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Shelagh
Questions and answers by visitors named
Shelagh
Questions (24)
The fastest bird is the spine-tailed swift, which reaches speeds of 171 km/h. Suppose that you wish to shoot such a bird with a
2 answers
1,295 views
While cleaning her dorm room, Monica mistakenly pushed three coins off the desk. When they land on the chair below, find the
1 answer
440 views
You start your shift as a cashier with your drawer containing ten $1 bills, 5 $2 bills, three $5 bills, one $10 bill and one
3 answers
1,058 views
At this year's State Fair, there was a dice rolling game. If you rolled two dice and got a sum of 2 or 12, you won $20. If you
2 answers
1,208 views
Four coins fall onto the floor. Find the probability that
(a) exactly three coins land heads up (b) all coins land tails up (c)
4 answers
1,632 views
An aptitude test has a mean of 300 and a standard deviation of 40. The test scores are normally distributed. If 1000 people take
2 answers
604 views
Assume a data set is normally distributed with mean 11 and standard deviation 3. If the data set contains 30 data values,
2 answers
579 views
Assume a data set is normally distributed with mean 182 and standard deviation 30. If the data set contains 600 data values,
2 answers
562 views
Determine whether a correlation coefficient of r = 0.471 is significant at the 5% level for a sample size of 20.
1 answer
417 views
Find the area under the normal distribution curve between z = –0.10 and z = 3.20.
2 answers
576 views
Find the area under the normal distribution curve between z = 0 and z = –0.35.
1 answer
438 views
Find the area under the normal distribution curve between z = 0 and z = 3.20.
1 answer
395 views
Find the area under the normal distribution curve between z = 0.35 and z = 2.95.
3 answers
1,494 views
Find the area under the normal distribution curve to the left of z = –1.50.
3 answers
1,382 views
Find the area under the normal distribution curve to the left of z = 2.35.
3 answers
2,707 views
Find the value for the correlation coefficient r.
x - 21 30 25 24 29 y - 49 41 31 36 39
1 answer
357 views
Suppose the average size (in square feet) of homes in a certain region is 1747. Assume the variable is normally distributed with
1 answer
457 views
The average amount customers at a certain grocery store spend yearly is $784.39. Assume the variable is normally distributed. If
1 answer
488 views
The average hourly wage of employees of a certain company is $14.58. Assume the variable is normally distributed. If the
2 answers
523 views
Use the equation of the regression line to predict y when x = 20.
x - 5 8 6 10 12 9 y - 18 20 15 25 30 25
1 answer
500 views
Use the equation of the regression line to predict y when x = 11.
x - 2 4 3 5 1 y - 9 12 11 14 6
1 answer
409 views
The average hourly wage of employees of a certain company is $14.24. Assume the variable is normally distributed. If the
4 answers
583 views
Find the equation of the regression line.
x - 12 14 10 9 15 8 y - 29 35 28 23 36 18
1 answer
397 views
Find the equation of the regression line and predict y when x = 2.5.
x - 1 5 4 2 3 6 y - 25 5 10 20 15 5
4 answers
2,918 views
