That is a sampling distribution of a sample statistic?
Q: for the following distribution -1,5,6. what is the sample variance?
A: Given data -1,5,6
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Q: Examples of the independent and paired-samples t-test?
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A: Answer Given The total sample size [n] = 1872p1 = 31.7% = 0.317p2 = 54.6% =0.546p3 = 2.4% = 0.024p4…
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A: X¯ ~ N(μx¯, σx¯) Sampling distribution of the sample mean .
Q: None
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Q: Find the mean of the sample mean. [Select] Find the standard error of the sample mean. [Select]
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Q: Suppose that in a large population of students, the mean amount of sleep the previous night was ? =…
A: Solution
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- Online customer service is a key element to successful online retailing. According to a marketing survey, 30% of online customers take advantage of the online customer service. Assume the population proportion of those who use online customer service is 0.30. Random samples of 100 customers are selected. 95% of the sample proportions centered symmetrically about the sampling distribution mean will be between _________________ and _________________.John is interested in the number of children per household for house-holds in Tyler, TX. He conducts several phone interviews and collects the following data: 0 3 2 0 2 1 1 0 6 1 (a.) Find the mean, median, and 10%-trimmed mean. (Handwritten) (b.) Find the upper and lower quartiles. (Handwritten) (c.) Find the range, sample variance, sample standard deviation, and interquartilerange. (Handwritten)Find sample variance and standard deviation for thefollowing frequency distribution. Class f5.5 – 10.5 210.5 – 15.5 315.5 – 20.5 520.5 – 25.5 425.5 – 30.5 230.5 – 35.5 2
- Get the variance of the sampling distributionA survey was done of 40 people. They were asked: What type of movies would you like to see at this theater? Family, children, comedy, sci-fi, horror, action, or double feature? 40 people answered the following: Family: 37 Children: 18 Comedy: 26 Sci-fi: 12 Horror: 6 Action: 18 Double Feature: 19 Find the following: Probability Frequency Mean Median Mode Variance or Standard DeviationThe Census Bureau gives this distribution for the number of people in American households in 2016. Family size 1 2 4 6. 7 Proportion 0.28 0.35 0.15 0.13 0.06 0.02 0.01 Note: In this table, 7 actually represents households of size 7 or greater. But for purposes of this exercise, assume that it means only households of size exactly 7. Suppose you take a random sample of 4000 American households. About how many of these households will be of size 2? Sizes 3 to 7? The number of households of size 2 is about The number of households of size 3 to 7 is about
- Briefly explain Random Sampling Error.?Suppose that in a large population of students, the mean amount of sleep the previous night was ? = 7.2 hours and the standard deviation was ? = 1.55 hours. Consider randomly selected samples of n = 130 students. (a) What is the value of the mean of the sampling distribution of possible sample means?Mean = (b) Calculate the standard deviation, s.d., of the sampling distribution of possible sample means. (Round your answer to three decimal places.) s.d.(x) = (c) Use the Empirical Rule to find values that fill in the blanks at the end of the following sentence. (Round your answers to three decimal places.) For 68% of all randomly selected samples of n = 130 students, the mean amount of sleep the previous night will be between and hours. (d) Use the Empirical Rule to fill in the blanks at the end of the following sentence. (Round your answers to three decimal places.) For 95% of all randomly selected samples of n = 130 students, the mean amount of sleep will be between and hours.I want a clear explanation.Plz, do asap.
- A professor wants to know whether or not there is a difference in comprehension of a lab assignment among students depending on if the instructions are given all in text, or if they are given primarily with visual illustrations. She randomly divides her class into two groups of 15, gives one group instructions in text and the second group instructions with visual illustrations. The following data summarizes the scores the students received on a test given after the lab. Let the populations be normally distributed with a population standard deviation of 5.32 points for both the text and visual illustrations. Text (Group 1) Visual Illustrations (Group 2) 57.3 59 45.3 57.6 87.1 72.9 61.2 83.2 43.1 64 87.3 76.7 75.2 78.2 88.2 64.4 67.5 89 86.2 72.9 67.2 88.2 54.4 43.8 93 97.1 89.2 95.1 52 84.1 Is there evidence to suggest that a difference exists in the comprehension of the lab based on the…D and E will add follow up question12need help with parts A, D and E please