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Viefleur [7K]
3 years ago
8

A study published in the journal Environmental Health found that flight attendants get cancer more often than the general popula

tion. The 5,3665{,}3665,3665, comma, 366 flight attendants in the study had higher incidence rates for every type of cancer examined, even though they had relatively lower rates of smoking and obesity. What type of study is this, and what is the response variable? Choose 1 answer: Choose 1 answer: (Choice A) A An observational study where the incidence rate of cancer is the response variable (Choice B, Checked) B An observational study where type of person (flight attendant or not) is the response variable (Choice C) C An experiment where where incidence rate of cancer is the response variable (Choice D) D An experiment where type of person (flight attendant or not) is the response variable
Mathematics
1 answer:
bija089 [108]3 years ago
3 0

Answer:

Step-by-step explanation:

Idk the answer

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Help on test pls! asap!!
Tanzania [10]

Answer:

1) D it doesn't pass the line test

2)B

3)A C F

4 0
2 years ago
What is "The relationship between time and the distance Remaining on a 3 mile walk for someone walking at a steady rate of 2 mph
FromTheMoon [43]

Answer:

Let d be the remaining distance.

Let t be the remaining time.

The standard distance equation is:

d = rt

We are given the rate as 2, so:

d = 2t

At the start of the walk, the remaining distance is 3 miles.

The remaining time is 1.5 hours.

At the end of the walk, the remaining distance is 0 miles.

The remaining time is 0 hours.

A graph of the distance and time would be a continuous, solid line. That's because the walker will be at every distance between 3 and 0 and every time between 1.5 and 0.

Answer:

The graph of this would be a solid line

5 0
3 years ago
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Artist 52 [7]

Answer:

ITS 8 x 4 = 32 OK REEE

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Suppose a local manufacturing company claims their production line has a variance of less than 9.0. A quality control engineer d
Alexxx [7]

Answer:

\chi^2 =\frac{35-1}{9} 2.12^2 =16.979

p_v =P(\chi^2

If we compare the p value and the significance level provided we see that p_v so on this case we have enough evidence in order to reject the null hypothesis at the significance level provided. And that means that the population variance is significantly lower than 9

Step-by-step explanation:

Notation and previous concepts

A chi-square test is "used to test if the variance of a population is equal to a specified value. This test can be either a two-sided test or a one-sided test. The two-sided version tests against the alternative that the true variance is either less than or greater than the specified value"

n=35 represent the sample size

\alpha=0.01 represent the confidence level  

s =2.12 represent the sample deviation obtained

\sigma_0 =3 represent the value that we want to test

Null and alternative hypothesis

On this case we want to check if the population variance specification is lower than 9 and the deviation lower than 3, so the system of hypothesis would be:

Null Hypothesis: \sigma^2 \geq 9

Alternative hypothesis: \sigma^2

Calculate the statistic  

For this test we can use the following statistic:

\chi^2 =\frac{n-1}{\sigma^2_0} s^2

And this statistic is distributed chi square with n-1 degrees of freedom. We have eveything to replace.

\chi^2 =\frac{35-1}{9} 2.12^2 =16.979

Calculate the p value

In order to calculate the p value we need to have in count the degrees of freedom , on this case df= n-1= 35-1=34. And since is a left tailed test the p value would be given by:

p_v =P(\chi^2

In order to find the p value we can use the following code in excel:

"=CHISQ.DIST(16.979,34,TRUE)"

Conclusion

If we compare the p value and the significance level provided we see that p_v so on this case we have enough evidence in order to reject the null hypothesis at the significance level provided. And that means that the population variance is significantly lower than 9

6 0
3 years ago
Bowl A contains three red and two white chips, and bowl B contains four red and three white chips. A chip is drawn at random fro
____ [38]

\Large \text {Answer:}

\large \boxed {\dfrac{23}{40}}

\Large \text {Step-by-step explanation:}

\text{P}_{B}(r) = \text{P}_{A}(r) \cdot \text{P}_{B}(r) + \text{P}_{A}(w) \cdot \text{P}_{B}(r)

\text{P}_{B}(r) = \left (\dfrac{3}{5} \right ) \negthickspace \left(\dfrac{5}{8}\right ) + \left (\dfrac{2}{5} \right ) \negthickspace \left (\dfrac{4}{8} \right )

\text{P}_{B}(r) = \dfrac{23}{40}

4 0
2 years ago
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