• Q : Standard deviation of the time....
    Basic Statistics :

    What is the mean time until a packet is formed, that is, until five messages arrived at the node? What is the standard deviation of the time until a packet is formed?

  • Q : Estimating the probability....
    Basic Statistics :

    Assume that a women's heights are normally distributed with a mean given by u= 63.2, and a standard deviation given by a=3.1 in. If 1 woman is randomly selected, find the probability that her height i

  • Q : Standard procedure for defining-measuring central tenedncy....
    Basic Statistics :

    Explain why it is necessary to have more than one standard procedure for defining and measuring central tenedncy, and why cant we just have a singe measure of central tendency to use with all datase

  • Q : Estimate of the common population standard deviation....
    Basic Statistics :

    From the given data what is the accumulated estimate of the common population standard deviation? (Assume that A and B have the same variance and the samples are independently gathered from two norm

  • Q : Binomial distribution with a trial....
    Basic Statistics :

    Assume that a procedure yields a binomial distribution with a trial repeated n times. use the binomial probability formula to find the probability of x successes table to find the probability of x s

  • Q : Determine the probability that the sample will indicate....
    Basic Statistics :

    Determine the probability that the sample will indicate an adjustment is not needed.c) Assuming that 10 pounds is the mean weight, what should the cutoff be if the company wants no more than a 5% c

  • Q : Underlying proportion of girls....
    Basic Statistics :

    What is the upper confidence limit of an approximate 95% confidence interval for the difference between the underlying proportion of boys who said that they had ever drunk beer and the underlying pr

  • Q : Smallest interval about the mean....
    Basic Statistics :

    The mean score of the first calculus exam was 81%. The standard deviation was 12%. Find the smallest interval about the mean that contains at least 71% of the scores. Could you please explain all th

  • Q : Value of a statistic from sample....
    Basic Statistics :

    The variability in the value of a statistic from sample to sample is known as? Characteristics of a sample are known as?

  • Q : Sample space for this experiment....
    Basic Statistics :

    a) Write down the sample space for this experiment. b) Find the probabilities of the above mentioned events.

  • Q : Variability in the volume due to settling....
    Basic Statistics :

    Cereal is sold by weight not volume. This introduces variability in the volume due to settling. As such, the height to which a cereal box is filled is random.

  • Q : Picture of a cherry at the bottom of the cap....
    Basic Statistics :

    A soda company wants to stimulate sales in this economic climate by giving customers a chance to win a small prize for every bottle of soda they buy. There is a 15% chance that a customer will find

  • Q : Median life span of certain species....
    Basic Statistics :

    To determine the median life span of certain species of animal is greater than 7 years a random sample of 22 observations were made and life span in years is the following:

  • Q : Probability of having a republican majority....
    Basic Statistics :

    What is the probability of having a Republican majority? If this special group of Republicans and Democrats contains 10 women and 5 men, what is the probability of forming this five member committee

  • Q : Smallest interval about the mean....
    Basic Statistics :

    The mean score of the first calculus exam was 81%. The standard deviation was 12%. Find the smallest interval about the mean that contains at least 71% of the scores.

  • Q : Sample space for experiment....
    Basic Statistics :

    Suppose we watch the price of the Dow Jones Industrial Index for three days. Write down the sample space for this experiment.

  • Q : Type of cereal and box....
    Basic Statistics :

    If the heights for a certain type of cereal and box have a normal(12,0.5) distribution in units of inches, what is the chance that a randomly chosen cereal box has a height of 10.7 inches or less?

  • Q : Probability distribution of z....
    Basic Statistics :

    If we roll a pair of fair 6 sided die, let Z denote the max (largest) of the outcomes on the two dice. Construct the probability distribution of Z and compute its expected value.

  • Q : Probability that a randomly chosen foot....
    Basic Statistics :

    For this population find the probability that a randomly chosen foot is less than 26 centimeters long? What is the 95th Percentile?

  • Q : Sample of size....
    Basic Statistics :

    A real number X is drawn at random from the interval (0,1). A rectangle is formed with sides X and (1-X). Denote the area by Y = X*(1-X).  

  • Q : Probability of baseball player....
    Basic Statistics :

    Suppose that, on average, a baseball player gets a hit once every three times she bats. What is the probability that she gets four hits in four at bats?

  • Q : Critical value for rejecting the null hypothesis....
    Basic Statistics :

    If p = .05, the critical value for rejecting the null hypothesis is

  • Q : Mean anxiety level of the students....
    Basic Statistics :

    The research hypothesis for this question is that the mean anxiety level of the students who participate in the workshops will be _____ those who do not.

  • Q : Prior probability of the bid....
    Basic Statistics :

    What is the prior probability of the bid being successful (that is, prior to the request for additional information)? What is the conditional probability of a request for additional information given

  • Q : Standard deviation of the distribution of means....
    Basic Statistics :

    A psychologist is conducting a study in which 30 students attend workshops by the speaking center for one hour per week over six weeks to reduce anxiety about public speaking. It is known that anx

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