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Mandarinka [93]
2 years ago
15

A trade magazine routinely checks the​ drive-through service times of​ fast-food restaurants. 95​% confidence interval that resu

lts from examining 609 customers in one​ fast-food chain's​ drive-through has a lower bound of 160.8 seconds and an upper bound of 160.8 seconds. What does this​ mean?
Mathematics
1 answer:
Anastaziya [24]2 years ago
8 0

Answer:

z= 1.70 Since the test statistic is less than the critical​ value, we can conclude that the average length of an online video is not more than 8 minutes

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I don’t know how to explain on why the student was incorrect
Zolol [24]

Answer:

the constant proportionality means the ratio between two directly proportional quantities.

so the constant proportionality will be 7.5÷6=1.25 or 10÷8=1.25 or 12.5÷10=1.25

constant proportionality should be same all through because it's a constant

7 0
3 years ago
How would you do these questions?
Pepsi [2]

Step-by-step explanation:

1. P(light OR domestic) = P(light) + P(domestic) − P(light AND domestic)

P(light OR domestic) = 0.62 + 0.70 − 0.55

P(light OR domestic) = 0.77

2. P(light AND not domestic) = P(light) − P(light AND domestic)

P(light AND not domestic) = 0.62 − 0.55

P(light AND not domestic) = 0.07

3. P(light GIVEN not domestic) = P(light AND not domestic) / P(not domestic)

P(light GIVEN not domestic) = 0.07 / (1 − 0.70)

P(light GIVEN not domestic) = 0.233

4. Two events are independent if P(A) × P(B) = P(A and B).

P(light) × P(domestic) = 0.62 × 0.70 = 0.434

P(light AND domestic) = 0.55

Therefore, the type and location are not independent.

3 0
3 years ago
Write a number sentence to represent the model. Explain how you determined the number sentence.
vampirchik [111]

90 % sure

The image attached shows an operation that can be represented with whole numbers, becuase there are positive and negative characters.

So, we know by given that there are +4 circles and -7 circles, and the whole can be expressed as the algebraic sum of them,

Therefore, the model can be represented by the number -3, which is the whole because is the result of the operation that represent each type of element.

hope i helped

-lvr

4 0
3 years ago
WILL MARK BRAINLIEST !!!
iren2701 [21]

Answer:

(-3,3) Hope that this does help!

6 0
2 years ago
8 + (-3) integers topic
dalvyx [7]
If you’re asking for the answer, it’s 5
3 0
2 years ago
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