On the island of Lilliput, a sample random sample of 500 people reveals that 450 of...
On the island of Lilliput, a sample random sample of 500 people reveals that 450 of them prefer to open their egg on the small end. On the island of Blefuscu, a sample random sample of 250 people reveals that 210 of them prefer to open their egg on the small end.
Part Three: Assuming that Lilliputians and Blefuscuans are equally likely to open their egg on the small end, what is the probability of selecting samples of these two sizes with sample proportions as different as ours were (two-sided p-value, to four decimal places)
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On the island of Lilliput, a sample random sample of 500 people
reveals that 450 of...
10) In a random sample of 450 people aged 20-24, 22% were smokers, random sample of...
10) In a random sample of 450 people aged 20-24, 22% were smokers, random sample of 400 people aged 25-29, 16% were smokers. a) (4 points) When constructing a confidence interval for the difference between the population proportions of smokers, what must be true in order for the standard normal distribution to be used as an approximation? Show your work please b) (3 points) Construct a 95% confidence interval for the difference between the population proportions of c) (3 points)...
A random sample of 500 people is taken. 260 of them rent (as oppose to own)...
A random sample of 500 people is taken. 260 of them rent (as oppose to own) their residence. Compute a 95% confidence interval for the true proportion of people who rent their residence. Enter the upper bound of this confidence interval. Round your answer to two decimal places.
Independent random samples were selected from two binomial populations, with sample sizes and the number of...
Independent random samples were selected from two binomial populations, with sample sizes and the number of successes given below. Population 1 2 500 500 120 147 Sample Size Number of Successes Construct a 95% confidence interval for the difference in the population proportions. (Use P, - Pg. Round your answers to four decimal places.) - 1087 to
Independent random samples were selected from two binomial populations, with sample sizes and the number of...
Independent random samples were selected from two binomial populations, with sample sizes and the number of successes given below. Population 1 2 500 500 119 148 Sample Size Number of Successes State the null and alternative hypotheses to test for a difference in the two population proportions. O Ho: (P1-P2) # O versus H: (P1-P2) = 0 O Ho: (P1-P2) = 0 versus Hy: (P1-P2) > 0 HO: (P1-P2) < 0 versus Ha: (P1-P2) > 0 HO: (P1-P2) = 0...
8. A random sample of 25 college males was obtained and each was asked to report...
8. A random sample of 25 college males was obtained and each was
asked to report their actual height and what they wished as their
ideal height. A 95% confidence interval for μd= average difference
between their ideal and actual heights was 0.8" to 2.2". Based on
this interval, which one of the null hypotheses below (versus a
two-sided alternative)can be rejected?
A. H0: μd= 0.5
B. H0: μd= 1.0
C. H0: μd= 1.5
D. H0: μd= 2.0
9. The...
Two different simple random samples are drawn from two different populations. The first sample consists of 40 people wit...
Two different simple random samples are drawn from two different populations. The first sample consists of 40 people with 21 having a common attribute. The second sample consists of 2000 people with 1429 of them having the same common attribute. Compare the results from a hypothesis test of p 1=p2 (with a 0.05 significance level) and a 95% confidence interval estimate of p 1-p2. What are the null and alternative hypotheses for the hypothesis test? What is the test statistic?...
(1 point) For each problem, select the best response. (a) A simple random sample of size...
(1 point) For each problem, select the best response. (a) A simple random sample of size n is defined to be A. a sample of size n chosen in such a way that every unit in the population has the same chance of being selected. B. a sample of size n chosen in such a way that every set of n units in the population has an equal chance to be the sample actually selected. C. a sample of size...
1 point) For each problem, select the best response. (a) A simple random sample of size...
1 point) For each problem, select the best response. (a) A simple random sample of size n is defined to be A. a sample of size n chosen in such a way that every unit in the population has a known nonzero chance of being selected. B. a sample of size n chosen in such a way that every unit in the population has the same chance of being selected. C. a sample of size n chosen in such a...
A sample of 10-year-old children found that they receive the following weekly allowances: $6, $1, $2,...
A sample of 10-year-old children found that they receive the following weekly allowances: $6, $1, $2, $10, $4, $3, $9. What is the sample mean? Answer choices: $4, $5, $6, $7 114 out of 150 customers at a bank said that they prefer to use ATMs rather than going to a live teller. What is the sample proportion of bank customers who prefer to use ATMs? Answer choices: 0.68, 0.72, 0.76, 0.80 Which sample size would give the best estimate...
I need help with 8.45 but youll need 8.38 for that 8.45 Sample size for coffee....
I need help with 8.45 but youll need 8.38 for that
8.45 Sample size for coffee. Refer to Exercise 8.38 where we analyzed data from a matched pairs study that compared preferences for instant versus fresh-brewed coffee. Suppose that you want to design a similar study. The null hypothesis is that instant and fresh-brewed are equally likely to be preferred and the alternative is two- sided. You will use a = 0.05. What is the sample needed to detect a...
10) In a random sample of 450 people aged 20-24, 22% were smokers, random sample of 400 people aged 25-29, 16% were smokers. a) (4 points) When constructing a confidence interval for the difference between the population proportions of smokers, what must be true in order for the standard normal distribution to be used as an approximation? Show your work please b) (3 points) Construct a 95% confidence interval for the difference between the population proportions of c) (3 points)...
Independent random samples were selected from two binomial populations, with sample sizes and the number of successes given below. Population 1 2 500 500 120 147 Sample Size Number of Successes Construct a 95% confidence interval for the difference in the population proportions. (Use P, - Pg. Round your answers to four decimal places.) - 1087 to
Independent random samples were selected from two binomial populations, with sample sizes and the number of successes given below. Population 1 2 500 500 119 148 Sample Size Number of Successes State the null and alternative hypotheses to test for a difference in the two population proportions. O Ho: (P1-P2) # O versus H: (P1-P2) = 0 O Ho: (P1-P2) = 0 versus Hy: (P1-P2) > 0 HO: (P1-P2) < 0 versus Ha: (P1-P2) > 0 HO: (P1-P2) = 0...
8. A random sample of 25 college males was obtained and each was
asked to report their actual height and what they wished as their
ideal height. A 95% confidence interval for μd= average difference
between their ideal and actual heights was 0.8" to 2.2". Based on
this interval, which one of the null hypotheses below (versus a
two-sided alternative)can be rejected?
A. H0: μd= 0.5
B. H0: μd= 1.0
C. H0: μd= 1.5
D. H0: μd= 2.0
9. The...
I need help with 8.45 but youll need 8.38 for that
8.45 Sample size for coffee. Refer to Exercise 8.38 where we analyzed data from a matched pairs study that compared preferences for instant versus fresh-brewed coffee. Suppose that you want to design a similar study. The null hypothesis is that instant and fresh-brewed are equally likely to be preferred and the alternative is two- sided. You will use a = 0.05. What is the sample needed to detect a...
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