A toy manufacturer wants to know how many new toys children buy each year. Assume a previous study found the variance to be 1.44 He thinks the mean is 5.65 toys per year. What is the minimum sample size required to ensure that the estimate has an error of at most 0.11 at the 95% level of confidence? Round your answer up to the next integer.

Q: Use the Sprint data, given again below, to test whet month than men do at the 5% significance level.…

A: Given the data as Men Women 314 492 324 803 288 476 561 370 295 525 299 317 319 625…

Q: Micheal invested $2000 in a certain stock. At the end of the year the stock could be worth $1600,…

A: Given: Micheal invested $2000 in a certain stock. At the end of the year the stock could be worth…

Q: The sum of the squared deviation scores is SS = 20 for a population of N = 5 scores. What is the…

A:

Q: ou When bears were anesthetized, researchers measured the distances (in inches) around their chests…

A: We have to find that which test is use...

Q: Dr. Samwell Tarly wants to estimate the number of books checked out of the library in the past year.…

A: It is given that the mean is 10,000 and the standard deviation is 10.

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: QUESTION 2 The symbol used for the variance of the sample is 00 b. 02. C. S. d. s2.

A: a) population standard Deviation = σ b) Population Variance = σ2 c) Sample standard Derivation = s…

Q: One sample with n = 4 scores has a mean of M = 12, and a second sample with n = 6 scores has a mean…

A:

Q: Body temperature (in degrees Fahrenheit) of randomly selected normal and healthy adults are shown…

A:

Q: Here are 6 celebrities with some of the highest net worths​ (in millions of​ dollars) in a recent​…

A: The number of observations is n = 6.

Q: Twelve percent of U.S. employees who are late for work blame oversleeping. You randomly select four…

A:

Q: Aspirin prevents blood from clotting and helps prevent strokes. The Second European Stroke…

A: It is given that both sample sizes are 200, number of strokes for aspirin alone is 60 and number of…

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

A:

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A: The range is the difference between the highest and lowest values in the dataset. In this case, the…

Q: Please answer this one.Thanks! Given the sample data below: x  46  37  40  33  42  36  40  47  34…

A: Given : Sample size (n) = 10 x 46 37 40 33 42 36 40 47 34 45

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: |(a) What are the null hypothesis Ho and the alternative hypothesis Hj that should be used for the…

A: Test is that whether the mean weight of babies is greater than 7.2 pound. The type I error is…

Q: The summary data from study demonstrates a stronger relationship between how many minutes per day a…

A: Given : A standard deviation is a measure of how dispersed the data is in relation to the mean. Low…

Q: Manny Mevito wants to study whether the height (in inches) of an engineer determines how many…

A: A one-way ANOVA tests the significant difference in group means for more than two groups.

Q: Jed raises chickens.  He says that the average chicken weight is 5.5 lbs.  Test his claim.  A simple…

A:

Q: Current estimates suggest that 55% of the home-based computers in a foreign country have access to…

A: From the provided information, 55% of the home-based computers in a foreign country have access to…

Q: Q8. What happens to the standard error of an estimate when the sample size in a simple random sample…

A:

Q: Which of the following values will give us the most relevant information about a particular group of…

A: Hint: Different data sets may have the same mean. So, the Mean is not enough to get the relevant…

Q: A researcher wants to know if there is a difference in how busy someone is based on whether that…

A: To test if there is any difference in how busy someone is based on whether that person identifies as…

Q: What statistical calculation, which results in the same units as the measured data, represents the…

A: Introduction: For a random variable X taking n sample values, the sample variance is given by the…

Q: he highway mileage (mpg) for a sample of 8 different models of a car company can be found below.…

A: The given sample is 30, 35, 22, 19, 29, 35, 27, 26.

Q: Scores 51-58 59-66 67-74 Class Mark, A 54.5 62.5 70.5 Frequency, 3 7 15

A: The given data is; Scores Class Mark, x Frequency, f 51-58 54.5 3 59-66 62.5 7 67-74 70.5…

Q: Aspirin prevents blood from clotting and helps prevent strokes. The Second European Stroke…

A: Given ,  Aspirin alone :  Sample size = n1 = 200  Number of strokes = x1= 60 Sample proportion = p^1…

Q: The battery life of the new iPad Mini introduced Apple is uniformly distributed between 8.5 and 12…

A: Formula is:

Q: For effect sizes, which one does not measure the proportion of variance accounted for (i.e.…

A: The objective is to identify the option, which does not measure the proportion of explained…

Q: Which of the following values will give us the most relevant information about a particular group of…

A: Population Mean The mean of the total population considered for the study Population Variance The…

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: In a sample of 81 elements, the mean was 60 and the variance was 144. What is the standard error for…

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 population average test scores in Chemistry class of high schoolers who watched…

Q: Which of the following values will give us the most relevant information about a particular group of…

A: Sol:- Correct option :-

Q: alculate the variance of 13, 25, and 16, using the sum of squares formula (also known as the…

A: We have given that data  13 ,25,16  I want to find variance  Variance = (∑x2 - (∑x)2/n)/(n-1)

Q: is the variance of distribution?

A: It is given that the probability distribution of X in the solution of the problem. Also we have Mean…

Q: The table below shows the age distribution of a sample of 150 students at UCC. Find an estimate of…

A: Data given Let X=Age , Number =f  Age Number  25 - 34 33 35 - 44 39 45 - 54 48 55 - 64 30

Q: Why is it useful to know the standard error of the mean? (Choose all that are correct.) It is…

A: here we know that Standard error is the standard deviation of its sampling distribution. or an…

Q: This histogram shows the heights of 20 students in a statistics class. Explain why it is not…

A: The answer is A because the histogram shows a bimodal distribution and it has two distinct peaks,…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.