A sprint duathlon consists of a 5 km run, a 20 km bike ride, followed by another 5 km run. The meanfinish time of all participants in a recent large duathlon was 1.67 hours with a standard deviation of 0.25hours. Suppose a random sample of 30 participants was taken and the mean finishing time was found tobe 1.59 hours with a standard deviation of 0.30 hours. In this example, the numerical values of 1.67hours and 0.25 hours areA) estimates B) unbiased estimators C) parameters D) statistic

un times at a local marathon are known to follow a left-skewed distribution with a mean of 256 minutes and a standard deviation of 100 minutes. If we select a random sample of 46 people, what is the probability that the average run time of this sample will be between 231 minutes and 264 minutes?Give your answer to four decimal places. If the question cannot be answered with the information given, enter -1 as your answer.

Suppose the time to complete a 200-meter backstroke swim for female competitive swimmers is normally distributed with a mean μ = 141 seconds and a standard deviation σ = 7 seconds.Suppose the fastest 6% of female swimmers in the nation are offered college scholarships. In order to be given a scholarship, a swimmer must complete the 200-meter backstroke in no more than how many seconds? Give your answer in whole numbers.

When Nevaeh runs the 400 meter dash, her finishing times are normally distributed with a mean of 65 seconds and a standard deviation of 1.5 seconds. Using the empirical rule, determine the interval of times that represents the middle 68% of her finishing times in the 400 meter race.

Select the correct answer from each drop-down menu.Jacob surveyed members of three different gyms and recorded the number of hours they exercised last week. The mean and standard deviation (SD), of the data he gathered, is shown in the table.Gym A Gym B Gym CMean = 7SD = 2.9 Mean = 8SD = 4.2 Mean = 6SD = 3.2Use the information in the table to complete the following statement.The members of gym show the most consistency in the number of hours they exercised last week, because the of this data set is the .

Below is the standard deviation for extreme 10k finish times for a randomly selected group of women and men. Choose the statement that best summarizes the meaning of the standard deviation. Women: s0.16 Men: s = 0.25 OA. The distribution of men's finish times is less varied than the distribution of women's finish times. OB. On average, men's finish times will be 0.25 hours faster than the overall average finish time OC. On average, women's finish times will be 0.16 hours less than men's finish times. OD. The distribution of women's finish times is less varied than the distribution of men's finish times.