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alekssr [168]
3 years ago
6

G Blue Ribbon taxis offers shuttle service to the nearest airport. You look up the online reviews for Blue Ribbon taxis and find

that there are 17 reviews, six of which report that the taxi never showed up. Is this a biased sampling method for obtaining customer opinion on the taxi service?
a)This is a biased sampling method for obtaining customer opinions because those who take the time to write an online review are likely to do so because they are upset with the service they received.

b) There is not enough information to tell if this is a biased sampling method.

c) This is a biased sampling method for obtaining customer opinions because those who take the time to write an online review are likely to do so because they are satisfied with the service they received.

d) This is not a biased sampling method for obtaining customer opinions because those who take the time to write an online review are choosing to write the review without any incentive.

If this is a biased sampling method, what is the likely direction of the bias?

a) The direction of the bias is likely to underestimate the proportion of customers who have a negative opinion on the service.

b) This is not a biased sampling method.

c) The direction of the bias is likely to overestimate the proportion of customers who have a negative opinion on the service.

d) The direction of the bias is likely to overestimate the proportion of customers who have a positive opinion on the service.
Mathematics
1 answer:
Dominik [7]3 years ago
4 0

Answer:

  1. This is a biased sampling method for obtaining customer opinions because those who take the time to write an online review are likely to do so because they are upset with the service they received.
  2. The direction of the bias is likely to overestimate the proportion of customers who have a negative opinion on the service.

Step-by-step explanation:

1)   There are groups which are not represented in the survey like those who don't use web. And also those who take the time to write an online review are likely to do so because they are upset with the service they received.

2)  Those who had negative experience are more likely to write a review than those who had not.

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Answer:

45% probability that a randomly selected customer saw the advertisement on the internet or on television

Step-by-step explanation:

We solve this problem building the Venn's diagram of these probabilities.

I am going to say that:

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B is the probability that a customer saw the advertisement on television.

We have that:

A = a + (A \cap B)

In which a is the probability that a customer saw the advertisement on the internet but not on television and A \cap B is the probability that the customers saw the advertisement in both the internet and on television.

By the same logic, we have that:

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This means that A \cap B = 0.12

20% saw it on television

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45% probability that a randomly selected customer saw the advertisement on the internet or on television

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Answer:

Dave rode his bicycle 17 miles in the morning

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Step-by-step explanation:

* Lets study the information to solve the question

- Dave rod his bicycle in the morning and again in the afternoon

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  means the distance in the afternoon is 6 more than twice the distance

  in the morning

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* To solve the question let the distance in the morning is x miles

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