For the following Before/After data, calculate the t-obtained for a Related-Samples t-test. Before After 10 12 14 12 11 3.83 O2.83 1.83 4.83 12 12 15 15 15

None

Q.28 only

3.2.41 Question Heip пер The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 249.5 and a standard deviation of 60.1. (All units are 1000 cells/µL.) Using the empirical rule, find each approximate percentage below. a. What is the approximate percentage of women with platelet counts within 1 standard deviation of the mean, or between 189.4 and 309.6? r.jp b. What is the approximate percentage of women with platelet counts between 69.2 and 429.8? a. Approximately % of women in this group have platelet counts within 1 standard deviation of the mean, or between 189.4 and 309.6. IMG 65 (Type an integer or a decimal. Do not round.) et Project w....pptx Chock Answer.

To test whether the mean time needed to mix a batch of material is the same for machines produced by three manufacturers, the Jacobs Chemical Company obtained the following data on the time (in minutes) needed to mix the material.   Manufacturer   1 2 3     17 28 24     23 26 23     21 31 27     19 27 26     a. Use these data to test whether the population mean times for mixing a batch of material differ for the three manufacturers. Use x=0.05.Compute the values below (to 2 decimals, if necessary).   Sum of Squares, Treatment   Sum of Squares, Error   Mean Squares, Treatment   Mean Squares, Error     Calculate the value of the test statistic (to 2 decimals). The p-value is  What is your conclusion? b. At the x=0.05 level of significance, use Fisher's LSD procedure to test for the equality of the means for manufacturers 1 and 3. Calculate Fisher's LSD Value (to 2 decimals). What conclusion can you draw after carrying out this test?

(10%) The following medians were obtained from random samples 11 10 13 9. 7 13 11 12 8 10 9 9. 15 7 14 16 7 12 10 12 8 9 15 10 12 6. 7 Do the data support the belief that the median is less than 10? Use a = .05

Two samples of n = 5 participants each generate the following data.  Calculate a t-test score for the difference of these two groups. Group 1 Group 2 2 3 3 3 2 2 2 2 1 2     t(8) = 2.86     t(8) = 2.29     t(8) = 2.5     t(8) = 1.11

For the following two samples, calculate the corresponding z-score to test whether the two means are the same: 1. Sample 1, E(x1)=21, s1=7, n1=120 2. Sample 2: E(x2)=18.3, s2=11, n2=100 The Z-scores is: Answer: