The accompanying data set gives the additional sleep in hours obtained by a sample of 10 patients using a certainsleep aid. Preliminary data analyses indicate that the t-interval procedure can reasonably be applied. Completeparts (a) and (b) below.Click here to view the additional sleep hours. Click here to view page 1 of the t-table.Click here to view page 2 of the t-table.a. Obtain and interpret a 90% confidence interval for the additional sleep that would be obtained on average for allpeople using the sleep aid. (Note: x=2.42 hr and s=2.124 hr.)The 90% confidence interval is from hour(s) to hour(s).(Round to two decimal places as needed.)Additional Sleep Hours1.90.71.30.0-0.2 5.74.51.74.9+33.70-X

Mean = 2.42 Standard deviation = 2.124Sample size = 10

Answered: The accompanying data set gives the…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A recent study of high school students shows the percentage of females and males who have an after-school job. A simple random sample of high school students was interviewed. The students were asked whether they worked after school. Of the 250 females, 58 answered yes, as did 113 of the 380 males. Part A: Construct and interpret a 95% confidence interval for the difference in population proportions of females and males who have an after-school job. Be sure to state the parameter, check conditions, perform calculations, and make conclusion(s). Part B: Does your interval from part A give convincing evidence of a difference between the population proportions? Explain.
Please answer the following question and include all conditions that need to be met and the type of test that needs to be performed. Please show the steps of how to calculate using the graphing calculator.
0.56 ppm is the maximum authorized concentration of phosphate in drinking water. Given below is the analysis of various samples of bottled water from the same batch of production. Is there an outlier present in the data set at 95% confidence interval? What is the t-tab and t-calc for the data set? Can the water be used for drinking? Use outlier tests Sample Phosphate (ppm) 1 0.26 2 0.46 3 0.41 4 0.49 5 0.38
For the data set below, calculate r, r2, and a 95 percent confidence interval in r units. Then write a one- to two sentence conclusion statement that includes whether the null hypothesis was rejected or not and whether there is a strong /weak/no relationship. Assume a two tailed hypothesis and α = .05. Case 1 Case 2 Case 3 Case 4 Case 5 Case 6 X 1.05 1.15 1.30 2.00 1.75 1.00 Y 2 2 3 4 5 2
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The accompanying data set gives the additional sleep in hours obtained by a sample of 10 patients using a certain sleep aid. Preliminary data analyses indicate that the t-interval procedure can reasonably be applied. Complete parts (a) and (b) below. Click here to view the additional sleep hours. Click here to view page 1 of the t-table. Click here to view page 2 of the t-table. ..... a. Obtain and interpret a 99% confidence interval for the additional sleep that would be obtained on average for all people using the sleep aid. (Note: x = 2.50 hr and s= 2.017 hr.) The 99% confidence interval is from hour(s) to hour(s). (Round to two decimal places as needed.) Additional sleep hours 2.2 1.4 0.0 5.7 4.7 1.1 0.1 4.5 1.6 3.7 Print Done
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The accompanying data set gives the additional sleep in hours obtained by a sample of 10 patients using a certain sleep aid. Preliminary data analyses indicate that the t-interval procedure can reasonably be applied. Complete parts (a) and (b) below. Click here to view the additional sleep hours. Click here to view page 1 of the t-table, Click here to view page 2 of the t-table Roman a. Obtain and interpret a 99% confidence interval for the additional sleep that would be obtained on average for all people using the sleep aid. (Note: x=1.99 hr and s1.996 hr.) les No The 99% confidence interval is fromhour(s) tohour(s) (Round to two decimal places as needed.)
Early-childhood-development studies indicate that the more often a child is read to from birth, the earlier the child begins to read. A local parents’ group wants to test this theory and samples families with young children. They find the following results. Construct a 99% confidence interval to estimate the true difference between the proportions of children who read at an early age when they are read to frequently compared to those who were read to less often, as described in the table of results. Let Population 1 be the children who were read to frequently and Population 2 be the children who were read to less often. Round the endpoints of the interval to three decimal places, if necessary. Ages when Children Begin to Read Read to at Least Three Times per Week Read to Fewer than Three Times per Week Started Reading by age 4 60 35 Started Reading after age 4 36 51 Lower end point: Upper end point:
Please use the accompanying Excel data set or accompanying Text file data set when completing the following exercise. The yield of a chemical process is being studied. From previous experience, yield is known to be normally distributed and o = 3. The past five days of plant operation have resulted in the following yields 91.6, 88.75, 90.8, 89.66, and 91.5. Find a 95% two-sided confidence interval on the true mean yield. (a) Calculate the sample mean. Round your answer to 2 decimal places. x = i 90.524 (b) Calculate the 95% two-sided confidence interval on the true mean yield. Round your answers to 1 decimal place. 87.9 <μ< 93.2

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