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Bad White [126]
3 years ago
5

An automobile producing company operates car dealerships that sell its cars. In order to assess the service costumers get at the

dealerships a team from the Customer Relationship Department was assembled. The team was sent to 20 randomly selected dealerships. Each dealership was visited once by the team for an entire working day. During a visit the team interviewed all the customers that arrived at the that dealership. One of the questions that each of the customers were asked is: "Do you currently possess a car made by our company?
Mathematics
1 answer:
harina [27]3 years ago
4 0

Answer:

Step-by-step explanation:

Hello!

The objective of this experiment is to assess the service customers receive at the dealerships.

1) The population in this survey is:

The population is the customers of car dealerships.

2) The sample in this survey is:

The random sample taken was 20 selected car dealerships, where the customers were surveyed.

3) A parameter that may be targeted by the survey is:

To study the service the customers receive at the dealerships and if it has any influence in the customers owning or not a car of the company, one parameter to study is the population proportion of customers that own a car of the company vs the proportion of customers that are satisfied with the service received.

4) A statistic that may be used to summarize the outcome of the survey is:

The statistic to use to summarize the outcome of the survey is the sample proportion.

I hope it helps!

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An urn contains 5 red balls and 2 green balls. Two balls are drawn one after the other. What is the probability that the second
AleksAgata [21]

Answer:

<em>The probability that the second ball is red is 71%</em>

Step-by-step explanation:

<u>Probabilities</u>

We know there are 5 red balls and 2 green balls. Let's analyze what can happen when two balls are drawn in sequence (no reposition).

The first ball can be red (R) or green (G). The probability that it's red is computed by

\displaystyle P(R)=\frac{5}{7}

The probability is's green is computed by

\displaystyle P(G)=\frac{2}{7}

If we have drawn a red ball, there are only 4 of them out of 6 in the urn, so the probability to draw a second red ball is

\displaystyle P(RR)=\frac{5}{7}\cdot \frac{4}{6}=\frac{10}{21}

If we have drawn a green ball, there are still 5 red balls out of 6 in the urn, so the probability to draw a red ball now is

\displaystyle P(GR)=\frac{2}{7}\cdot \frac{5}{6}=\frac{5}{21}

The total probability of the second ball being red is

\displaystyle P(XR)=\frac{10}{21}+\frac{5}{21}=\frac{5}{7}=0.71

The probability that the second ball is red is 71%

7 0
3 years ago
Each day Donna and Mary toss a coin to see who buys the other person coffee ​($2.34 a​ cup). One tosses and the other calls the
netineya [11]

Answer:

yes

Step-by-step explanation:

Each day Donna and Mary toss a coin to see who buys the other person coffee ​($2.34 a​ cup). One tosses and the other calls the outcome. If the person who calls the outcome is​ correct, the other buys the​ coffee; otherwise the caller pays. Assume that an honest coin is​ used, that Mary tosses the​ coin, and that Donna calls the outcome.

7 0
3 years ago
How is mathematics done?​
Ad libitum [116K]

Answer:

Mathematics can be completed through the use of logical thinking and the use of equations to figure out various problems.

8 0
3 years ago
Read 2 more answers
What is the inverse of the function h(x)=\dfrac{5}{2}x+4h(x)= 2 5 ​ x+4h, left parenthesis, x, right parenthesis, equals, start
Phantasy [73]

Answer:

The inverse of the function h(x) is h^{-1}(x)=\frac{2}{5}x-\frac{8}{5}.

Step-by-step explanation:

The given function is

h(x)=\dfrac{5}{2}x+4

Replace h(x) by y.

y=\dfrac{5}{2}x+4

Interchange x and y.

x=\dfrac{5}{2}y+4

Subtract 4 from both sides to isolate variable y,

x-4=\dfrac{5}{2}y

Multiply both sides by 2.

2x-8=5y

Divide both sides by 5.

\frac{2}{5}x-\frac{8}{5}=y

Replace y by h⁻¹(x).

h^{-1}(x)=\frac{2}{5}x-\frac{8}{5}

Therefore the inverse of the function h(x) is h^{-1}(x)=\frac{2}{5}x-\frac{8}{5}.

6 0
3 years ago
Read 2 more answers
There are 268 cars, lorries and motorcycles in a car park.
Firdavs [7]

Answer:

cars=186           lorries=62

Step-by-step explanation:

total vehicles=268

cars=3 x lorries

motorcycle=20

lories=?

number of cars and lorries=268-20/4

                                            =62

cars=62 x 3 = 186

lorries=62

hope this helps u =)

8 0
3 years ago
Read 2 more answers
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