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kap26 [50]
2 years ago
15

A news article reported that college students who have part-time jobs work an average of 15 hours per week. The staff of a colle

ge newspaper thought that the average might be different from 15 hours per week for their college. Data were collected on the number of hours worked per week for a random sample of students at the college who have part-time jobs. The data were used to test the hypotheses
SAT
1 answer:
Vedmedyk [2.9K]2 years ago
7 0

The Confidence Interval of the given random sample survey is gotten as; CI = 13.755 ± 1.456

<h3>What is the confidence Interval?</h3>

We are given the hypotheses as;

Null Hypothesis; H₀: μ = 15

Alternative Hypothesis; Hₐ: μ ≠ 15.

where μ is the mean number of hours worked per week for all students at the college with part-time jobs.

We are told that it has a 95% confidence interval and degree of freedom of df = 25

From the t-table, the t-score = 2.06

The table gives us the standard error as 0.707 and sample mean of 13.755. Thus, we can find the confidence interval as;

CI = 13.755 ± 2.06(0.707)

CI = 13.755 ± 1.456

Read more about Confidence Interval at; brainly.com/question/17097944

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A data set includes body temperatures of healthy adult humans having a mean of f and a standard deviation of f. construct a ​% c
MaRussiya [10]

What the sample suggests is that; the mean body temperature couldvery possibly bevery possibly be 98.6 °F.

<h3>What is the Confidence Interval?</h3>

For a 99% Confidence Interval and DF = 103 - 1 = 102, the value of z = 2.33.

The formula for confidence interval is;

CI = x⁻ ± z(σ/√n))

We are given;

Sample mean; x⁻ = 98.9

standard deviation; σ = 0.67

sample size; n = 103

Thus the confidence Interval is;

CI = [98.9 - 2.33(0.67/√103)], [98.9 + 2.33(0.67/√103)]

CI = (98.9 - 0.154, 98.5 + 0.154)

CI = (98.36, 98.64)

Thus, 98.6 is contained within the 99% CI,and so we can conclude that the the mean body temperature could very possibly bevery possibly be 98.6 °F.

Read more about Confidence Interval at; brainly.com/question/17097944

5 0
2 years ago
What is the value of X?
nevsk [136]

Answer:

<u>x = 7</u>

Explanation:

Because 25 is a perfect square of 5, we can turn

5^{3x - 5} = 25^{x + 1}

into

5^{3x - 5} = 5^{2x + 2}

Since the bases are now both equal, we can completely ignore them, as we are only trying to find x. This leaves us with:

3x - 5 = 2x + 2

All we have to do now is solve for x:

x - 5 = 2          <em>Subtract 2x from both sides.</em>

<u>x = 7</u>                <em>Add 5 to both sides.</em>

<em />

<em />

<em>Hope this helps! :)</em>

6 0
3 years ago
Read 2 more answers
circle the correct terms for the reaction going from left to right. reactant a gains/loses and electron to become product B
Effectus [21]

The question requires one to indicate the correct terms for the reactant from left to right.

<h3>What is a reactant?</h3>

A reactant is a material that enters and changes during a chemical reaction.

1. Reactant A (Gains/Loses) and electron to become product B

To produce B, reactant A loses one electron. The loss of one electron from an atom causes the atom to be oxidized.

Reactant A gives an electron to NAD+ and is transformed to B+ in the given reaction there is an increase in the positive charge. As a result, reactant A is oxidized to produce B+.

2. NAD+ becomes reduced in the process of the reaction.

NAD+ receives the electron given to it by reactant A and is reduced to NADH. As a result, the positive charge of NAD+ decreases.

3. NADH is more reduced than NAD+

NAD+ receives an electron and becomes NADH. As a result, NADH is decreased more than NAD+

4. NAD+ is in the more oxidized state compared to NADH

NAD+ has a surplus of positive charge as opposed to NADH. NAD+ must receive one electron in order to produce NADH. As a result, as opposed to NADH, NAD+ is more oxidized.

5. Reactant A is the electron donor in this reaction.

Reactant A loses one electron, resulting in positively charged B+. This electron is taken up by NAD+, which reduces to NADH. As a result,  the electron donor is reactant A.

6. Reactant A is the reducing agent in this reaction.

A reducing agent is a molecule that can transfer electrons.

Such a molecule has the potential to decrease another molecule while also becoming oxidized. Reactant A is the reducing agent in the given reaction, donating an electron to NAD+.

Following the electron transfer, reactant A is oxidized to product B+, and NAD+ is reduced to NADH.

Learn more about reactant at;
brainly.com/question/26283409
#SPJ1

3 0
2 years ago
The league mean batting average is 0.280 with a known standard deviation of 0.06. The Rattlers and the Vikings belong to the lea
enot [183]

Answer:

ummm

Explanation:

3 0
3 years ago
Which of the promises to settlers listed in the infographic did not appear in the bill of rights?
Alexxandr [17]

The Bill of Rights are firs ten amendments to the United States Constitution which guarantees certain rights to the American public.

As a result of these, there were several promises made to the settlers by the patriots who drafted the BIll of Rights and the Constitution. Some of them include:

  • There would be freedom to practise whatever religion they wanted to
  • There would be fair punishment for any crime
  • There would be a right to fair trial by a jury for any accused, etc

However, one of the promises which was not a part of the Bill of Rights was the <u>end of slavery</u>, however, it was stated that everyone was equal

Please note that you did not add any infographic so i cannot help much, except give a general overview which should help you.

Read more here:

brainly.com/question/20157258

4 0
2 years ago
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