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
Aleksandr [31]
3 years ago
10

teacher asked her students write down the number of hours studied rounded to the nearest half hour. she complies the results in

develops the probability distribution below for randomly selected student. what is the mean of the probability distribution

Mathematics
1 answer:
Whitepunk [10]3 years ago
8 0

Answer:

1.5

Step-by-step explanation:

The question is incomplete due to the probability distribution table, investigating you can find it so I will attach it.

Having the table, we need to find the mean of the probability distribution, which is defined as the sum of the product of probability and value of random distribution, that is:

M = Sum (xi) * P (xi)

We replace:

M = 0.5 * 0.07 + 1 * 0.2 + 1.5 * 0.46 + 2 * 0.2 + 2.5 * 0.07

M = 1.5

Therefore, the mean of the given table is 1.5

You might be interested in
Indicate in standard form the equation of the line passing through the given point and having the given slope
Naddik [55]
ANSWER


The equation is

y - 5x + 20 = 0


EXPLANATION

Let the equation be
y = mx + c

where
m = 5
is the slope of the line.


We substitute this value to obtain,

y = 5x + c


Since the line passes through
(4,0)
we can use this point to determine the value of c.



We substitute this point to obtain,

0 = 5(4) + c


0 = 20 + c


c =  - 20


Our equation now becomes

y = 5x - 20


We can write this in standard form as


y - 5x + 20 = 0
6 0
3 years ago
a bus is traveling at a constant speed if the bus travels 15 1/2 miles in 1/3 of an hour how many miles will the bus travel in o
Svetradugi [14.3K]

Answer:93/2 or 46 1/2

Step-by-step explanation:

15 1/2 ✖️3

8 0
3 years ago
The diagram shows a triangle.The sizes of the angles, in degrees, arex 30Work out the value ofx.Diagram NOTaccurately drawn
Korvikt [17]
X=25 degrees

2x+3x+x+30 = 180
6x+30 = 180
180 - 30 = 150
6x = 150
150/6 = 25
X = 25
4 0
3 years ago
If u play or know about baseball help me with this
Alenkasestr [34]

Answer:

one hand comes off the bat

3 0
3 years ago
The mayor of a town has proposed a plan for the construction of a new community. A political study took a sample of 800 voters i
Hunter-Best [27]

Answer:

A political strategist wants to test the claim that the percentage of residents who favor construction is more than  30%, so then that represent our claim and needs to be on the alternative hypothesis.

Based on this the correct system of hypothesis are:

Null hypothesis: p \leq 0.3

Alternative hypothesis p >0.3

Step-by-step explanation:

We have the following info given from the problem:

n= 800 the random sample of voters selected from the town

\hat p = 0.34 represent the proportion of residents favored construction

p_o = 0.30 represent the value desired to test.

A political strategist wants to test the claim that the percentage of residents who favor construction is more than  30%, so then that represent our claim and needs to be on the alternative hypothesis.

Based on this the correct system of hypothesis are:

Null hypothesis: p \leq 0.3

Alternative hypothesis p >0.3

And in order to test this hypothesis we can use a one sample z test for a population proportion and the statistic would be given by:

z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}} (1)  

And with the data given we have:

z=\frac{0.34 -0.3}{\sqrt{\frac{0.3(1-0.3)}{800}}}=2.469  

7 0
3 years ago
Other questions:
  • After a holiday dinner, there are 3 1/3 apple pies left and 2 5/6 pumpkin pies left. How much more apple pie than pumpkin pie is
    12·2 answers
  • Kiley had a piece of bamboo skewer that measured 14Three-fifths inches long. She wanted to cut it into toothpicks that were each
    12·2 answers
  • Write an equation of a line in point-slope form that is perpendicular to the line y=1/2x-7 and goes through the point (4,-3)
    6·1 answer
  • Write the phrase as an algebraic expression. A number plus six and three tenths. PLEASE HEEELP
    14·2 answers
  • The parking lot has a total of 60 cars and trucks. The ratio of cars to trucks is 7:3.
    9·2 answers
  • A cone has a diameter of 8ft and height of 3ft. What’s the volume?
    11·2 answers
  • The parent function f(x)=x^3 is transformed to g(x)=x^3+2 and to h(x)=(x+2)^3. both transformations involve the same constant, b
    13·1 answer
  • The level of nitrogen oxides (NOX) in the exhaust after 50,000 miles or fewer of driving of cars of a particular model varies No
    12·1 answer
  • Please help me asapp
    11·1 answer
  • Help pls :)....................
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!