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Maksim231197 [3]
4 years ago
8

Amal worked a total of 30 hours last week on Saturday and Sunday he worked 5 times and many hora than he worked the rest of the

week how many hours did he work of the week
Mathematics
1 answer:
aleksley [76]4 years ago
7 0
6 because 30 divided by5 is 6
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What value of z* should be used to construct a 97 confidence interval of a population mean?
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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.
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  • 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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2 years ago
The isosceles triangle has a perimeter of 7.5 m.
shepuryov [24]
D) 2.1+2x=7.5

All the sides added together will equal the perimeter
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A bag contains 2 red, 5 blue, and 3 green marbles. A marble is chosen at random. What is the probability of NOT choosing a red m
Lapatulllka [165]

Step-by-step explanation:

  1. Number of red = 2
  2. Number of blue = 5
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<h3>probability of not choosing a red marble = 1--choosing a red marble.</h3>

<u>Because</u><u> </u><u>probability</u><u> </u><u>is</u><u> </u><u>always</u><u> </u><u>one</u><u>(</u><u>1</u><u>)</u><u>.</u>

<em>Probability</em><em> </em><em>=</em>

<em>1 -  \frac{2}{10}</em>

<em>\frac{8}{10}</em>

<em>\frac{4}{5}</em>

<em>Is</em><em> </em><em>the</em><em> </em><em>probability</em><em> </em><em>of</em><em> </em><em>not</em><em> </em><em>choosing</em><em> </em><em>a</em><em> </em><em>red</em><em> </em><em>marble</em><em>.</em>

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prohojiy [21]
The two numbers are 39 and 22
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3 years ago
How do you solve 18x+27=117
Nonamiya [84]

Answer:

x = 5

Step-by-step explanation:

18x = 117 - 27

18x = 90

x = 90/18

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