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To determine the possible effect of a chemical treatment on the rate of seed germination, 300 chemically treated seeds and 250 untreated seeds were sown. It was found that 267 of the chemically treated seeds and 205 of the untreated seeds germinated. Let P1 be the proportion of the population of all chemically treated seeds that germinate, and let P2 be the proportion of the population of all untreated seeds that germinate. Find a 90% confidence interval for P1-P2. Then complete the table below.
1. What is the lower limit of the 90% confidence interval?
2. What is the upper level of the 90% confidence interval?
Each scenario involves randomly selecting n i observations from four, independent, Normal populations as described.
Wheel-Rite has agreed to ship the maximum number of wheel bearings that it produces each day to Itex when an order has been received.
Give an example representing a discrete probability distribution and a continuous probability distribution. Explain why your choice is discrete and continuous.
At.01 significance level is it sensible to conclude that modification decreased the number of traffic accidents?
At a = 0.05, what is the test value?
Determine the probability that between 5 and 10 minutes will pass between successive occurrences.
The company statistician has reported the mean number of man-hours lost per month but did not keep a record of the total sum. Should the manager order the study repeated to obtain the desired information? Explain your answer clearly.
What is meant by the probability of an event? Discuss how addition and multiplication techniques are used to solve probability problems.
Three unrelated people go for dinner to a Chinese restaurant which uses MSG in its food. Each person has a 10% probability of developing an adverse reaction to the MSG.
Using the empirical rule what percentage of adults is 25 - 45 has iq score bet 70 and 130.
The January 17, 1994 issue of Time magazine reported that 58% of adult Americans said yes to the question "If you or your spouse were pregnant, would you want the unborn child tested for genetic defects?"
A vertical line is drawn through a normal distribution at z = -0.25, and separates the distribution into two sections. What proportion of the distribution is in the larger section?
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