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In a pharmacological experiment, 35 lab rats were not given water for 11 hours and were then permitted access to water for 1 hour. The amounts of water consumed (mL/hour) are given in the following table.
10.6
13.3
15.5
10.7
9.6
12.1
11.8
10.9
9.9
13.2
9.3
11.7
13.0
12.3
11.0
13.1
12.5
13.9
14.1
14.8
15.1
12.8
14.0
7.1
12.7
9.0
13.6
12.6
Obtain a 98% con?dence interval for the mean amount of water consumed.
A random sample of size 15 taken from a normally distributed population revealed a sample mean of 75 and a sample variance of 25. The upper limit of a 95% confidence interval for the population mean would equal?
The probability will be .90 that the sample mean will not differ from the true mean by more than 20 percent of the std. deviation. How large a sample should he take?
suppose a random sample of 100 u.s. companies taken in 2005 showed that 21 offered high-deductible health insurance
Wwho are also athletes but who are not regularly hit in the head. Is this an example of an experimental or nonexperimental study?
Do you think a sample of 25 is large enough to give them the margin of error they want? If not, how large a sample do you suggest they take?
Find the critical value for different types of sample size and level of significance:
In a study, 37% of adults questioned reported that their health was excellent. A researcher wishes to study the health of people living close to a nuclear power plant.
In a regional spelling bee, the 8 finalists consist of 3 boys and 5 girls. Find the number of sample point the sample space S for the number of possible orders at the conclusion of the contest
ESPN reported in sample of 1000 homes the proportion of people who watched the Texas v. Ohio State college football game this weekend was .6.
radovilsky manufacturing company in hayward california makes flashing lights for toys. the company operates its
The amount of growth during a set 15-day period for a population of sunflower plants follows a normal distribution with μ=3.07 cm and σ=0.40 cm.
if a manager believes that the required sample size is too large for a situation in which she desires to estimate the
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