Mathematics, 19.12.2019 06:31 jalst6084
The number of hours spent studying by students on alarge campus in the week before final exams followsa normal distribution with a standard deviation of8.4 hours. a random sample of these students is takento estimate the population mean number of hoursstudying. a. how large a sample is needed to ensure that theprobability that the sample mean differs from thepopulation mean by more than 2.0 hours is lessthan 0.05? b. without doing the calculations, state whether alarger or smaller sample size compared to the sam-ple size in part (a) would be required to guaranteethat the probability of the sample mean differingfrom the population mean by more than 2.0 hoursis less than 0.10.c. without doing the calculations, state whether alarger or smaller sample size compared to the sam-ple size in part (a) would be required to guaranteethat the probability of the sample mean differingfrom the population mean by more than 1.5 hours isless than 0.05.
Answers: 3
Mathematics, 21.06.2019 20:20
Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?
Answers: 1
Mathematics, 21.06.2019 23:00
Hormones perform important functions within the reproductive system. during puberty, a number of changes occur in the body. which hormone is responsible for the development of these characteristics in the female? estrogen progestin progesterone testosterone
Answers: 1
Mathematics, 22.06.2019 01:30
Use the given degree of confidence and sample data to construct a confidence interval for the population mean mu . assume that the population has a normal distribution. a laboratory tested twelve chicken eggs and found that the mean amount of cholesterol was 185 milligrams with sequals 17.6 milligrams. a confidence interval of 173.8 mgless than muless than 196.2 mg is constructed for the true mean cholesterol content of all such eggs. it was assumed that the population has a normal distribution. what confidence level does this interval represent?
Answers: 1
The number of hours spent studying by students on alarge campus in the week before final exams follo...
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