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Kamila [148]
3 years ago
11

A survey asks students who walk or ride a bike to school whether they live more than one mile from school. The results are shown

in the table. Based on the results, which conclusion is best?

Mathematics
1 answer:
Lera25 [3.4K]3 years ago
7 0

Answer: The only correct option is the first one (top left)

Step-by-step explanation:

let's take each conclussion and see if it is true or not.

a) the number of students that live more than a mile away from school is 42

Of those, 32 ride a bike to reach the school.

The proportion is p = (32/42)*100% = 76.19%

We can round it to the whole number, and have P = 76%

then this statement is true.

b) The number of students that ride a bike is 59, the number of students that live less than a mile away and ride bike is 27, the percentage is:

p = (27/59)*100% = 45.7%

this statement is false.

c) Again, 59 students ride a bike, 32 of them live more than a mile away, the percentage here is:

p = (32/59)*100% = 54.23%

this statement is false.

d) We already find that from the students that live more than a mile away, a 76% ride a bike, so this statement is also false.

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Step-by-step explanation:

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(A) Yes, since the test statistic is in the rejection region defined by the critical value, reject the null. The claim is the alternative, so the claim is supported.

Step-by-step explanation:

Null hypothesis: The wait time before a call is answered by a service representative is 3.3 minutes.

Alternate hypothesis: The wait time before a call is answered by a service representative is less than 3.3 minutes.

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significance level = 0.08

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Step-by-step explanation:

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