The following data represent the lifetimes (in hours) of a
sample of 40 transistors: 112, 121,...
The following data represent the lifetimes (in hours) of a
sample of 40 transistors: 112, 121, 126, 108, 141, 90, 136, 134,
121, 118, 108, 143, 108, 122, 127, 140, 113, 117, 126, 130, 134,
120, 131, 133, 118, 125, 151, 147, 137, 140, 132, 119, 110, 124,
132, 162, 135, 130, 136, 128
a) Give a cumulative relative frequency plot of these data.
b) Treating the cumulative relative frequency plot as the
Cumulative Probability Distribution of an unknown continuous...
A Psychology professor, teaching at a large university, wants to
know whether there is a difference...
A Psychology professor, teaching at a large university, wants to
know whether there is a difference between the IQs of male and
female students in attendance. She randomly and independently
selects 20 female and 20 male students and has them take the IQ
test. The resulting IQ data are as follows:
Female: 130, 117, 124, 120, 125, 109, 100, 118, 127, 130, 126, 118,
131, 104, 130, 116, 122, 115, 129, 117
Male: 106, 114, 134, 120, 107, 131, 133,...
Four different paints are advertised to have the same drying
times. To verify the manufacturer’s claim,...
Four different paints are advertised to have the same drying
times. To verify the manufacturer’s claim, seven samples were
tested for each of the paints. The time in minutes until the paint
was dry enough for a second coat to be applied was recorded. Below
are the results which may be imported into MSExcel for analysis:
(Assume the populations are normally distributed, the populations
are independent and the population variances are equal)
Paint 1
Paint 2
Paint 3
Paint 4...
Four different paints are advertised to have the same drying
times. To verify themanufacturer’s claim, seven...
Four different paints are advertised to have the same drying
times. To verify themanufacturer’s claim, seven samples were tested
for each of the paints. The time in minutes until the paint was dry
enough for a second coat to be applied was recorded. Below are the
results which may be imported into MSExcel for analysis: (Assume
the populations are normally distributed, the populations are
independent and the population variances are equal)
Paint 1 120 112 121 118 118 121 118...
Tomato weights and Fertilizer (Raw Data, Software
Required):
Carl the farmer has three fields of tomatoes,...
Tomato weights and Fertilizer (Raw Data, Software
Required):
Carl the farmer has three fields of tomatoes, on one he used no
fertilizer, in another he used organic fertilizer, and the third he
used a chemical fertilizer. He wants to see if there is a
difference in the mean weights of tomatoes from the different
fields. The sample data for tomato-weights in grams is given below.
Carl claims there is a difference in the mean weight for all
tomatoes between the...
A digital blood pressure gauge is under fire for its inaccuracy,
so the medical association has...
A digital blood pressure gauge is under fire for its inaccuracy,
so the medical association has selected a group of 15 patients.
They were asked to have their (systolic) blood pressure taken first
by an accredited physician (with accurate readings of systolic
pressure), and then to go home and use the digital blood pressure
gauge themselves. The data for the 15 patients tested:
Patient
Physician
Gauge
A
112
126
B
109
108
C
139
116
D
141
123
E
120...