1.47 Means and SDs. For each part, compare distributions (1) and (2) based on their means and sta...
Means and SDs For each part, compare distributions (1) and (2) based on their means and standard deviations. You do not need to calculate these statistics; simply state how the means and the standard deviations compare. You will need to look at Exercise 1.47 in OpenIntro Statistics to answer these questions There are two correct answers to each part below; select them both. 1.47 Means and SDs. For each part, compare distributions (1) and (2) based on their means and...
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For most distributions, we can use the normal distribution to make a confidence interval for a populatiorl mean provided that the population standard deviation σ is known and the sample size is: O greater than or equal to 30. O greater than 100 O greater than 30. O less than 25.
For each part create two different data distributions ( data sets ) having the specified properties by choosing nine values from the set {1, 2, 3, 4, 5} and construct a histogram of each of your two distributions. a- The two distributions have equal means but different standard deviations. b- The two distributions have different means but equal standard deviations. c- The two distributions have equal means and equal standard deviations (but the means need not equal the standard deviations)
Consider a situation where we want to compare means, M1 and 42 of two populations, Group 1 and Group 2, respectively. A random sample of 40 observations was selected from each of the two populations. The following table shows the two-sample t test results at a = 5% assuming equal population variances: t-Test: Two-Sample Assuming Equal Variances Group 2 28652 33.460 40 Mean Variance Observations Pooled Variance Hypothesized Mean Difference d t Stat PTcut) one-tail Critical one-tail PTC-t) two-tail Critical...
How are the two distributions different? How are the two distributions different? -3 -2 -1 2 A and B are not significantly different A and B have different standard deviations and means A and B have different mean values A and B ha ve different standard deviations
Please help me find the answers to the last two problems step by step. The average playing time of compact discs in a large collection is 35 minutes, and the standard deviation is 5 minutes. (a) What value is 1 standard deviation above the mean? 1 standard deviation below the mean? What values are 2 standard deviations away from the mean? 1 standard deviation above the mean 1 standard deviation below the mean 30 2 standard deviations above the mean...
1) the distribution and histogram of individual penny dates for the entire class (this will be our population), Math/BSAD 2170 Sampling Distributions and Central Limit Theorem 2) the distribution and histogram of the means from samples of 5 pennies (this is called a sampling distribution with n 5), 3) the distribution and histogram of the means from samples of 10 pennies (a sampling distribution with n 10), and 4) the distribution and histogram of the means of each sample of...
This Assignment worth 5 marks. Good Luck! 1) (1.5 marks) in a class of 25 students, 24 of them took an exam in class and 1 student took a make-up exam the following day. The professor graded the first batch of 24 exams and found an average score of 74 points with a standard deviation of 8.9 points. The student who took the make-up the following day scored 64 points on the exam. (a) Does the new student's score increase...
4 The Sampling Distributions of Means and Proportions The Central Limit Theorem] Suggested Reading #6 (The Central Limit Theorem) 41 Ponder this and calculate: Consider all possible random samples of 5 in a class of 28 many different samples are there? Show your work (not as tedious as it appears) Note: Please continue to use the algebraic notation, as discussed in class, to obtain the answer e.9. Px<54) or P (x> 112)-1-P(x< 112)-1-Pizs ete. 4.2 A nurse supervisor has found...