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lutik1710 [3]
3 years ago
5

Hank's speedometer reads 60 miles per hour, but during a road test he finds that he was actually driving 50 miles per hour. What

is the percent error in Hank's speedometer?
Mathematics
2 answers:
zhenek [66]3 years ago
4 0
The percent error in the speeds are 7.1428. Hope this helps!
pochemuha3 years ago
4 0

Answer:  The speedometer read Hank's miles per hour as 20% more than the miles per hour that he actually drove.

Explanation: 20% of 50 which is the miles per hour he actually drove is 10 and 50 + 10 = 60 which is the incorrect miles per hour his speedometer read.

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A sample of students from an introductory psychology class were polled regarding the number of hours they spent studying for the
Anni [7]

Answer:

8.68,13.16

Step-by-step explanation:

Hint- First we have to calculate the mean and standard deviation of the sample and then applying formula for confidence interval we can get the values.

Mean of the sample is,

\mu=\dfrac{\sum _{i=1}^{24}a_i}{24}=\dfrac{262}{24}=10.92

Standard deviation of the sample is,

\sigma =\sqrt{\dfrac{\sum _{i=1}^{24}\left(x_i-10.92\right)^2}{24-1}}=5.6

The confidence interval will be,

=\mu \pm Z\dfrac{\sigma}{\sqrt{n}}

Here,

Z for 95% confidence interval is 1.96, and n is sample size which is 24.

Putting the values,

=10.92 \pm 1.96\cdot \dfrac{5.6}{\sqrt{24}}

=10.92 \pm 2.24

=8.68,13.16

Confidence interval is used to express the degree of uncertainty associated with a sample.

95% confidence interval means that if we used the same sampling method to select different samples and calculate an interval, we would expect the true population parameter to fall within the interval for 95% of the time.

5 0
3 years ago
In Ms. Chance's first period class, there are 9 students with hazel eyes, 10 with brown eyes, 7 with blue eyes, and 2 students w
MA_775_DIABLO [31]
Brown eyes because most students have brown eyes. It would be less likely to get a student with blue or green eyes.
5 0
2 years ago
Consider the cylinder with a volume of 132π cm3. A cylinder with volume of 132 pi centimeters cubed. What is the volume of a con
vagabundo [1.1K]

Answer:

44 pi centimeters cubed

Step-by-step explanation:

Since, base radius and height of cone are equal to to that of cylinder. Hence,

Volume \:  of  \: cone   \\ =  \frac{1}{3}  \times Volume \: of \: cylinder \\ =  \frac{1}{3}  \times132\pi  \\ = 44\pi \:  {cm}^{3}

4 0
3 years ago
Read 2 more answers
What is 44.84 times 9.84 =<br> what is 88.6 times5.01
slega [8]
44.85 * 9.84 = 441.2256

88.6 * 5.01 = 443.886
6 0
3 years ago
If you want a tutor I will help for free
Dimas [21]
What kind of subject do you tutor in ? c:
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3 years ago
Read 2 more answers
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