Introduction To Statistics And Data Analysis
6th Edition
ISBN: 9781337793612
Author: PECK, Roxy.
Publisher: Cengage Learning,
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Textbook Question
Chapter 4, Problem 64CR
Although bats are not known for their eyesight, they are able to locate prey (mainly insects) by emitting high-pitched sounds and listening for echoes. A paper appearing in Animal Behaviour (“The Echolocation of Flying Insects by Bats” [1960]: 141–154) gave the following distances (in centimeters) at which a bat first detected a nearby insect:
- a. Calculate the sample
mean distance at which the bat first detects an insect. - b. Calculate the sample variance and standard deviation for this data set. Interpret these values.
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Health care workers who use latex gloves with glove powder on a daily basis are particularly susceptible to developing a latex allergy. Each in a sample of 47 hospital employees who were
diagnosed with a latex allergy based on a skin-prick test reported on their exposure to latex gloves. Summary statistics for the number of latex gloves used per week are x = 19.7 and s = 12.1.
Complete parts (a)-(d).
a. Give a point estimate for the average number of latex gloves used per week by all health care workers with a latex allergy.
19.7
b. Form a 95% confidence interval for the average number of latex gloves used per week by all health care workers with a latex allergy.
(16.24, 23.16)
(Use integers or decimals for any numbers in the expression. Round to two decimal places as needed.)
c. Give a practical interpretation of the interval, part (b).
OA. One can be 95% confident that the average number of latex gloves used per week by all healthcare workers with
latex allergy is greater than the…
Health care workers who use latex gloves with glove powder on a daily basis are particularly susceptible to developing a latex allergy. Each in a sample of 44 hospital employees who were diagnosed with a latex allergy based on a skin-prick test reported
on their exposure to latex gloves. Summary statistics for the number of latex gloves used per week are x= 19.4 and s = 11.7. Complete parts (a) - (d).
a. Give a point estimate for the average number of latex gloves used per week by all health care workers with a latex allergy.
b. Form a 95% confidence interval for the average number of latex gloves used per week by all health care workers with a latex allergy.
(Use integers or decimals for any numbers in the expression. Round to two decimal places as needed.)
c. Give a practical interpretation of the interval, part (b).
O A. One can be 95% confident that latex gloves cause allergies for all who use a number of gloves contained in the interval.
O B. One can be 95% confident that the…
An automobile dealer conducted a test to determine if the time in minutes needed to complete a minor engine tune-up depends on whether a computerized engine analyzer or an electronic analyzer is used. Because tune-up time varies among compact, intermediate,
and full-sized cars, the three types of cars were used as blocks in the experiment. The data obtained follow.
Analyzer
Computerized
Electronic
Compact
50
41
Car
Intermediate
56
44
Full-sized
62
47
Use a = 0.05 to test for any significant differences.
State the null and alternative hypotheses.
O Ho: Hcompact * HIntermediate * HFull-sized
Ha: "Compact = HIntermediate = 4Full-sized
O Ho: HComputerized * HElectronic
Ha: HComputerized = HElectronic
O Ho: HComputerized = HElectronic
Ha: "Computerized * HElectronic
O Ho: HComputerized = HElectronic = "Compact = HIntermediate = "Full-sized
H.: Not all the population means are equal.
O Ho: HCompact = HIntermediate = HFull-sized
Hai H compact * HIntermediate * HFull-sized
Find the value of…
Chapter 4 Solutions
Introduction To Statistics And Data Analysis
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