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206 randomly selected light bulbs were tested in a laboratory, 161 lasted more than 500 hours. Find a point estimate of the proportion of all light bulbs that last more than 500 hours.
Find the area under the normal distribution curve to the right of z = -1.03.
Assuming that a difference (Δ) of 2 lbs. in the mean was important to detect, a maximum Type I Error (α) level of 5%, and the desire to run a two-tailed test, then:
Find the t c for a 90% confidence level with a sample size of 18.
The student body of a large university comprises 60% female students. Elucidate what is the probability that the students in the sample exactly two are female?
Develop a trend line for the demand for fertilizer using computer software. Data collected on the yearly demand for 50 pound bags of fertilizer at Wallace Garden Supply are shown in the following table:
a) What type of research uses numeric measurement data? b) What type of research uses a research hypothesis? c) What type of research does not use statistical data analysis?
The supermarket is open 16 hours per day. What is the probability that the total number of customers who enter the supermarket in one day is greater than 10,000?
Using the business problem selected ( business, economic or marketing)develop a problem statement which can be addressed with survey research. Prepare a 10-13-question survey to collect primary data regarding your selected problem statement.
Find the 90% confidence interval for the variance and standard deviation for the time it takes a state police inspector to check a truck for safety if a sample of 27 trucks has a standard deviation of 6.8 minutes.
Based on the F distribution tables, what is the most accurate statement that can be made about the p-value for this test?
Agricultural researchers are studying three different ways of planting peanuts to determine whether significantly different levels of production yield will result.
Small bag of Skittles candies has following assortment: red (12), blue (5), orange (15), brown (0), green (16), and yellow (7). Create the probability distribution for x.
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