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At a party there are 37 students over age 21 and 22 students under age 21. You choose at random 3 of those over 21 and separately choose at random 2 of those under 21 to interview about attitudes toward alcohol. You have given every student at the party the same chance to be interviewed.
What is the chance? students over age 21 students under age 21 Why is your sample not an SRS? These combinations of students have equal chances of being interviewed. Not all combinations of students have an equal chance of being interviewed. All combinations of students have an equal chance of being interviewed. The sample size is too small.
To evaluate the effect of a treatment , a sample of n=9 is obtained from a population with a mean of m=40 and the treatment is administered to the individuals is found to be M-33
You manufacture and sell an iron rod whose electrical conductivity is supposed to be 10.1. You plan to make 6 measurements of the conductivity of a rod you plan to sell.
Collect on its accounts receivable is 36 with a standard deviation of 11 days. What is the probability that a single AR account takes more than 30 days to collect?
Births. Randomly selected births records were obtained and results are listed in the table below (based on data from the National Vital statistics Report,
The Federal Government is stepping up efforts to reduce average response times of fire departments to fire calls. The distribution of mean response times to fire calls follows a normal distribution with a mean of 12.8 minutes and a standard deviat..
Develop three regression models to predict the selling price based upon each of the other factors individually. Which of these is best?
Determine the z values for 29 and 34 hours. What percent of the garages take between 32 hours and 34 hours to erect?
State the hypotheses for a right-tailed test. Obtain a test statistic and p-value assuming equal variances. Interpret these results. Is the difference in mean scores large enough to be important?
Frequently, tests that yield abnormal results are repeated for confirmation. What is the probability that for a normal person a test will be at least 1.5 times as high as the upper limit of normal on two separate occasions?
Twelve doctor's offices were given 3 lab inspections with the following results:
What is the probability that the first two cards dealt yields "Black Jack"?
Test claim that mean responses are same for all populations of patients receiving either treatment and of either gender.
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