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A botanist has developed a new hybrid cotton plant that can withstand insects better than other cotton plants. However, there is some concern about the germination of seeds from the new plant. To estimate the probability that a seed from the new plant will germinate, a random sample of 3000 seeds was planted in warm, moist soil. Of these seeds, 2510 germinated.
(a) Use relative frequencies to estimate the probability that a seed will germinate. What is your estimate? (Round your answer to 3 decimal places.)
(b) Use relative frequencies to estimate the probability that a seed will not germinate. What is your estimate? Use relative frequencies to estimate the probability that a seed will not germinate. What is your estimate?
An EMT Service keeps records of emergency calls. A study of 150 five-minute time intervals resulted in the distribution of number of calls as follows.
A grab bag contains 10 $1 prizes, 7 $5 prizes, and 3 $20 prizes. three are chosen at random. find the probability that exactly two $20 prizes are chosen?
What are various non-parametric tests utilized in business decision making? Give an example of each test with an appropriate business situation.
During the period of time phone-in reservations are being taken at a local university, calls come in at a rate of one every ten minutes.
The distribution is normal. The mean numbers of trials to learn maze for the group with the colrful wallpaper is 11. What is the standard deviation of the distribution of means?
It is suspected that the mean turnover has changed and is not 6.0. Use the .05 significance level.
Which of the variables below do you think will be roughly normally distributed? Please select all that apply.
What percent of sales representatives earn more than $42,000 per year?
The population of car speeds is approximately normally distributed. Determine a 90% confidence interval estimate for the speed of all cars.
Give an understanding with the difference between a population, a sample, and a sampling distribution. Uus a Java applet and external web sites for comment/reference.
Determine the following:Mean, Median and Variance.
Determine the p-value, and at 95% confidence, test the hypotheses.
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