15. An Incomplete distribution is given below:Variable :10-2020-3030-4040-5050-6060-7070-80Frequency :1230?652518Given that the Median value is 46 and N = 229(a) Using the median formula fill up the missing frequencies.(b) Calculate the Arithmatic mean of the completed table.

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Answered: 15. An Incomplete distribution is given…

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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Cigarette Smoking A researcher found that a cigarette smoker smokes on average 30 cigarettes a day. She feels that this average is too low. She selected a random sample of 9 smokers and found that the mean number of cigarettes they smoked per day was 32 . The sample standard deviation was 2.4. At α=0.10, is there enough evidence to support her claim? Assume that the population is approximately normally distributed. Use the critical value method and tables. (a)State the hypotheses and identify the claim. H0: claim/ do not claimH1: claim/do not claim This hypothesis test one tailed/two tailed a (Choose one) test. (b)Find the critical value. Round the answer to at least two decimal places. Critical value is c)Compute the test value. Round the sample standard deviation and score value to at least two decimal places as needed. F= P= (d)Make the decision. Reject/ do not reject (Choose one) the null hypothesis (e)Summarize the results. There ▼(Choose one) enough evidence to support…
(b) In the following frequency distribution of marks, one of the frequency is missing if the arithmetic mean of the distribution is 52 find the missing frequency. Marks 0–20 20-40 40–60 60–80 80–100 No. of students 8 19 14 9.
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