at a party there are 25 students over age 21 and 15 students under age 21...

at a party there are 25 students over age 21 and 15 students under age 21 you choose a random five over those 21 and separately choose a random three of those under 21 to interview about attitudes towards alcohol. You've given every student at the party the same chance to be interviewed what is that chance. why is your sample not an SRS?

Expert Solution

orchestra answered 2 years ago

Divide the data into three groups according to age: under 25, 26 to 49, and over...

Divide the data into three groups according to age: under 25, 26 to 49, and over 50. Use ANOVA to test the claim that all three of these groups have the same mean balance on their Visa card. Be sure to write down the mean and standard deviation for each group! Age <25 26-49 over 50 n = n = n = x = x...

Find the LCM Of 25/7, 15/28, 20/21.

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At age 21 Julio begins saving $750 each year until age 35 (15 payments) in an...

At age 21 Julio begins saving $750 each year until age 35 (15 payments) in an ordinary annuity paying 6.5% annual interest compounded yearly and then leaves his money in the account until age 65 (30 years). His friend Max begins at age 41 saving $1,500 per year in the same type of account until age 65 (25 payments). How much does each have in his account at age 65?

1. The mean age of College students is 25. A certain class of 33 students has...

1. The mean age of College students is 25. A certain class of 33 students has a mean age of 22.64 years. Assuming a population standard deviation of 2.87 years, at the 5% significance level, do the data provide sufficient evidence to conclude that the mean age of students in this class is less than the College mean? a. Set up the hypotheses for the one-mean ?-test. ?0: ??: b. Compute the test statistic. Round to two decimal places. c....

in a certain college, 25% of the students failed mathematics,15% of the students failed chemistry and...

in a certain college, 25% of the students failed mathematics,15% of the students failed chemistry and 10% of the students failed both mathematics and chemistry. A student is selected at random, I)if he failed the exam, what is the probability that he failed mathematics? ii) if he failed mathematics, what is the probability that he failed chemistry? iii) what is the probability that he failed mathematics or chemistry?

1) explain the relationship between the share of workers under the age of 25 and the...

1) explain the relationship between the share of workers under the age of 25 and the rise in involuntary unemployment. 2) why does it matter whether involuntary part time employment is caused by the business cycle or by structural influences?

Medicaid’s comprehensive and preventive child health program for individuals under the age of 21. The EPSDT...

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In a sample of 400 Americans over age 21, 75% said that they drank alcoholic beverages....

In a sample of 400 Americans over age 21, 75% said that they drank alcoholic beverages. What is 98% confidence interval of the true proportion of all Americans who drink alcoholic beverages?

Ten sampled students of 18-21 years of age received special training. They are given an IQ...

Ten sampled students of 18-21 years of age received special training. They are given an IQ test that is N (100, 102) in the general population. Let μ be the mean IQ of these students who received special training. The observed IQ scores: 121, 98, 95, 94,102, 106, 112, 120, 108, 109. Test if the special training improves the IQ score using significance level α = 0.05. a.What is the rejection region? b.Calculate the p-value and state your conclusion. c.What...

In the survey of 1500 students for the united states age 18 and under, 1043 were...

In the survey of 1500 students for the united states age 18 and under, 1043 were concerned about how they would pay for college. a) Find the mean and standard deviation of those concerned about financing college. b) Construct a 90% confidence interval for the population proportions. Interpret your results. c) Find the minimum sample size needed to estimate the population proportion at the 99% confidence level in order to ensure that the estimate is accurate within 4% of the...

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