Claire boarded an airplane in Richmond va and flew 414 miles directly to Charleston sc. The total flight time was 3/4 hour. How
2 answers:
Answer: 552 mph
Step-by-step explanation:
The formula to find speed is given by :-
Given : Claire boarded an airplane in Richmond va and flew 414 miles directly to Charleston sc.
Distance = 414 miles.
The total flight time was hour.
Then, the speed of Claire's airplane=
Hence, the speed of Claire's airplane= 552 mph.
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Answer:
Step-by-step explanation:
Hello!
X: number of absences per tutorial per student over the past 5 years(percentage)
X≈N(μ;σ²)
You have to construct a 90% to estimate the population mean of the percentage of absences per tutorial of the students over the past 5 years.
The formula for the CI is:
X[bar] ± *
⇒ The population standard deviation is unknown and since the distribution is approximate, I'll use the estimation of the standard deviation in place of the population parameter.
Number of Absences 13.9 16.4 12.3 13.2 8.4 4.4 10.3 8.8 4.8 10.9 15.9 9.7 4.5 11.5 5.7 10.8 9.7 8.2 10.3 12.2 10.6 16.2 15.2 1.7 11.7 11.9 10.0 12.4
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[10.41±1.645*]
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Using a confidence level of 90% you'd expect that the interval [9.26; 11.56]% contains the value of the population mean of the percentage of absences per tutorial of the students over the past 5 years.
I hope this helps!