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
lbvjy [14]
2 years ago
6

Suppose the weekly amount of money spent on maintenance and repairs by a company is NOT approximately normally distributed. Howe

ver, its mean and standard deviation are known to be $400 and $20, respectively. If $450 is budgeted for next week, what can you say about the probability that the actual costs will exceed the budgeted amount
Mathematics
1 answer:
UNO [17]2 years ago
8 0

Answer:

Probability = 0.00621

Step-by-step explanation:

We are given;

Population mean; μ = 400

Population standard deviation; σ = 20

Raw score; x¯ = 450

the probability that the actual costs will exceed the budgeted amount will be the p-value.

Thus, let's first find the z-score after which we will find the p-value.

z = (x¯ - μ)/σ

z = (450 - 400)/20

z = 50/20

z = 2.5

From online p-value from z-score calculator attached, using z = 2.5; one tailed hypothesis; significance level of 0.05, we have;

P-value = 0.00621

You might be interested in
If A and B are independent events, then it must be true that P(BIA) = P(A).
Maksim231197 [3]

Answer:

  B.  False

Step-by-step explanation:

For independent events, it must be true that ...

  P(B|A) = P(B)

__

The probability of B does not depend on A. That is what makes them independent.

5 0
3 years ago
Which of the following is a correct definition of conditional probability?
Rom4ik [11]

Answer:

Conditional probability is defined as the likelihood of the occurrence of an event or outcome, based on the occurrence of a previous event or outcome.

Step-by-step explanation:

7 0
3 years ago
A portable electronic typewriter cost £180 in 1988. Its price rose by 5% in 1989. What was the new price?
elena-s [515]

\bf \begin{array}{|c|ll} \cline{1-1} \textit{a\% of b}\\ \cline{1-1} \\ \left( \cfrac{a}{100} \right)\cdot b \\\\ \cline{1-1} \end{array}~\hspace{5em}\stackrel{\textit{5\% of 180}}{\left( \cfrac{5}{100} \right)180}\implies 9~\hfill \stackrel{\textit{new price}}{180+9\implies 189}

5 0
3 years ago
Which is greater 2 2/3, 2.45, 2 2/5
timofeeve [1]

This is least to greatest

2 2/5 or 2.40

2.45

2 2/3

2 2/5 , 2.45 , 2 2/3

7 0
2 years ago
Read 2 more answers
I need help with this question i dont understand it
RUDIKE [14]
The perimeter, by definition, is the outside measure of that figure. MN and LM are the same length and LK and NK are the same length....we just need to find the lengths! Use the distance formula to find the distance between the 2 points:
\sqrt{( x_{2} - x_{1} ) ^{2} +( y_{2}- y_{1} ) ^{2}  }
For the segment MN, use the coordinates of M as your x1, y1, and use the coordinates of N for x2, y2:
\sqrt{(3-2) ^{2}+(4-3) ^{2}  }
which simplifies to
\sqrt{(1 )^{2}+(1) ^{2}  } which is \sqrt{2}
So that is the length of both MN and LM.  So far our perimeter is \sqrt{2} + \sqrt{2}=2 \sqrt{2}
Now let's use the same formula to find out the length of one of the longer segments:
\sqrt{(5-3) ^{2} +(3-2) ^{2} }
which simplifies down to
\sqrt{(2) ^{2} +(1) ^{2} }
which is of course \sqrt{5}
Since we have 2 of those lengths, \sqrt{5} + \sqrt{5}=2 \sqrt{5}
So our perimeter is, in the end, 2 \sqrt{2}+2 \sqrt{5}
That's the third choice down
7 0
2 years ago
Other questions:
  • Pat's Pizza made 21 cheese pizzas, 14 veggie pizzas, 23 pepperoni pizzas, and 14 sausage pizzas yesterday. Based on this data, w
    6·1 answer
  • What is the explicite to 19,13,7,1,...
    7·1 answer
  • Explain this story problem. There are 20 students in each class. There are 4 of the classes. How many students are there?
    9·1 answer
  • Find the value of x to the nearest tenth.
    9·2 answers
  • 10x - y = 2<br> 5x + 3y = 5 --
    14·1 answer
  • <img src="https://tex.z-dn.net/?f=4.5%20%5Cdiv%203%203%20%5Cdiv%204" id="TexFormula1" title="4.5 \div 3 3 \div 4" alt="4.5 \div
    10·2 answers
  • What is f(3) if f(x) = 2x + 1?​
    10·2 answers
  • 3/5 X 7/2 as a mixed number
    11·2 answers
  • Why is it so hard for people to learn math?
    11·2 answers
  • Zion collected leaves for a class
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!