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
Korvikt [17]
3 years ago
11

Suppose commute times in a large city are normally distributed and that 63.70% of commuters in this city take more than 22 minut

es to commute one-way. If the standard deviation of such commutes is 6.3 minutes, what is the mean commute?
Mathematics
1 answer:
USPshnik [31]3 years ago
6 0

Answer:

The mean is 24.205

Step-by-step explanation:

Firstly, we need to get the z-score

From the question, the probability we have is the probability that commuters take more than 22 minutes to commute one-way

So the probability we had was;

P( x > 22)

So we need the z-score corresponding to 63.70% or simply 0.637

We can use the standard normal distribution table to get this

Mathematically, from the standard normal distribution table this is -0.35

z-score = (x- mean)/SD

-0.35 = (22-mean)/6.3

22-mean = -2.205

mean = 22 + 2.205 = 24.205

You might be interested in
Please help
givi [52]

Answer:  C)  4

==========================================================

Explanation:

Let's isolate t

-3 > -3t + 6

-3+3t > 6

3t > 6+3

3t > 9

t > 9/3

t > 3

This means any value can replace t such that it's larger than 3.

Something like t = 1/3 = 0.33 won't work since it's not larger than 3.

But something like t = 4 would work because it makes t > 3 true.

That's why choice C is the final answer.

4 0
3 years ago
How many quarts are in 10 1/2 gallons
Gemiola [76]
10.5 gallons = 42 quarts
1 gallon =  4 quarts
6 0
3 years ago
What is the probability of rolling a number less than 7 on a number cube?
jeyben [28]

Answer:

Each is equally likely (assuming a perfect die). The probability of rolling less than 7 is equal to the probability of rolling 1 or 2 or 3 or 4 or 5 or 6. That is 1/6 + 1/6 + 1/6 + 1/6 + 1/6 + 1/6 = 6/6. Which is 1 or 100%.

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Is the square root of 1,815 rational?
Masja [62]

Answer:

It is not

Step-by-step explanation:

4 0
4 years ago
Read 2 more answers
What is the answer to v-11=8
GREYUIT [131]

Answer

V=19

You put a +11 under the -11 then you can move the +11 to the other side of the equal sign. Then u add them which equals 19.

3 0
4 years ago
Read 2 more answers
Other questions:
  • Help ASSAP with this question.
    12·2 answers
  • Kevin has 3 bags of apples weighing a total of 22 1/2 pounds. Two of the bags weigh 6 3/8 pounds and 3 1/4 pounds. How much does
    10·2 answers
  • What is the slope intercept form of 9x+7y=14?
    5·1 answer
  • You are buying hamburgers and french fries for lunch for you and your friends. It costs $3 for a hamburger and $2 for a basket o
    9·1 answer
  • Write an equation in slope intercept form given the points (2,3) and (-1,-12)
    7·1 answer
  • Evaluate each expression for the given value of the variable. 4(d + 7); d = 2
    12·1 answer
  • $80 decreased by 20%
    15·2 answers
  • A record sells for $7.98. Johann bought one on sale for $5.98. Estimate the amount saved as a percent of the regular price.
    11·1 answer
  • (PLEASE HELP) To feed 7 horses for 4 days, Mark needs 420 kg of grass. How many kilograms of grass does Mark need to feed 9 hors
    10·2 answers
  • 5/8 Divided by 6 5/6
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!