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A study was conducted to see if the herbal supplement helped to descrese weight. After 12 weeks, 42 subjects using the herbal supplement and high-fiber, low-calorie diet had mean weight loss of 3.2
Provide the kind of distribution pattern that occurs when the majority of the data values fall to the left.
At 0.05 , test the claim that the mean weight loss for the group using the herbal supplement is greater than the mean weight loss for the group using the placebo.
If a baseball player's batting is 0.340, determine the probability that the player will have a bad season and get at most 60 hits in 200 times at bat.
A random sample of 26 batches of peanuts reveals on average level of 53 units of mold with variance is 23 squared units. Test null hypothesis which the actual variance 37 squared units, against the
Let x be the random variable which represents length of time it takes a student to write down a term paper for Eric stats class. After interviewing many students, it was found that x has an approxim
Let B and C be independent random variables, uniformly distributed over [0,10] and [0,9] respectively. Determine the probability that both roots of the equation X^2 + BX +C = 0 are real?
What is the probability that there are exactly 3 girls among the first 9 and exactly 8 girls among the first 21 babies born in a certain hospital in a given week?
At a = .05, test the claim that the mean weight loss for group using the herbal supplement is greater than the mean weight loss for group using the placebo.
A travel association says that daily lodging cost for a family traveling in California is the same as in Florida. The daily lodging cost for 35 families traveling in California is $136 and the stand
What do you conclude regarding there being relationship between # of full time employees and # of credit unions. Discuss as you would to someone who does not know statistics
From 9 names on a ballot, a committee of 4, will be elected to attend a political national convention. How many different committees are possible?
Employ an 80% confidence interval to test the null hypothesis that the mean start up cost is 118. Justify your answer.
If the null hypothesis is that mean=3218, the alternative hypothesis is that the mean>3218, and sample mean is x=3342, the sample standard deviation is s=287, the sample size is n=42, and alpha=0
What do you mean by the least-squares criterion? Provide a very general description of how the least-squares criterion is involved in the construction of the least-squares line. Why do we say the le
A company is interested in determining the costs of lunch in their cafeteria. After surveying employees, the staff calculated that a 95% confidence interval for the mean amount of money spent for lu
Does the sample recommend that the proportion of first home buyers with income less than $40,000 is more than 15%? Comment and write down your own conclusions based upon an appropriate confidence in
The recapitalization proposal is to issue $15,000,000 worth of long-term debt, at an interest rate of 6.0 percent, and use the proceeds to repurchase 250,000 shares of common stock worth $15,000,000
Take any location (n, k) in Pascal's Triangle, and consider the six locations immediately surrounding (n,k). Label these locations alternately clockwise A and B.
Assume there is unlimited supply of M&M's and of bubblegum, which cost one cent each, and of sourballs, peppermints, and gumdrops, which cost two cents each. You're going to buy n cents' worth o
A sample golfer showed that their average score on specific golf course was 94 with standard d of 6. Determine the 95% confidence interval of mean score for all 40 golfers?
By measuring the amount of time it takes component of product to move from upon workstation to the next, an engineer has estimated that the standard d is 5.1 seconds.
A random sample of 88 light bulbs had a mean life x = 497 hrs. Assume the Standard d = 27 hrs. Construct a 90% confidence interval for the mean life, u, of all light bulbs of this type.
The measurement of length of the index finger of a human right hand is normally distributed variable with a mean of 5.5cm and a standard d of 0.8cm. What is the probability that the finger length of
Suppose that the average annual salary for worker in the US is 31,000 and that annual salaries for Americans are normally distributed with standard d equal to 7,000. Find the following: