Suppose an 8 sided die is tossed 300 times. Suppose that it is estimated that the probability of tossing a 6 is 0.21. Use this information to answer the following questions. a) What is the mean of the sampling distribution of the proportion of samples of size 300 tosses of this die? b) What is the standard deviation of the sampling distribution of the proportion of sixes samples of size

The lengths of adult males' hands are normally distributed with mean 190 mm and standard deviation is 7.4 mm. Suppose that 44 individuals are randomly chosen. Round all answers to 4 where possible. a. What is the distribution of ? I - N( b. For the group of 44, find the probability that the average hand length is more than 189. c. Find the first quartile for the average adult male hand length for this sample size. d. For part b), is the assumption that the distribution is normal necessary? No Yes Submit Ouortion

A sampling distribution (dotplot) for the mean quiz score for a sample n = 30 of STAT101 students is shown below. It was constructed using random samples from population data.  What does one dot in this dotplot represent?

The scores of individual students on the American College Testing (ABC) program composite college entrance examination have a normal distribution with a mean 18.6and a standard deviation 6.0.  At Northside high, 36 seniors take the test.   Assume that the scores at this school have the same distribution as national scores. A) What is the sampling distribution of the sample mean score of randomly selected 36 students?(show work) B) what is the distribution of a randomly selected one student?(show work)

Brads's hummingbird (Selasphorus sasin) has been studied by zoologist Bill Alther.† Suppose a small group of 15 Brad's hummingbirds has been under study in Arizona. The average weight for these birds is x = 3.15 grams. Based on previous studies, we can assume that the weights of Brads's hummingbirds have a normal distribution, with ? = 0.22 gram.   a) Find the sample size necessary for an 80% confidence level with a maximal margin of error E = 0.12 for the mean weights of the hummingbirds. (Round up to the nearest whole number.)   b) Find an 80% confidence interval for the average weights of Allen's hummingbirds in the study region. What is the margin of error? (Round your answers to two decimal places.)lower limit =upper limit =margin of error =

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