• Q : Set of null and alternative hypothesis....
    Basic Statistics :

    What could be a set of null and alternative hypothesis for this experiment? Find MSTR and MSE.

  • Q : Null and alternative hypotheses....
    Basic Statistics :

    Traditionally, the average price of homes sold in a medium size city in Canada was $220,000. A random sample of 81 homes sold this year showed an average price of $210,000 with a sample sta

  • Q : Analysis of variance avoid....
    Basic Statistics :

    When doing an experiment with many groups, what is the problem with doing t test between possible groups without an corrections? Why does use of the analysis of variance avoid that problem?

  • Q : Geometric distribution or poison distrubution....
    Basic Statistics :

    Find the indicated probabilities using the geometric distribution or poison distrubution. Then determine if the events are unusual, if convenient use the pioson probability table or technology to fi

  • Q : P-value for the interaction....
    Basic Statistics :

    If the p-value for the interaction term in a Two Factor ANOVA table is 0.057, what do you do? Interaction is significant, so the next step is looking at the main effects.

  • Q : Probability of dying for males....
    Basic Statistics :

    What is the probability that a 20 year old female will live through her 25th year? What is the probability of dying for males 21-26 years of age?

  • Q : Average weight less than 28 gram....
    Basic Statistics :

    The mean weight of Lay's mini size chips is 28.3 gram with a standard deviation of 1 gram, what's the probability to get a sample of 30 bags of this kind of chips with an average weight less than 28

  • Q : Pooled standard deviation in an anova table....
    Basic Statistics :

    How do you find the pooled standard deviation in an ANOVA table?

  • Q : Standard error of the mean....
    Basic Statistics :

    The mean time to prepare a return is 90 minutes and the standard deviation of the distribution is 14 minutes. Suppose 100 returns from this year are selected and analyzed regarding the preparation.

  • Q : What is the expected ratio....
    Basic Statistics :

    Use smallest whole number. Example if the ratio was 55,20,20,9 then the expexed ration would be 6:2:2:1 Use smallest whole number.

  • Q : Linear programming model....
    Basic Statistics :

    Develop the linear programming model and determine how many salespersons should be contracted and how should their off-days be allocated.

  • Q : Expected number of cars at the car wash....
    Basic Statistics :

    What is the expected number of cars at the car wash?

  • Q : Fixed number of objects....
    Basic Statistics :

    An experiment consists of choosing a subset from a fixed number of objects where the arrangement/order of the chosen objects is not important. Determine the size of the sample space when you choose

  • Q : What is the probability....
    Basic Statistics :

    A box contains 24 yellow, 32 green and 36 red jelly beans. If 15 jelly beans are selected at random, what is the probability that:

  • Q : Calculate the covariance between the returns....
    Basic Statistics :

    Given the returns and probabilities for the three possible states listed here, calculate the covariance between the returns of Stock A and Stock B. For convenience, assume that the expected returns

  • Q : Output of a process....
    Basic Statistics :

    Identify three situations where the measured output of a process has a small variation and three situations where the variation is larger (for instance, the time for a phone call to ring the other

  • Q : Two independent samples....
    Basic Statistics :

    Why, when dealing with two independent samples where you cannot assume the population variances are equal, should the degrees of freedom be adjusted?

  • Q : American cancer society-melanoma....
    Basic Statistics :

    According to the american cancer society, melanoma, a form of skin cancer, kills 15% of Americans who suffer from the disease each year. Consider a sample of 10,000 melanoma patients.

  • Q : Confidence intervals for the population variance....
    Basic Statistics :

    Use technology to construct the confidence intervals for the population variance ?^2 and the population standard deviation ?. Assume the sample is taken from a normally distributed population.

  • Q : Confidence intervals for the population variance....
    Basic Statistics :

    Use technology to construct the confidence intervals for the population variance ?^2 and the population standard deviation?. Assume the sample is taken from a normally distributed population.

  • Q : Number of defectives in a random sample....
    Basic Statistics :

    A company that produces DVD drives has a 9% defective rate. Let X represent the number of defectives in a random sample of 51 of their drives.

  • Q : Population proportion of males....
    Basic Statistics :

    With the given confidence, it can be said that the population proportion of males ages 18 - 64 who say they have gone to the dentist in the past year is betwen the endpoints of the given confidence

  • Q : Likelihood of this event....
    Basic Statistics :

    What is the likelihood of this event, assuming two-thirds (.6667) of the stockholders approve? (Round your intermediate and final answer to 4 decimal places.)?

  • Q : Draw a normal curve and label....
    Basic Statistics :

    Given n = 36, = 0.05, and = 3, Draw a normal curve and label "acceptance" and "rejection" regions. Find the value of x-bar that would cause us to reject the null hypothesis.

  • Q : Expected number of cars....
    Basic Statistics :

    Consider a small self-service car wash that has cars arriving with exponentially distributed inter arrival times at a mean rate of 15 per hour. The car wash has 3 washing bays, each equipped with a

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