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Nata [24]
3 years ago
12

Can someone please help me out with this question I really need help with this

Mathematics
1 answer:
jenyasd209 [6]3 years ago
6 0

Answer:

all real numbers for both

Step-by-step explanation:

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A sample from 16 shortstops was obtained in an effort to determine whether shortstops have higher salaries than other players. T
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1.16 to 2.75

Step-by-step explanation:

The mean salary (millions of dollars) for shortstops was 1.95.

\bar{x}=1.85

The population mean for all baseball players was 1.85

\mu = 1.85

The population standard deviation was 1.61.

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Formula of confidence interval :x-z\times \frac{\sigma}{\sqrt{n}} to x+z\times \frac{\sigma}{\sqrt{n}}

z at 95% confidence level = 1.96

Substitute the values in the formula

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Hence the 95 percent confidence interval for these data is 1.16 to 2.75

8 0
3 years ago
A sample of a radioactive substance decayed to 97% of its original amount after a year. (Round your answers to two decimal place
Alborosie

Answer:

23 years

Step-by-step explanation:

Step 1: Calculate the rate constant (k) for the radioactive decay

A radioactive substance with initial concentration [A]₀ decays to 97% of its initial amount, that is, [A] = 0.97 [A]₀, after t = 1 year. Considering first-order kinetics, we can calculate the rate constant using the following expression.

ln [A]/[A]₀  = - k.t

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C.

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