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Find out the point of estimate of the population proportion, the margin of error for the following confidence interval, and the number of individuals in the sample with the specific characteristic,
Fixed costs are expected to increase 10% per year. Develop a spreadsheet model to calculate the net present value of profit over a 3-year period, assuming a 7% discount rate.
How many observation do you recommend for an experiment where an R-square of 50% is expected?
Assume a geyser has a mean time betwen eruptions of 96 minutes. Let interval of time between the erupitons be normally distributed with standard deviation 29 minutes.
In the certain assembly plant, four machines, A, B, C and D, make 20%, 18%, 32% and 30%, respectively, of the products. It is known from past experience that 2%, 5%, 4% and 1% of the products made b
A garage band wants to hold the concert. The expected crowd is 3,000. The average expenditure upon concessions is $15. Tickets sell for $10 each, and band's profit is 80% of the gate, along with con
A company is trying to predict long-run market share of new men's deodorant. Based upon initial marketing studies, they believe that 35% of new purchasers in market will ultimately try this brand.
You determine the raise in culture growth following exposure to three different levels (A-C) of growth factor. The entire standard deviation from all cultures you measure is 5.49519418136512. You de
Dr. Y has 184 students in his class. The scores on the midterm are normally distributed with the mean of 70 and a variance of 81. How many students in class can be expected to receive a score betwee
Determine some disadvantages of using non-parametric analysis (versus parametric)?
In the field study of this bird, a researcher attempted to determine the fraction of individuals of each sex in the population. She based her estimate on the number of individuals of each sex detect
When calculating the frequency distribution of a scenario where the minimum value is 14, the maximum value is 135, the class width is 16, and the number of classes is 8, the lower class limits are _
Classify the two events of "swimming all day at the beach" and "getting sunburn" as independent or dependent.
Determine the probability that a randomly chosen device will have a lifetime greater than two years? Assume a group of 5 friends each buy a new fitness device. Determine the probability that 4 or mor
How many hamburgers should the restaurant stock to be 99% sure of not running out on given day? Place you answer, rounded to the nearest whole number in the blank. For example, 345 would be a legiti
A single variable X can explain a large percentage of variation in some other variable Y when the two variables are?
Two students, John and Mary, are both registered for same course. If John attends 80 percent of time and Mary 60 percent (and their attendance patterns are totally independent), then if at least one
A researcher desires to estimate the mean serum cholestreol level for college age women. In a past study the standard deviation for this measure was 42 units.
You want to determine the percentage of statistics students who get grades of C or better. How many students should you survey to be 95% confident that the sample percentage is off by no more than 2
The Phillies were accused of cheating their beer customers by not putting enough beer in their 12 oz cups. When 15 cups were selected at random, they were found to have a mean of 11.7 ounces with a
Suggest an experiment where we ask what kind of car - either domestic (e.g., Chevrolet, Ford, Chrysler, etc.), foreign built abroad (e.g. a Toyota built in Japan) or foreign built in U.S. (e.g., a T
This group had mean score of 550 and population standard deviation of 140. Determine the 95% confidence interval for the population mean for the GRE test. Identify the point estimate for the mean an
In the gallop poll of 1000 adults, 930 said that restaurants and bars must refuse service to patrons who had too much to drink. Determine a 90% confience interval for true percentage of patrons with
A NAPA Auto Parts supplier desires information regarding how long car owners plan to keep their cars. A random sample of 41 car owners results in mean of 7 years with standard deviation of 3.75 year
Develop a decision table for this problem. Comprise all conditional values and probabilities in the table. What is your recommended course of action?(c) If John is capable to develop BC-6 with ingr