The annual earnings (in dollars) of 35 randomly selected microbiologists are shown in the data table. Use the data to (a) find the sample mean, (b) find the samplestandard deviation, and (c) construct a 98% confidence interval for the population mean.99,62180,51377,693 67,461 51,29767,571 93,78465,85178,60847,39574,507 44,533 86,974 61,16757,922 55,19478,42799,43980,70592,60563,09574,68150,53261,08291,97383,61080,49464,12574,60956,890 47,27689,61775,328 61,72982,917(a) Find the sample mean.(Type an integer or decimal rounded to two decimal places as needed.)

Given data The annual earnings(in dollars) of 35 randomly selected micro biologists 99,621 80,513…

Answered: The annual earnings (in dollars) of 35…

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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The average weekly incomes, in £s, of 18 selected occupations in the United Kingdom were: 244, 146, 278, 396, 435, 641, 577, 122, 294 357, 802 730, 286, 484, 169,, 559, 208, 498 Find the median, mode, variance, range, mad, upper extreme, lower extreme. Draw a box plot to represent these incomes. Calculate the mean weekly income and the standard deviation. (HANDWRITTEN OR AT LEAST NOT IN A CODE FORM)
Calculate the following data: 1,14,12,10,15,8 Calculate the value of the sample standard deviation. Round your answer to one decimal place.
A developmental psychologist is interested in studying how long babies gaze at a photograph of a human face. To test this question, she shows a picture to a sample of six babies and records the length of their gaze in seconds. The data are as follows: 12, 17, 18, 20, 20, 29. Calculate the mean, median, mode, range, variance and standard deviation for the sample.
A company conducted a survey to determine the average age of its employees. The ages of 10 randomly selected employees are as follows: 25, 28, 30, 35, 40, 42, 45, 48, 50, and 55. Calculate the sample mean, sample variance, and standard deviation of the ages.
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Give the formula for sample mean.
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(b) Disk drive substrates may affect the amplitude of the signal obtained during readback. A manufacturer compares four substrates: aluminum (A), nickel- plated aluminum (B), and two types of glass (C and D). Sixteen disk drives will be made, four using each of the substrates. It is felt that operator, machine, and day of production may have an effect on the drives, so these three effects were blocked. The design and responses (in microvolts ×10–2) are given in the Table Q2(b) (data from Nelson 1993, Greek letters indicate day): Table Q2(b) Operator 3 Machine 1 4 Cy = 11 Aß = 5 B8 = 9 BB = 8 Dy = 4 Ca = 9 1 Αα8 D8 = 2 Cô = 7 DB = 3 By = 4 2 Βα=2 Ay = 7 CB = 9 3 4 Da = 5 Að = 3 Construct an ANOVA table from this experiment at a 0.05 level of significance. Identify whether the four substrates really have an effect on the drives.
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