Step 1. Open Excel and complete first two columns with any numbers
Make 7-8 rows.
Type below first column "R = "
We will use Excel function CORREL(Array-1, Array-2).
STEP 2.
Click on cell B11 and type: =CORREL(
Highlight all numbers in A-column starting with cell A2 (do not include title).
That will be Array-1 (input range).
Type comma after Array-1 and highlight Array-2 from B-column.
Press ENTER. You will see in cell B11 Coefficient of Linear Correlation.
STEP 3. Analyze the R-value. Does it mean we have strong positive,
strong negative, weak correlation or none linear correlation.
Part 2. Apply t-Distribution to construct Confidence Interval for Population Mean (Chapter 10).
STEP 1. Open Excel and write any 7 numbers that represents Sample results.
STEP 2. Use Excel functions Average() and STDEV() to find sample mean <x>
and sample standard deviation (s).
STEP 3. Use the Table for t-Distribution Table t-Distribution.pdf to find t-value for row df= n-1 = 7-1 = 6
and column 0.05 in two tails (this will be 95% Confidence Interval).
Calculate the Margin of Error: E = t*s/√(n)
STEP 4. Write Confidence Interval for Population Mean in format:
<x> - E, <x> + E
Step 1. Open Excel and complete first two columns with any numbers Make 7-8 rows. Type...
Please show step by step work, thanks! 1. The CD4 T cell counts (x106/I) at baseline for a sample of 13 patients follows. 230 205 313 207 227 245 173 58 103 181 105 301 169 a) b)Determine a point estimate for the population mean CD4 T cell count. c) (assume the counts are normally distributed). d) (x 106 /1) . Based on the confidence interval from part (c), at a l0% significance level, do the sample data support this...
A recent article in BusinessWeek listed the “Best Small Companies.” We are interested in the relationship between the companies’ sales and earnings. A random sample of 12 companies wasselected and the sales and earnings, in millions of dollars, are reported below: Company Papa John’s InternationalApplied Innovation Integracare Wall Data Davidson & AssociatesChico’s FAS Checkmate Electronics Royal Grip M-Wave Serving-N-Slide Daig Cobra Golf Sales ($ millions) $29.2 18.6 18.2 71.7 58.6 46.8 17.5 11.9 19.6 51.2 28.6 69.2 Earnings ($ millions)...
Excel Lab 2: Regression and Goal Seek In this lab, you will use Excel to determine the equation of the model which best fits a set of ordered pairs obtained from data sets. You will enter data, graph the data, find the equation for the regression model, and then use that equation to make predictions for the dependent variable. You will use the goal seek to make predictions for the independent variable. Then you will consider how accurate your predictions...
2 Use Excel to find the following confidence intervals 110points total The feollowing data show the namber of paid vacation days for a random sample of 20 employees from PSU A1 a) Find the 95% confidence interval fr the average number of vacation days. (2 points for output. I point fr ower limit, I point for upper limit Copy the data below your name in cell A3 in Excel. Select the tab labeled Duta, then select Data Analysis If your...
need this answer asap please This Question: 1 pt 43 of 8 (2 complete)> This Quiz: 8 pts possible a. Use the one-mean t-interval procedure with the sample mean, sample size, sample standard deviation, and confidence level given below to find a confidence interval for the mean of the population from which the sample was drawn. b. Obtain the margin of error by taking half the length of the confidence interval. c. Obtain the margin of error by using the...
Excel was asked to generate 50 Poisson random numbers with mean λ = 5. x Frequency 0 1 1 1 2 4 3 7 4 7 5 8 6 10 7 3 8 3 9 4 10 1 11 1 (a) Calculate the sample mean. (Round your sample mean value to 2 decimal places.) Sample mean (b) Carry out the chi-square test at α = .05, combining end categories as needed to ensure that all expected frequencies are at least...
Please be as clear as possible, needs work and theorems explained/noted. No excel please, urgent thanks Textbook - Applied Statistics and Probability for Engineers by Montgomery, 6th Edition PART 1. For each of the following statements, circle the letter “T” if it is true, and “F” if it is false. TF If events A and B are mutually exclusive, they must be independent. т F P[A B C] P[CB] P[B] = P[CAB] P[AB] P[B]. T F If the 95% confidence...
This Question: 1 pt 8 of 12 (10 complete) This Test: 12 pts possible A simple random sample of size n=23 is drawn from a population that is normally distributed. The sample mean is found to be X = 68 and the sample standard deviation is found to be s = 20. Construct a 90% confidence interval about the population mean The lower bound is The upper bound is (Round to two decimal places as needed.) Enter your answer in...
Quiz: Quiz8 Time Remaining: 02:46:21 This Question: 1 pt This Quiz: 10 pt 7 of 10 A sample mean, sample size, population standard deviation, and confidence level are provided. Use this information to complete parts (a) through (c) below. x 53 n 13 g=6 confidence level = 99 % Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table a. Use the one-mean z-interval procedure to...
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