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klio [65]
3 years ago
11

Is 7/54 irrationalis 20.455566 irrational is 97.33997 irrational is 5.6213 rational ​

Mathematics
1 answer:
White raven [17]3 years ago
7 0

Answer:

7/54 is rational because it is expressed as a ratio between integers.

20.45... is not irrational because it's written in closed form.

97.33997 is not irrational.

5.6213 is rational.

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What value of z* should be used to construct a 97 confidence interval of a population mean?
Vaselesa [24]

The value of z* should be used to construct a 97 confidence interval of a population mean is 2.17.

<h3>What is confidence interval?</h3>

A degree of uncertainty and certainty in a sample process is measured by confidence intervals. They can choose from a variety of probability limitations, the most frequent becoming a 95% or 99% confidence level.

Some characteristics of confidence interval are-

  • Statistical tools, such as the t-test, are used to compute confidence intervals.
  • Confidence intervals are used by statisticians to quantify uncertainty in such a sample variable.
  • A researcher, for example, may randomly select multiple samples drawn from the same population and compute a confidence interval for every sample to determine how well it might represent the real value of a population variable.
  • The generated datasets are all unique; some intervals contain the genuine population parameter while others do not.

Now, according to the question;

The confidence level is given 97%.

Thus, the crucial value of z for a 97% confidence interval is 2.17, as determined by a z score table, which is as follows:

P(-2.17 < Z < 2.17)=0.97

Therefore the obtained probability for the z-score of 2.17 is 0.97.

To know more about the confidence interval, here

brainly.com/question/15712887

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3 0
1 year ago
0.9x + 2.3x = -6.4<br>I don't understand this lol​
marissa [1.9K]

Answer:

-2

Step-by-step explanation:

0.9x + 2.3x = -6.4

3.2x = -6.4

x = -2

3 0
3 years ago
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Ludmilka [50]

Answer:

Jose makes $4 per hour

Step-by-step explanation:

1. 30x26=780

2. 3120 divide by 780=4

6 0
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malfutka [58]

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Step-by-step explanation:

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Answer:

all work is answer and shown and pictured

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