Ages of Gamblers The mean age of a sample of 22 people who were playing the slot machines is 49.3 years, and the standard deviation is 6.8 years. The mean age of a sample of 31 people who were playing roulette is 54.3 with a standard deviation of 3.2 years. Can it be concluded at a = 0.05 that the mean age of those playing the slot machines is less than those playing roulette? Use u, for the mean age of those playing slot machines. Assume the variables are normally distributed and the variances are unequal. Part: 0 / 5 Part 1 of 5 State the hypotheses and identify the claim with the correct hypothesis. Ho : (Choose one) ▼ H : (Choose one) ▼ This hypothesis test is a (Choose one) ▼ test.

On a 5 question multiple choice test there are five possible answers, of which one is correct. Find the mean of the number of questions students guess correctly. Find the standard error of the number of questions guess correctly.

What are the two types of incorrect decisions?

A school superintendent wanted to know whether there were differences between the high schools in her district with regards to the proportion of students who do not live with their biological parents.   She surveyed 200 students from each of the two high schools – East and West.   The proportion of students from the survey at East who do not live with their biological parents is 3.4%. The proportion of students from the survey at East who do not live with their biological parents is 4.2%. Using a 95% confidence interval (2SD or Theory based), can the superintendent conclude that there is a difference between East and West with respect to the proportion of students who do not live with their biological parents. Group of answer choices Yes she can conclude there is a difference because the confidence intervals overlap. No she cannot conclude there is a difference because the confidence intervals overlap. Yes she can conclude there is a difference because the confidence intervals don’t…