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lubasha [3.4K]
4 years ago
12

Identify the explanatory variable and response variable in each of the studies

Mathematics
1 answer:
blondinia [14]4 years ago
8 0

Answer:

Step-by-step explanation:

Answer:

a) Explanatory variable is the study of cell phone usage while the response variable is the risk of brain cancer

b) Explanatory variable is the Records of more than three-quarters of a million surgical procedures conducted at 34 different hospitals, while the response variable is the mortality rate

c) Explanatory variable is the type of treatment given (Salk polio vaccine or a saline placebo injection) while the response variable is the polio rate.

Step-by-step explanation:

Explanatory variable are the variable been studied in a research while the response variable are the effects ( either positive or negative) of the explanatory variable that is studied.

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The claim is that the white blood cell counts of adult females are normally​ distributed, with a standard deviation equal to 1.6
maxonik [38]

Answer:

78.46

Step-by-step explanation:

Given that

Pop. Standard deviation = 1.61

Sample standard deviation = 2.15

Sample mean = 7.47

Sample size = 45

Recall that

Test stat for chi square

= (n - 1) (sample standard dev/pop standard dev)^2

= 45 - 1 (2.15/1.61)^2

= 44(1.3354)^2

= 44 × 1.78329

= 78.46

4 0
4 years ago
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Simplify the expression. n+3(n−1)
puteri [66]

Answer:

4n - 3

Step-by-step explanation:

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3 0
2 years ago
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Please help with this problem
Y_Kistochka [10]

Answer:

C. equilateral

Step-by-step explanation:

Since each of the angles of Triangle ABC have equivalent values (each are 60 degrees), each of the sides also must have equivalent values.

Thus, since all three sides are the same length, the triangle created is equilateral.

Have a nice day! ^-^

7 0
3 years ago
A recipe calls for 2 1/3 cups of flour and 1 1/4 cups of sugar. If the recipe is tripled, how much flour and sugar will be neede
snow_tiger [21]
2 1/3*3

7/3 *3 

21/3

7 cups of flour

1 1/4

5/4*3

15/4

3 3/4 cups of sugar 
6 0
4 years ago
During a sale, a winter jacket is marked down from $68 to a sale price of $44.20. What is the percent markdown?
Evgen [1.6K]

Answer:

the answer. for your question is 35%

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3 years ago
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