Suppose an item follows a binomial distribution with a constant but unknown p. If 81 sample cases or trials are draw from this distribution and the number of successes is 67, find the 95% confidence interval for the unknown proportion based on the 67 of successes out of 81 trials.

Q: A recent year was randomly picked from 1985 to the present. In that year, there were 2051 Hispanic…

A: Given, x1 = 2051 n1 = 12328 x2 = 321 n2 = 2441 α = 0.1       To find, 90% confidence interval for…

Q: Suppose that the a college wants to have an idea of the average SAT score of the incoming freshman…

A: The confidence level is 0.90, the standard deviation is 310 and margin of error E is 50.

Q: An accounting firm has 1200 clients. From a random sample of 120 clients, 110 indicated very high…

A: Given : An accounting firm has 1200 clients So,  Population size (N) = 1200 Sample size (n) = 120…

Q: If a school district takes a random sample of 75 Math SAT scores and finds that the average is 433,…

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Q: A survey found that out of 900 workers, 150 said they were interrupted by frank phone calls. Find…

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Q: 324 out of a simple random sample of 400 students hated their online math course. Find a 99%…

A: Given: Number of students that hated the online math course (y) = 324 Number of students (n) = 400…

Q: when 282 college students are randomly selected and surveyed, it is found that 109 own a car. find a…

A: It is given that sample size (n) is 282 and x is 109.

Q: What formulas are used to find the confidence interval? Researchers comparing the effectiveness of…

A: According to the given information in this questionWe need to construct 95% confidence interval

Q: If n= 220, p-hat= .4, then what will be the 87.4% confidence interval for the population proportion?

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Q: If a school district takes a random sample of 50 Math SAT scores and finds that the average is 47,…

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Q: If N=480 and p̂ (p-hat) =0.88, find the margin of error at a 95% confidence level.

A: From the provided information, Sample size (n) = 480 p̂ (p-hat) =0.88 Confidence level = 95%

Q: In a sample of 900 people, 378 say they snooze the alarm more than once in the morning. Find a 95%…

A: Given,   The sample proportion is,

Q: Out of 500 people sampled, 145 received flu vaccinations this year. Based on this, construct a 90%…

A: We have given that  Sample size n=500 , favorable cases x=145 90% confidence interval  Sample…

Q: st with 2440 subjects, 70% showed improvement from the old treatment. While in a clinical test with…

A: Given: Sample Proportion 1 (\hat p_1)(p^​1​) = 0.700.70 Sample Size 1 (N_1)(N1​) = 24402440…

Q: A sociologist is comparing the proportion of teenage boys who receive a text message at least once…

A: The  Conditions for the Confidence interval for the difference in population proportions • Samples…

Q: When Mendel conducted his famous genetics experiments with peas, one sample of offspring consisted…

A: a. The sample proportion of yellow peas is, Thus, the sample proportion of yellow peas is 0.262.

Q: Of 130 adults selected randomly from one town, 25 of them smoke. Construct a 99% confidence interval…

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