus 3. Yoshi is 13 years old. How old is Bart?
    8·2 answers
  • Find the value of bx9 when b=8
    8·1 answer
  • What is the coefficient of the variable in the expression 2 - 5x - 4 + 8
    7·1 answer
  • A truck can be rented from company A for $100 a day plus $0.20 per mile. Company b charges $80 a day plus $0.30 per mile to rent
    11·1 answer
  • What is a decimal that is equivalent to 5/10?<br> ? Enter the answer in the box.
    10·1 answer
  • Can 7, 8 and 11 be the sides of a right<br> triangle? Justify your answer
    9·1 answer
  • What is the domain of this scatter plot?
    11·1 answer
  • Angela drew Triangle ABC. She dilated Triangle ABC by a scale factor of 13 with the center of dilation at the origin. Then she t
    7·1 answer
  • What is the effect on the graph of the function f(x) = 7x^3 when f(x) is replaced with f(x − 5)?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!