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The number of pedestrians crossing a street in Downtown Providence during morning rush hours is assumed to follow a normal distribution with mean 290 and standard deviation 50.
What is the probability of more than 250 pedestrians crossing the street?
A sample of 81 business managers on the West Coast had an average breakfast cost of $7.65. 13. At a = 0.05, what is the test value?
Arrows. An Olympic archer is able to hit the bull s-eye 80% of the time. Assume each shot is independent of the others.
A large industrial firm uses 3 local motels to provide overnight accommodations for its clients. From past experience it is known that 20% of the clients are assigned rooms at the Ramada Inn, 50% at the Sheraton, and 30% at the Holiday Inn.
Before starting the trial, a pilot study is conducted involving 7 participants. Is there a statistically significant difference in blood pressures overtime? Run the test at a 5% level of significance.
Starting one month from? now, you need to withdraw ?$170 per month from your bank account to help cover the costs of your university education.
medical treatment will cure about 87 of all people who suffer from a certain eye disorder. suppose a large medical
High IQ scores. Scores on the Wechsler Adult Intelligence Scale for the 20 to 34 age group are approximately Normally distributed with mean 110 and standard.
historically eastern has never sold fewer than 2300 programs or more than 2700 programs at one game. each program costs
A human society claims that less than 36% of US. households own a dog. In random sample of 397 U. S. households, 151 say they own a dog. At mean=0.03, is there enough evidence to support the society's claim?
one hundred items are simultaneously put on a life test. suppose the life-times of the individual items are independent
State the null and alternative hypotheses and explain how you develop these two (2) hypotheses.
If you do a quantitative study (SCHOOL ADVISORY PROGRAM) for your dissertation, you must estimate the sample size you will need in order to have a reasonable chance of finding a relationship among the variables stated in your research hypotheses (..
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