test-taker. Suppose that you're interested in the mean score, μ , on this subsection among the general population. You decide that you'll use the mean of a random sample of scores on this subsection to estimate μ . What is the minimum sample size needed in order for you to be 95% confident that your estimate is within 4 of μ ? Use the value 23 for the population standard deviation of scores on this subsection. Carry your intermediate computations to at least three decimal places. Write your answer as a whole number (and make

Q: One sample of scores has a mean of M = 45 and a sample size of n = 10 scores.  A second sample of…

A:

Q: A union of restaurant and foodservice workers would like to estimate this year's mean hourly wage u…

A: Statistical hypothesis testing is an important method in inferential statistics. It is used to test…

Q: Wallace asked 30 participants to report on their political affiliation by marking "1" for liberal,…

A: Given that 30 participants  For liberal 1  For conservative 2  For not interested in poltics at all…

Q: You gather data from all Stonehill students, by asking them to complete a scale that measures levels…

A: You gather data from all Stonehill students, by asking them to complete a scale that measures levels…

Q: A new drug that has been on the market for only a few months is now being recalled because certain…

A: Given that A new drug that has been on the market for only a few months is now being recalled…

Q: With your sample of 25 inmates, you want to test if the population mean age is different from 40 at…

A: To determine whether the test should be one-tailed or two-tailed, we need to consider the research…

Q: An occupational therapist (OT) is comparing two different treatments to see which is more effective…

A: we have two groups one consisting of participants A, B, C, D and the other treatment is on…

Q: n 1971, there was a shift in attitudes, as Americans’ “ideal” family switched from four kids to two…

A: The median would stay the same as it is not affected by outliers   The mean would increase as it is…

Q: Use the sample mean(78.5)and sample standard deviation (12.3671)in your calculations below. Use…

A: Given that:

Q: A personality test has a subsection designed to assess the "honesty" of the test-taker. Suppose that…

A: The given margin of error is 5, population standard deviation is 20 and confidence level is 90%.

Q: Professor Tom knows that the mean score on the midterm exam from all the years he has been teaching…

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are…

Q: A personality test has a subsection designed to assess the "honesty" of the test-taker. Suppose that…

A:

Q: What is the best estimate of the mean household income in this county?

A:

Q: A newspaper infographic titled "Have a Nice Trip" summarized data from a survey of 1,000 U.S. adults…

A: The objective of the question is to estimate the population proportion of U.S. adults who have…

Q: A company wanted to determine the child care costs of its employees. A sample of 25 employees were…

A: Solution :  In above example a value of one of the sample change so we know that standard deviation,…

Q: Suppose that we know that 33.8% of the people born in the United States between 1936 and 1951 have…

A: The given situation follows binomial distribution. The proportion of people born in United States…

Q: For his statistics assignment, Johnson examineddifferences in quality of grades obtained by students…

A: Johnson examined differences in quality of grades obtained by the students on regular program of a…

Q: imagine you’re hired by a beef company called “American Beef Makers” as a Data Analyst and you’re…

A: Please note that as per our guidelines if multiple sub-parts are there in a question we can answer…

Q: Suppose you were given a data set, and you want to determine whether the distribution from which the…

A: A normal dist. is symmetric and has a bell-shaped curve.

Q: tor for a medical assistance program wishes to test the hypothesis that her students score higher…

A: As the population standard deviation is not known, we will use a t-test. The null and alternative…

Q: For the test described in Scenario A, 32 apartments were measured and the sample mean found to be…

A: Given that  Sample size n =32 Sample mean =1237 Standard deviation =45

Q: In a city with three high schools, all the ninth graders took a Standardized Test, with these…

A: We want to find mean score for all ninth graders in the city

Q: Which of the following is the appropriate null and alternative hypotheses for the test described in…

A:

Q: In the following situation we want to compare the mean responses in several populations.Are you a…

A: From the provided information, Morning people = 17 Evening people = 35 Number of people who were…

Q: For question #4, write your answer exactly as it appears. 4) It has been known that 18% of victims…

A:

Q: It was hypothesized that there will be a difference in the average test score in Chemistry class…

A: Denote μ1, μ2 as the true average test scores in Chemistry class between high schoolers who watched…

Q: You would like to construct a 99% confidence interval to estimate the population mean score on a…

A: Solution: Let X be the score. From the given information, x-bar=485 and S=70. Here, it needed to…

Q: Yessica thought that there was a correlation between the amount of time students slept the evening…

A: From the given information assume that x defines the sleep time the evening before the final exam…

Q: In the following situation we want to compare the mean responses in several populations.Are you a…

A: Given information- Number of groups (K) = 3 Total sample size, (N) = 111   Calculation of the degree…

Q: Corporate Farms. The U.S. Census Bureau estimates the mean value of the land and buildings per…

A:

Q: Suppose your statistics professor gave six examinations during the semester. You received the…

A: Given the scores:79,84,82,82,84,77

Q: It was hypothesized that there will be a difference in the average test score in Chemistry class…

A: Denote μ1, μ2 as the population average test scores in Chemistry class of high schoolers who watched…

Q: what is the conclusion of the test at 5 % level of significance

A:

Q: A social psychologist recently developed a childhood-memories test that is intended to measure how…

A: Hypothesis,  H0: The mean score is u= 60 H1: The mean score is not 60. u=! 60 Given that, Mean, x̄=…

Q: A survey of 1195 CEOS finds that 717 believe the economy will improve next year. We are trying to…

A: We have given that,  Population proportion (p)= 66% = 0.66 and favorable cases (X) = 717 , sample…

Q: A social psychologist recently developed a childhood-memories test that is intended to measure how…

A: The hypothesize mean is 60.

Q: A professor believes that his math students have different IQ than the average college students. He…

A: Given that, The random variable X is normally distributed. And sample size is 30=~ infinite so we…

Q: To investigate whether one-pound bags of potato chips actually contain a full pound of chips, a…

A: Testing of Hypothesis: Testing of hypothesis is a rule which, when the sample values have been…

Q: A personality test has a subsection designed to assess the "honesty" of the test-taker. Suppose that…

A: From the provided information, Confidence level = 90% Margin of error (E) = 5 Population standard…

Q: You are the product manager for Carl's ice cream. The company president asked you to determine if…

A: As per guidelines we will solve first question only, please repost other questions for more answers.…

Q: A personality test has a subsection designed to assess the "honesty" of the test-taker. Suppose that…

A: Given that  Confidence level (C)  = 95% = 0.95 The estimate is within 2 of μ Margin of error (E) = 2…