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stiks02 [169]
2 years ago
9

Most dermatologists recommend that the ideal shower lasts approximately 10 minutes. A researcher suspects that the average showe

r length of high school students is greater than 10 minutes. To test the belief, the researcher surveyed 125 randomly selected high school students and found that their average shower length was 14. 7 minutes. With all conditions for inference met, a hypothesis test was conducted at the significance level of α=0. 05, and the test produced a p-value of 0. 0. Which of the following is an appropriate conclusion?
SAT
1 answer:
butalik [34]2 years ago
7 0

The appropriate conclusion of the hypothesis is; The researcher has statistical evidence to conclude that the population mean shower length for high school students is greater than 10 minutes.

<h3>What is the conclusion of the hypothesis?</h3>

We are given;

Sample size; n = 125

Population mean; μ = 10 minutes

Sample Mean; x' = 14.7 minutes

Now, we are told that the hypothesis was carried out and the p-value was 0. Now, the significance level is  α = 0. 05 and this means that the p-value is less than the significance level.

In conclusion, we will reject the null hypothesis and conclude that there is sufficient evidence to conclude that the population mean shower length for high school students is greater than 10 minutes.

Read more about Hypothesis Conclusion at; brainly.com/question/15980493

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The drivetrain engages the gears in the transmission. True False
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Answer:

A transmission is a machine in a power transmission system, which provides controlled application of the power. ... In British English, the term transmission refers to the whole drivetrain, including clutch, gearbox, prop shaft (for rear-wheel drive), differential, and final drive shafts.

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2 years ago
The maximum activity level (which is 1.00) of an enzyme occurs at a pH level of 4 pH units.
Zanzabum

Answer:

O2 affinity depends on the pCO2 and pH.

Higher pH -> Higher O2 affinity -> Higher O2 saturation at higher pH level

Higher pCO2 -> Lower O2 affinity -> Higher O2 saturation at lower pCO2 level

This is a benefit because it allows the affinity of Hb in venous blood conditions (lower pO2, higher pCO2, and lower pH) to be much lower than in arterial conditions. Therefore, when blood goes from arterial to venous, the oxygen concentration decreases much more dramatically due to more oxygen (around 2x) being released to the tissues, which is possible due to the changes in affinity caused by the Bohr effect.

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4 0
2 years ago
a group of 625 students has a mean age of 15.8 years with a standard deviation of 1.2 years. the ages are normally distributed.
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Answer: 16.2-15.8/0.6=0.6667. Use normalcdf() to find the percentage from -999 to 0.6777 which is 0.7476*625=467

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2 years ago
Jeremy was interested in science and math in school. In college, Jeremy studied to become an ecologist who studies the effect of
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4 0
3 years ago
Newton’s law of cooling states that for a cooling substance with initial temperature t0, the temperature t(t) after t minutes ca
antoniya [11.8K]

The cooling rate of the substance is approximately 0.0732.

According to the statement, the Newton's law of cooling is defined by the following formula:

T(t) = T_{s} + (T_{o}-T_{s})\cdot e^{-k\cdot t} (1)

Where:

  • T_{s} - Final temperature, in degrees Celsius.
  • T_{o} - Initial temperature, in degrees Celsius.
  • t - Time, in minutes.
  • k - Cooling rate, in \frac{1}{min}.
  • T(t) - Current temperature, in degrees Celsius.

Please notice that substance reaches thermal equilibrium when T(t) = T_{s}, that is when temperature of the substance is equal to the temperature of surrounding air.

If we know that T_{o} = 80\,^{\circ}C, t = 15\,min, T_{s} = 50\,^{\circ}C and T(15) = 60\,^{\circ}C, then the cooling rate of the substance is:

60 = 50 + (80 - 50)\cdot e^{-15\cdot k}

\frac{60-50}{80-50}= e^{-15\cdot k}

\frac{1}{3} = e^{-15\cdot k}

k = -\frac{1}{15}\cdot \ln \frac{1}{3}

k \approx 0.0732

The cooling rate of the substance is approximately 0.0732.

To learn more on Newton's law of cooling, we kindly invite to check this verified question: brainly.com/question/13748261

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