When two births are randomly selected, the sample space for genders is bb, bg, gb, and gg. Assume that those four outcomes are equally likely. Construct a table that describes the sampling distribution of the sample proportion of girls from two births. Does the mean of the sample proportions equal the proportion of girls in two births? Does the result suggest that a sample proportion is an unbiased estimator of a 1 population proportion? For the entire population, assume the probability of having a boy is the probability of having a girl is and this is not affected by how many boys or girls have previously been born. 2

Part I A bakery sells homemade bread by the loaf and sales are uniformly distributed between 200 and 600 loaves per day. a. Find the probability of selling 240 loaves on a given day. b. Find the probability of selling between 250 and 260 loaves per day Part II The golf balls produced by TruGolf have a mean distance of 250 meters and a variance of 625 meters. c. How large a sample of TruGolf balls should be taken if they want to estimate with 90% confidence the mean distance to within 8 meters? d A random sample of 40 balls from TruGolf are selected. Find the Bound of Error when the confidence level is 95% for TruGolf

A district health officer wishes to determine if the six villages in his district are independent of residents contracting malaria, schistosomiasis, cholera or tuberculosis. Identity an appropriate statistical test and the tail of the test for the problem. Assume all samples used for study come from a normal population.

We would like to create a confidence interval for the mean. Which of the following would produce the smallest margin of error? Select one: a.A 95% confidence level and a sample size of 150 subjects b. A 99% confidence level and a sample size of 600 subjects. c. A 99% confidence level and a sample size of 150 subjects. d.A 95% confidence level and a sample size of 600 subjects.

Using a pooled sample estimator, o , assumes the two populations have O A. different means. O B. the same mean. O C. the same variance. O D. different variances.

Consider a 100-point college exam for which there is a large number of students that perform extremely well, as well as a large number of students that perform extremely poorly. Which statement below is true? O The distribution of scores is probably symmetrical. O The distribution of scores probably has a mean close to 75. O The distribution of scores is probably bimodal. O The distribution of scores probably has a median close to 75,

What the variance for the following Sample of n - 3 scores? Scores: 1, 4, 7 06 15 3.

An analysis of variance produces SSbetween = 75 and MSbetween = 15. In this analysis, how many treatment conditions are being compared?​ Select one: a. ​ 3 b. ​ 4 c. ​ 5 d. ​ 6

In a simple random sample of 1200 young​ people, 86​% had earned a high school diploma. What is the standard error for this estimate of the percentage of all young people who earned a high school​ diploma?

Consider the following two sets of history class final test scores: X: 88, 15, 22, 93, 72 Y: 50, 52, 59, 61, 56 A. Which of these sets of scores was more likely drawn from a sample with the greater Variance? B. Why?