__________I. According to the Empirical rule, 68.26% of the data (within one standard deviation of the mean) would fall between what two values for a population with mean of 816 and standard deviation of 248?
___________II. The mean age of all students at a university is 24 years. The mean age of a random sample of 100 students selected from this university if 23.6 years. The statistical conclusion can be __________?
____________III. The population mean and standard deviation cannot be determined for ___?__ data.
A) Qualitative B) discrete quantitative C) binomial D) continuous quantitative
I. 6826% lies in the interval 816 248
= 568 and 1064
II. C. The number in the sample must be increased
III. A. Qualitative
Qualitative data is not numerical. Mean and standard deviation cannot be determined for such data.
__________I. According to the Empirical rule, 68.26% of the data (within one standard deviation of the...
A sample of 31 students in normally distributed with a mean age of 22.6 years and a standard deviation of 1.6 years. Construct a 95% confidence interval for the population standard deviation of student ages. Round the boundaries to two decimal places.
7. At a large university, the mean age of students is 22.3 years, and standard deviation is 4 years. Random samples of 64 students are drawn. (a) What type of distribution is the sampling distribution of mean and why? (b) What is the probability that the average age of these 64 students is greater than 23 years? (c) What is the probability that the total age of a class of 24 students will be less than 540? (5 points)
Question 14 8 pts A laboratory tested a sample of 100 chicken eggs and found that the mean amount of cholesterol was 257 milligrams; the population standard deviation for all eggs is 15.2 milligrams. Use this data to construct a 95 percent confidence interval for the true mean cholesterol content of all such eges. (249.02. 264.98) (254.02.259.98 (251.02, 262.98) (255.02. 261.98) Question 15 8 pts A group of 19 randomly selected students from a state university has a mean age...
The ages of a group of 121 randomly selected adult females have a standard deviation of 10 years Assume that the age of fomate statistics students have less wanation than ages of females in the general population, so leta 10.9 years for the sample size calculation How many female stics student ages must be obtained in order to estimate the mean age of a female sialistics Students Assume that we want 90% confidence that the sample mean is within one-half...
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