the manager of an amusement park would like to be able to predict daily attendance in order to develop more accurate plans about how much food to order and how many ride operators to hire. after some consideration, he decided the following three factors are critical: 1. Yesterday's attendance 2. Weekday or Weekend 3. Predicted Weather He then took a random sample of 40 days. For each day, he recorded the attendance, day of the week, and weather forecast. The first independent variable is interval, but the other two are nominal. Accordingly, he created the following sets of indicator variables:
I1 = 1- (IF WEEKEND) 0 - (IF NOT)
I2 = 1 - (IF MOSTLY SUNNY IS PREDICTED) 2 - (IF NOT)
I3 = 1 - (IF RAIN IS PREDICTED) 2 - (IF NOT)
A. Conduct regression analysis
B. Is model valid? Explain
C. Can we conclude weather is a factor in determining attendance
D. Do these results provide sufficient evidence that weekend attendance is, on average, larger than weekday attendance?
I will attach data in another question
In: Statistics and Probability
#1. [Water Slide & Swing] You are designing a slide for a water park. In a sitting position, park guests slide a vertical distance h down the water slide, which has negligible friction. When they reach the bottom of the slide, they grab a handle at the bottom end of a 6.00-m-long uniform pole. The pole hangs vertically, initially at rest. The upper end of the pole is pivoted about a stationary, frictionless axle. The pole with a person hanging on the end swings up through an angle theta max , and then the person lets go of the pole and drops into a pool of water. Treat the person as a point mass. The pole’s moment of inertia is given by I = (1/3)ML , where L = 6.00 m is the length of the pole and M = 24.0 kg is its mass. In your design, a person of mass m = 70.0 kg is to have a maximum angle of swing of theta max = 72.0˚ after their collision with the pole.
(a) In the "collision" between the slider and the pole, why is angular momentum about the pole's pivot conserved, but linear momentum and kinetic energy are not conserved? Assume that the slider is moving horizontally when they grab the handle on the vertically hanging pole.
(b) What is the angular speed of rotation of the pole & swinger just after the swinger grabs on, in terms of the final height the swinger reaches?
(c) What is the speed of the swinger at the bottom of the slide just before reaching the pole, in terms of their speed just after grabbing the pole?
(d) For a person of mass m = 70.0 kg, what must be the starting height h in order for the pole with person to have a maximum angle of swing of theta max = 72.0˚ after the collision?
In: Physics
For questions 5 – 6, assume that to ride the Whirling Dervish at an amusement park, riders must be no taller than 75 in. Assume that men have normally distributed heights with a mean of 70 in. and a standard deviation of 2.8 in. 5. Find the percentage of men who will not meet the height requirement. Round to two percentage decimal places (for example, 38.29%). 6. If the height requirement is changed so that only the tallest 5% of men will be excluded from riding the Whirling Dervish due to height restrictions, what is the new height limit? Round to the nearest inch.
In: Statistics and Probability
For questions 5 – 6, assume that to ride the Whirling Dervish at an amusement park, riders must be no taller than 75 in. Assume that men have normally distributed heights with a mean of 70 in. and a standard deviation of 2.8 in. 5. Find the percentage of men who will not meet the height requirement. Round to two percentage decimal places (for example, 38.29%). 6. If the height requirement is changed so that only the tallest 5% of men will be excluded from riding the Whirling Dervish due to height restrictions, what is the new height limit? Round to the nearest inch.
In: Statistics and Probability
The following data show the length of the coasters at the Mega Park (x) and height of the same coasters (y). The regression equation for the data is given by y = 21.94 + 0.018x
|
Length |
Height |
|
1377 |
49 |
|
4424 |
112 |
|
3403 |
80 |
|
2780 |
45 |
|
3196 |
90 |
|
2000 |
41 |
|
790 |
28 |
|
2671 |
50 |
|
3450 |
100 |
|
2037 |
80 |
|
2134 |
80 |
|
679 |
28 |
|
1214 |
50 |
|
6072 |
120 |
a. State and interpret the slope in the context of this problem, given the regression equation above.
b. How tall does the linear regression model predict a coaster of 3450 feet long will be?
c. Find and interpret the residual for the coaster which is 3450 feet long and has a height of 100 feet?
In: Statistics and Probability
In: Statistics and Probability
The manager of an amusement park would like to be able to
predict daily attendance in order to develop more accurate plans
about how much food to order and how many ride operators to hire.
After some consideration, he decided that the following three
factors are critical:
Yesterday’s attendance
Weekday or weekend (1 if weekend, 0 if weekday)
Predicted weather
Rain forecast ( 1 if forecast for rain, 0 if not)
Sun ( 1 if mostly sunny, 0 if not)
He then took a random sample of 40 days. For each day, he recorded
the attendance, the previous day’s attendance, day of the week, and
weather forecast. An example of the first few lines of Data and the
regression output are below:
Attendance Yest Att I1
I2 I3
7882 8876 0 1
0
6115 7203 0 0
0
5351 4370 0 0
0
8546 7192 1 1 0
SUMMARY OUTPUT
Regression Statistics
Multiple R 0.836766353
R Square 0.700177929
Adjusted R Square 0.665912549
Standard Error 810.7745532
Observations 40
ANOVA
df SS MS
F Significance F
Regression 4 53729535
13432384 20.43398
9.28E-09
Residual 35 23007438
657355.4
Total 39 76736973
Coefficients Standard
Error t Stat P-value Lower
95% Upper 95%
Intercept 3490.466604 469.1554
7.439894 1.04E-08 2538.031
4442.903
Yest Att 0.368547078 0.077895
4.731349 3.6E-05 0.210412
0.526682
I1 1623.095785 492.5497
3.295294 0.002258 623.1668
2623.025
I2 733.4646317 394.3718
1.85983 0.071331 -67.1527
1534.082
I3 765.5429068 484.6621
-1.57954 0.123209 -1749.46
218.3734
Test to see if the model is valid. Use alpha = .05
Can we conclude that weather is a factor in determining
attendance?
If the manager is looking for a way to help predict attendance, Is
this a good model to use? How would you suggest making this model
better?
please give proper details for the answer. Thank you
In: Statistics and Probability
The manager of an amusement park would like to be able to predict daily attendance in order to develop more accurate plans about how much food to order and how many ride operators to hire. After some consideration, he decided that the following three factors are critical: Yesterday’s attendance Weekday or weekend Predicted weather He then took a random sample of 36 days. For each day, he recorded the attendance, the previous day’s attendance, day of the week, and weather forecast(mostly sunny, rain, cloudy). The first independent variable is interval, but the other two are nominal. a. Create the three indicator variables you need. b. Conduct a regression analysis. c. Is this model valid? Explain. d. Can we conclude that weather is a factor in determining attendance? e. Do these results provide sufficient evidence that weekend attendance is, on average, larger than weekday attendance? f. Do these results provide sufficient evidence that mostly sunny attendance is, on average, larger than cloudy attendance?
| Attendance | Yest Att | day of the week | weather forecast |
| 7882 | 8876 | 2 | 1 |
| 6115 | 7203 | 2 | 3 |
| 5351 | 4370 | 2 | 3 |
| 8546 | 7192 | 1 | 1 |
| 6055 | 6835 | 2 | 3 |
| 7367 | 5469 | 2 | 1 |
| 7871 | 8207 | 2 | 1 |
| 5377 | 7026 | 2 | 3 |
| 5259 | 5592 | 2 | 1 |
| 4915 | 3190 | 2 | 3 |
| 6538 | 7012 | 2 | 3 |
| 6607 | 5434 | 2 | 3 |
| 5118 | 3764 | 2 | 3 |
| 6077 | 7575 | 2 | 3 |
| 4475 | 6047 | 2 | 3 |
| 3771 | 4430 | 2 | 3 |
| 6106 | 5697 | 2 | 3 |
| 7017 | 3928 | 1 | 2 |
| 5718 | 5552 | 2 | 3 |
| 5966 | 3142 | 1 | 2 |
| 8160 | 8648 | 1 | 2 |
| 4717 | 3397 | 2 | 3 |
| 7783 | 7655 | 2 | 3 |
| 5124 | 5920 | 2 | 3 |
| 7495 | 7831 | 1 | 2 |
| 5848 | 6355 | 2 | 3 |
| 5166 | 3529 | 2 | 3 |
| 4487 | 4220 | 2 | 3 |
| 7320 | 7526 | 2 | 1 |
| 6925 | 4083 | 1 | 1 |
| 8133 | 6382 | 1 | 1 |
| 7929 | 6459 | 2 | 3 |
| 7291 | 3432 | 1 | 2 |
| 5419 | 8077 | 2 | 3 |
| 3634 | 3353 | 2 | 3 |
| 6859 | 3803 | 1 | 2 |
| 1 weekend | 1 mostly sunny | ||
| 2 weekdays | 2 rain | ||
| 3 cloudy |
In: Statistics and Probability
A man is hiking at a park. At the beginning, he followed a straight trail. From the starting point, he traveled two miles down the first trail. Then he turned to his left by 30 degree angle to follow a second trail for one point five miles. Next, he turned to his right by 160 degree angle and follow a third trail for one point seven miles. At this point he was getting very tired and would like to get back as quickly as possible, but all of the available trails seem to lead him deeper into the woods. He would like to take a shortcut directly through the woods. How far to his right should you suggest him to turn, and how far do he have to walk, to go directly back to his starting point?
Q1: The man has to turn ____ degree to the right and walk ___ miles to the starting point.
In: Physics
The health of the bear population in a park is monitored by periodic measurements taken from anesthetized bears. A sample of the weights of such bears is given below. Find a 95% confidence interval estimate of the mean of the population of all such bear weights. The 95% confidence interval for the mean bear weight is the following.
data table 80 344 416 348 166 220 262 360 204 144 332 34 140 180
In: Math