A variable of a population has a mean of μ = 84 and a standard deviation of a = 21. a. Identify the sampling distribution of the sample mean for samples of size 49. b. In answering part (a), what assumptions did you make about the distribution of the variable? c. Can you answer part (a) if the sample size is 25 instead of 49? Why or why not? a. What is the shape of the sampling distribution? O bimodal normal O skewed O uniform

Q: 1 The sample mean is _______. a 12.32     b 13.25     c 14.25     d 15.32

A:

Q: Q.: For the data given in the following frequency distribution table, compute if the nearest error…

A: As per our guidelines we can solve first three sub part of question and rest can be reposted.…

Q: A random sample of 60 households was selected for a phone survey. The key question asked was, "Do…

A: Given data:-          respondent, n=60          30 said yes have product of company A,…

Q: 16. For the following sample of n = 8 scores: 0, 1, 5. 0, 3, , 0, and 1: a. Simplify the arithmetic…

A: Solution : The complete solution is given below in the attachment file.

Q: 6. Ackerman and Goldsmith (2011) report that students who study from a screen (phone, tablet, or…

A: Given :  μ = 77 σ = 8  n = 16

Q: If X is normally distributed with a population mean of 123 and a population standard deviation of…

A: X is normally distributed with mean of 123 and standard deviation of 12.

Q: 1. The following are the test results for a grade 12 math class of 20 students: 82 85 94 96 72 79 81…

A: Given,  The test result for grade 12  class for 20 students. We have to find the solutions by using…

Q: A positive value of z indicates that the number of standard deviations of an observation is to the…

A: Objective of this question is that which option is the correct choice.

Q: a. Is there a significant difference on the ratings of the respondents on Product Line-X11) when…

A: Given information: The tables obtained using SPSS output are given.

Q: For numbers 20-24, refer to the following problem. A sample of 100 grade 10 students' ages was…

A: Hi! Thanks for posting the question. Since there are more than three multiple choice questions, we…

Q: In this problem, assume that the distribution of differences is approximately normal. Note: For…

A:

Q: . less than 24 mpg? B. 30 mpg or more? C. between 20 and 28? 2

A: Question 1)The mean of the distribuiton is  mpg. The standard deviation of the distribution is…

Q: Given below are the BMI statistics for random samples of males and females. 0.05. Test the claim…

A: From the provided information, n1=40x1=28.44075s1=7.394076n2=40x2=26.6005s2=5.359442α=0.05

Q: П. Distribution of Data - Bell Curve A test was given to 250 students. The mean was 80 and the…

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

Q: a. n=2 ∑ni=1xi=20. The mean is b. n=4 ∑ni=1xi=80 The mean is

A: It is given that,Part a) Part b) To find the mean value in both cases.

Q: It is called the properties of populations, like the mean or standard deviation, as they represent…

A: Here given, properties of populations, like the mean or standard deviation, as they represent the…

Q: lat fal betwéen and include t a. 50 to 75 b. 60 to 200 c. 70 to 280 d. 140 to 400 a. What is an…

A: Given: Sample size = N = 380 a).Maximum value = 75 Minimum value = 50 We use the following formula…

Q: he whether the normal distribution can be used to compare the following population proportions. n =…

A:

Q: Calculate the mean and SS (sum of squared tions) for each of the following samples. Based on the…

A:

Q: 28. Below is a relative frequency bar chart of the number of children in American households. The…

A: Since you have posted a question with multiple subparts, we will solve first three subparts for you.…

Q: Variable N Y 9 Mean 19.96 SE Mean ? Std. Dev. 3.12 Variance ? Minimum 15.94 Maximum 27.16

A: Given: N = 9 Mean μ = 19.96 Standard deviation σ = 3.12 Minimum = 15.94 Maximum = 27.16 Formula…

Q: Listed below are body temperatures from five different subjects measured at 8 AM and again at 12 AM.…

A: Given observation and calculation is shown below

Q: Assume that the values x below, represent data collected for a population. Calculate the summary…

A: For the given data mean =? s.d =? variance =?

Q: Answers only. Thank you 1. What is the lowest level of measurement required to determine the…

A:

Q: a. Explain what it would mean to make a type I error. Choose the correct answer below. A. A type I…

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

Q: Use the frequency distribution to construct a histogram. Does the histogram appear to depict data…

A: Use the frequency distribution to construct a histogram. Weight (g) Frequency 6.000-6.049 3…

Q: Consider a sample data set with the summary statistics s= 78, Q₁ = 30, and Qu= 180. a. Calculate…

A: S=78,QL=30, Qu=180

Q: nd the mean of the data summarized in the given frequency distribution. Compare the computed mean to…

A: The midpoint is, Speed Frequency midpoint fx 42-45 21 42+45/2=43.5 913.5 46-49 13 47.5 617.5…

Q: Cadmium, a heavy metal, is toxic to animals. Mushrooms, however, are able to absorb and accumulate…

A: Test is that whether the mean cadmium level in the sample is less than the governments' safety…

Q: The data in the table represent a possible starting lineup for a basketball team. Use the data to…

A: Given, The data in the table represent a possible starting lineup for a basket team.  Assume that…

Q: O a bar chart

A: A bar Chart plots levels of a categorical feature as bars. A box Plot considers numeric data as they…

Q: . The variance of a sample of data is 4. The standard deviation of this sample is: a) 16 b) 4 c) 2…

A:

Q: The amount of pollutants that are found in waterways near large cities is normally distributed with…

A:

Q: I have a statistics the question which on the attached image.

A: A) The mean of the data can be obtained as:

Q: For the following situation, find the mean and standard deviation of the population. List all…

A: Given Population : 500 , 628 , 544 , 611 , 584 .  First all possible sample of size 2 for the given…

Q: Q: The cotton plant lengths classified in the following table Length (cm) 31-40 frequency 1 41-50…

A: Mean is given by, Mean= (summation f*x)/(summation f) Where Xs are mid values of every class…

Q: Which of the following would be a point estimate for the population mean?

A: Here use definition of given terms

Q: We want to estimate the mean of a certain population, so we will collect a sample. Which should be…

A: Solution. If the large sample is taken from any population the distribution of the sample mean will…

Q: Bill Alther is a zoologist who studies Anna's hummingbird (Calypte anna). (Reference: Hummingbirds,…

A:

Q: elect ALL the ways that variation in the data can be measured below. A. The mean of the data B. The…

A: We have to find ways that variation in the data can be measured

Q: a. What is the experimental unit in this experiment?   b. What are the population and sample in…

A: The provided situation is, a researcher is interested in finding the mean and median lengths of all…

Q: A. What is the 95% Cl of a population mean when the mean of a sample is 10, the standard deviation…

A: (a) The provided sample mean is X¯=10 and the sample standard deviation is s=2. The size of the…

Q: A normal distribution has a mean of u = 80 with a = 20. What score separates the highest 15% of the…

A:

Q: ssume that adults have IQ scores that are normally distributed with a mean of 100 and a standard…

A: From the provided information, Mean (µ) = 100 Standard deviation (σ) = 15 X~N (100, 15) Here X be a…

Q: 25 30 61 48 42   a. Determine the population mean​ age, μ​, of the five winners

A: a) Mean (25+30+61+48+42)/5 =206/5 mean​ age =μ​=41.2   b) The mean of the variable x is…