• Q : Boxes of smackin good cereal....
    Basic Statistics :

    If you randomly chosen 9 boxes of Smackin good cereal, which probability that their MEAN weight is less than 19.5 ounces?

  • Q : Confident interval for population mean....
    Basic Statistics :

    The waiting times in minutes were: 10, 12, 20, 15, 17, 10, 30, 28, 35, 28, 19, 27, 25, 22, 33, 37, 14, 21, 20, and 23. Suppose ? = 8.94. Find out the 95% confident interval for population mean.

  • Q : Number of times heads comes up....
    Basic Statistics :

    Let X be number of times heads comes up when a fair coin is tossed 30 times. Which one of the following statements is false?

  • Q : Find the p-value for the indicated hypothesis test....
    Basic Statistics :

    A random sample of 140 forty-year-old men contains 25% smokers. Find the P-value for a hypothesis test to determine whether the percentage of forty-year-old men that smoke differs from 22%.

  • Q : Sample size required to assure....
    Basic Statistics :

    Find out the sample size required to assure with 95 percent confidence that the sample mean will not differ from population mean by more than 2 units.

  • Q : Bmi for winners....
    Basic Statistics :

    Listed below are body mass indexes (BMI) for current Miss America winners. Employ a 0.01 significance level to test the claim that recent Miss America winners are from population with mean BMI less

  • Q : Confidence interval for population standard deviation....
    Basic Statistics :

    Suppose that distribution of average college graduates is a bell shaped curve. A random sample of 13 students has the mean salary of $35,000 and standard deviation of $5,000. Make a 95% confidence i

  • Q : Probability of giving birth....
    Basic Statistics :

    Suppose that the probability of giving birth to a baby boy is 0.5. Find out the probability of giving birth to at least 180 boys when survey was conducted on 300 pregnant women. Draw appropriate gra

  • Q : Criteria for binomial probability distribution....
    Basic Statistics :

    Show that the above situation satisfied all four criteria for binomial probability distribution. Find out the probability that more than two patients or less or equal to 5 patients are cured.

  • Q : Two kinds of bonds available....
    Basic Statistics :

    Suppose that you're ivesting $10,000 in one bond. There are two kinds of bonds available. The first bond provide you a 7% return rate with a default rate of 3% and second bond gives you return of 9%

  • Q : Best estimate of the count rate....
    Basic Statistics :

    Then the sample is removed, the counter is reset, and background is measured to be 3442 events in 20 minutes. Determine the best estimate of the count rate due to the sample only? What is your uncer

  • Q : Reduce the uncertainty....
    Basic Statistics :

    A quantity x is carefully measured 25 times and the best value is determined to be xbest = 11.0 ± 2.0. How many total measurements would be needed to reduce the uncertainty to less than &plus

  • Q : Comulative distribution function....
    Basic Statistics :

    As you know that the CDF (comulative distribution function) is continuous from the right.

  • Q : Probability that the people who bought apples....
    Basic Statistics :

    Twelve people go to the store. Eight people buy apples, six students buy oranges, and two students buy nothing at all. What is the probability that the people who bought apples also bought oranges?

  • Q : Results of analysis summarized....
    Basic Statistics :

    A real estate developer is considering investing in the shopping mall on outskirts of Atlanta, Georgia. Five parcels of land are being evaluated. Of specific importance is the income in area surroun

  • Q : Comparison distribution mean and variance....
    Basic Statistics :

    For a particular known population, the mean is 100 and the variance is 25. A researcher conducts a study in which 10 participants are exposed to an experimental procedure. To test the hypothesis tha

  • Q : Distribution mean and variance....
    Basic Statistics :

    For a particular known population, the mean is 100 and the variance is 25. A researcher conducts a study in which 10 participants are exposed to an experimental procedure. To test the hypothesis tha

  • Q : Dividing the variance of the population....
    Basic Statistics :

    Dividing the variance of the population of individuals by the number of individuals in each sample gives:

  • Q : Tobacco industry closely monitors....
    Basic Statistics :

    The tobacco industry closely monitors all surveys which involve smoking. One survey showed that among 785 randomly chosen subjects who completed four years of college, 18.3% smoke.

  • Q : Power of hypothesis test....
    Basic Statistics :

    Discuss how the power of hypothesis test is affected by each of the following. Suppose that all other factors are held constant.

  • Q : Determine the null hypothesis....
    Basic Statistics :

    Determine the null hypothesis.? The rate of learning for the sample of rats tested with colorful wallpaper is no different than population of rats tested under ordinary circumstances

  • Q : Monitoring devices and techniques....
    Basic Statistics :

    Biofeedback monitoring devices and techniques in the control of physiologic functions help astronauts control stress. One experiment related to this topic is discussed by G. Rotondo, et al., Acta A

  • Q : Dividing the variance of population....
    Basic Statistics :

    Dividing the variance of population of individuals by number of individuals in each and every sample gives:

  • Q : Specific known population....
    Basic Statistics :

    For a specific known population, the mean is 100 and variance is 25. A researcher conducts a study in which 10 participants are exposed to experimental procedure. To test the hypothesis that populat

  • Q : True difference between proportions voicing objection....
    Basic Statistics :

    Determine the true difference between the proportions voicing objection to new policy for the two companies, with the confidence coefficient 0.98.

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