You wish to estimate the average amount of money spent on holiday gift giving. You sample 50 people and you find a sample average of $275 with a sample standard deviation of $15. Which distribution should be used in developing an interval estimate For the population mean? O a. standard distribution O b.z distribution O c. binomial distribution O d.t distribution

Q: In the diagram, about 68% of the scores fall within the shaded area, which is symmetric about the…

A: For 68%; Range can be given as Mean +/- SD

Q: Complete the sentence below. The standard deviation of the sampling distribution of x, denoted o, is…

A: The standard deviation of the sampling distribution of xbar denoted by Sigma(xbar) is…

Q: n a final examination in mathematics, the mean was 72 and the standard deviation was 15. Determine…

A: Given : On the final examination in Mathematics ; Mean (μ) = 72 Standard deviation (σ) = 15 Let X be…

Q: A standardized memory test has a mean of µ = 100 and a standard deviation of σ = 10. Answer the…

A:

Q: You are given the following information for a sample (mean = 40; standard deviation = 5). In the…

A: It is required to calculate the raw score for letter f which means the score that is two standard…

Q: What was the age distribution of prehistoric Native Americans? Extensive anthropological studies in…

A: For a set of n observations, x1, x2, ... , xn with frequencies f1, f2, … , fn, mean is given by,…

Q: 4. The lowest and the highest data value of a data set are 12 and 28 respectively, then the…

A: Hey there! Thank you for posting the question. Since there are multiple questions posted, we will…

Q: Refer to the accompanying table, which describes the number of adults in groups of five who reported…

A: Given,

Q: What was the age distribution of prehistoric Native Americans? Extensive anthropological studies in…

A: In principle, in order to compute descriptive statistics for grouped data we need to estimate a…

Q: What was the age distribution of prehistoric Native Americans? Extensive anthropological studies in…

A:

Q: The mean and standard deviation of a population are 200 and 20, respectively. Suppose samples of…

A: We have given that, Population mean (μ) = 200, standard deviation (σ) = 20 and sample size (n) = 36…

Q: 2. For a standard normal distribution, find the percentage of data that are between 3 standard…

A: 68% area cover from mean-1standard deviation to mean+1standard deviation  95% area cover from…

Q: What was the age distribution of prehistoric Native Americans? Extensive anthropological studies in…

A: Given Information: Age range  Number of individuals (f) 1 - 10 32 11 - 20 17 21 - 30 15…

Q: "In a data set of exam scores, the mean is found to be 32 and the median is a 20. What type of…

A: The given information is, Mean = 32 Median = 20

Q: PaL uIM pa 484 and standard deviation 115. Use the normal distribution to answer the following…

A: Given : It has been found that scores on the writing portion of the SAT exam are normally…

Q: A standardized memory test has a mean of µ = 100 and a standard deviation of σ = 10. Answer the…

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: Pregnant women (within month 4) who are being followed up by a nutritionist had weights (kg) equal…

A: Given that  Pregnant women (within month 4) who are being followed up by a nutritionist had weights…

Q: Given the histogram and descriptive statistics of the image below, describe the shape, and wihat…

A: Given : Mean = μ = 8.44 Median = 7.09 Standard deviation = σ = 2.47 Sample size = n = 500

Q: What was the age distribution of prehistoric Native Americans? Extensive anthropological studies in…

A:

Q: In the diagram below, what is the value of the standard deviation? What is the mean? 4.0 4.5 5.0 5.5…

A:

Q: In a recent study on world​ happiness, participants were asked to evaluate their current lives on a…

A: Given that mean =5.4,s.d =2.6 ​(a) What response represents the88th​percentile?​(b) What response…

Q: Use the normal distribution to the right to answer the questions. Standardized Test Composite Scores…

A: Given μ = 19.7 and σ = 5.1 Let X ~ N( μ = 19.7, σ = 5.1)

Q: What was the age distribution of prehistoric Native Americans? Extensive anthropological studies in…

A:

Q: What is the correct test statistic table to use when you are comparing the mean weight of a sample…

A: For comparing the mean weight of a sample chairs when the population standard deviation is unknown,…

Q: 18. What percentage of a normal distribution is within 2 standard deviation of the mean? A. About…

A: Hello. Since your question has multiple, we will solve first two question for you. If you want…

Q: Consider the following sample data. Sample A: 13, 23, 33 Sample B: 71, 81, 91 Sample C: 1,050;…

A: Given data: Sample A: 13, 23, 33 Sample B: 71, 81, 91 Sample C: 1,050; 1,060; 1,070 To…

Q: n a recent study on world​ happiness, participants were asked to evaluate their current lives on a…

A: Given X is normal Distributed with mean µ = 5.7 and standard deviation σ = 2.3 now will use standard…

Q: Using Chebyshev's rule, at least what percent of the distribution lies between 3 standard deviations…

A:

Q: 12. It is the square of the population standard deviation. Answer:

A: ( 12 ) It is the square of the population standard deviation .

Q: What was the age distribution of prehistoric Native Americans? Extensive anthropological studies in…

A: Mean: The general formula to obtain the mean of a grouped data is, Mean = (∑fm)/N The below table…

Q: In a particular examination, the mean score is 82 and the standard deviation is 3.7. What is the Z-…

A:

Q: Refer to the accompanying table, which describes the number of adults in groups of five who reported…

A: The mean for the number of sleepwalkers in groups of five is,…

Q: You survey 5 of your friends regarding their score on a test. The results are as follows: 80 50 95…

A: Solution: Let X be the test score. The given data is 80, 50, 95, 90 and 70.

Q: Refer to the accompanying table, which describes the number of adults in groups of five who reported…

A: See the handwritten solution

Q: Which statement about standard error is false? O A. It is a measure of the variability of a…

A: We need to find, which statement about standard error is false:- A. It is a measure of the…

Q: Use a normal distribution table or a statistical calculator to answer this question. A farm…

A:

Q: What was the age distribution of prehistoric Native Americans? Extensive anthropological studies in…

A: Introduction: For a grouped data with k classes having class marks xi, class frequency fi (i = 1, 2,…

Q: The mode of a normal distribution is 65.5 and the standard deviation is 8.4. Then what is the median…

A: Givenmode = 65.5standard deviation = 8.4

Q: There is an average of 4 accidents in a week on a major highway in the city. What is the standard…

A:

Q: Refer to the accompanying table, which describes the number of adults in groups of five who reported…

A: Given Solution: The following is the data provided:

Q: Baby weights: According to a recent National Health Statistics Reports, the weight of male babies…

A: Consider x be a random variable indicates the weight of the babies which follows normal distribution…

Q: Refer to the accompanying table, which describes the number of adults in groups of five who reported…

A:

Q: Use the normal distribution of SAT critical reading scores for which the mean is 514 and the…

A: GivenMean(μ)=514standard deviation(σ)=115

Q: 65. What is the standard error for a distribution of sample means with a population standard…

A: It is given that, Population standard deviation, σ=12 Sample size, n=10

Q: The average income in a state was ​$64 comma 64,000 per person per year. Suppose the standard…

A: It is given that the average income of residents in a state is 64,000 and standard deviation is…

Q: What was the age distribution of prehistoric Native Americans? Extensive anthropological studies in…

A: Age range in years  Number of individuals (f)  Midpoints (x) f*x f*x2 1-10 39 (1+10)/2 = 5.5…

Q: (a) In the calculation of which of the following summary statistics, all the data in the data set…

A: Note: Hi, thank you for the question. As per our company guideline we are supposed to answer only…

Q: What was the age distribution of prehistoric Native Americans? Extensive anthropological studies in…

A:

Q: find the mean and standard deviation for A B C Sample a: 12. 21.30 Sample b: 70, 79,88 Sample…

A: Given information- We have given 3 samples. Sample a, sample b, sample c. We have to find the mean…

Q: Refer to the accompanying table, which describes the number of adults in groups of five who reported…

A: Given data,   Mean=? Standard deviation =?

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.