Question
In: Statistics and Probability
A hairdresser collected data on the number of services provided on Saturdays and on weekdays. Her...
A hairdresser collected data on the number of services provided on Saturdays and on weekdays. Her results are listed below. Assume the two samples were independently taken. Saturday: n1=60 and x1=24 Weekday: n2=45 and x2=15
a) Estimate the difference in the true proportions with a 99% confidence interval.
b) Interpret this interval, in sense what can you conclude about the true difference between these two proportions.
Solutions
orchestra answered 1 year agoRelated Solutions
A hairdresser collected data on the number of services provided on Saturdays and on weekdays. Her...
A hairdresser collected data on the number of services provided
on Saturdays and on weekdays. Her results are listed below. Assume
the two samples were independently taken. Saturday: n1=60 and x1=24
Weekday: n2=45 and x2=15
a) Estimate the difference in the true proportions with a 99%
confidence interval.
b) Interpret this interval, in sense what can you conclude about
the true difference between these two proportions.
The data below collected for the number of at bats and the number of hits in...
The data below collected for the number of at bats and the
number of hits in the world series:
Subject
At Bats
Hits
A
51
19
B
67
25
C
77
30
D
44
20
E
55
23
F
39
16
G
45
18
1. Draw a scatterplot (10 points)
2. Find the correlation coefficient r (45 points)
3. Find the equation of the regression line and graph the
equation on the scatterplot (35 points)
4. How many hits...
Provided set of data are concentrations of suspended solids in river water that are collected for...
Provided set of data are concentrations of suspended solids in
river water that are collected for environmental characteristics.
Total of 36 samples have concentrations of: 84 49 61 40 83 67 45 66
70 69 80 58 68 60 67 72 73 70 57 63 70 78 52 67 53 67 75 61 70 81
76 79 75 76 58 31
a) Construct a stem‐and‐leaf display of the data.
b) Calculate first and third quartiles and median from
stem‐and‐leaf display...
Suppose the following data were collected relating the total number of crimes committed to the number...
Suppose the following data were collected relating the total
number of crimes committed to the number of police officers and if
the town is located in the Southwest. Use statistical software to
find the regression equation. Is there enough evidence to support
the claim that on average there are less crimes in the Southwest
than in other regions of the country at the 0.050.05 level of
significance? If yes, type the regression equation in the spaces
provided with answers rounded...
What are the services provided by TCP? What services are provided by UDP?
What are the services provided by TCP? What
services are provided by UDP?
A hair salon in Cambridge, Massachusetts, reports that on seven randomly selected weekdays, the number of...
A hair salon in Cambridge, Massachusetts, reports that on seven
randomly selected weekdays, the number of customers who visited the
salon were 41, 64, 43, 28, 54, 44, and 56. It can be assumed that
weekday customer visits follow a normal distribution. [You
may find it useful to reference the t table.]
a. Construct the 90% confidence interval for
the average number of customers who visit the salon on weekdays.
(Round intermediate calculations to at
least 4 decimal places, "sample...
As part of her studies, Nightingale collected data on infected persons and learned that the place...
As part of her studies, Nightingale collected data on infected
persons and learned that the place of most infections was in the
combat area. This is an example of
social epidemiology
experimental epidemiology
analytical epidemiolgy
descriptive epidemiology
statistical epidemiology
. A teaching assistant for Statistics course as a university collected data from students in her...
. A teaching assistant for Statistics course as a university
collected data from students in her class to investigate whether
study time per week (average number of hours) differed between
students who planned to go to graduate school and those who did
not. The data were as follows:
Graduate school: 15, 7, 15, 10, 5, 5, 2, 3, 12, 16, 15, 37, 8,
14, 10, 18, 3, 25, 15, 5, 5
No graduate school: 6, 8, 15, 6, 5, 14,...
The following data was collected to explore how the number of square feet in a house,...
The following data was collected to explore how the number of
square feet in a house, the number of bedrooms, and the age of the
house affect the selling price of the house. The dependent variable
is the selling price of the house, the first independent variable
(x1x1) is the square footage, the second independent variable
(x2x2) is the number of bedrooms, and the third independent
variable (x3x3) is the age of the house.
Effects on Selling Price of Houses...
The following data was collected to explore how the number of square feet in a house,...
The following data was collected to explore how the number of
square feet in a house, the number of bedrooms, and the age of the
house affect the selling price of the house. The dependent variable
is the selling price of the house, the first independent variable
(x1) is the square footage, the second independent variable (x2) is
the number of bedrooms, and the third independent variable (x3) is
the age of the house. Effects on Selling Price of Houses...
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