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An emergency service wishes to determine whether a relationship exists between the outside temperature and the number of emergency calls it receives for a 7-hour period. The data are shown.
Temperature (x) - 25 10 27 30 33
No. of calls (y) - 7 4 8 10 11
a) Find the correlation coefficient r
b) Find the regression equation
c) Graph the regression equation.
The list gives the durations, in years, of the top 20 longest-running Canadian television shows.
18 20 38 19 22 23 23 27 36 18 18 18 20 25 18 24 24 33 25 25
Construct a stem-and-leaf plot.
Sam has 6 rose bushes. He counted the flowers on each of them. There are 8, 2, 5, 4, 11 and 9. Find the Standard Deviation. Is 25 a “Usual” number of flowers?
Using the do…while() loop, continuously scan for random integers, but add up only all the positive integers and store the total in one variable.
The loop shall only be terminated when the inputted integer is zero. Afterwards, print out the total of all inputted positive integers.
Continuously ask for floating point values (decimal numbers) using the do…while() loop, sum them all up, and store the total into one variable.
The loop shall only terminate for the following reasons:
A negative decimal number is inputted (but still included in the total sum)
The total sum reaches 100.0 or more
Using a do…while() loop, continuously scan for characters (one per line) and print it out afterwards.
The loop shall terminate due to either of the following reasons:
The inputted character is a vowel
The number of inputted characters has already reached 5.
For the set of data below, determine the 5 number summaries. Construct the resulting box and whisker plot.
5, 3, 8, 6, 1, -10, 3, 9, 7, 4, 5
Using a do...while() loop, continuously scan for random integers that will be inputted by the user and print out its square, separated in each line.
Once the inputted value is 0, it will still print out its square value but should then terminate the loop afterwards. Use this concept in making your loop condition.
Calculate 𝐼1,𝐼2,𝐼3,𝐼4,𝐼5 and 𝐼6.
A charge of +6.0µC experiences a force of 2.0 mN in the +x-direction at a certain point in space. (a) What was the electric field there before the charge was placed there? (b) Describe the force a - 2.0µC charge would experience if it were used in place of the +6.0µC charge.
