88 Speed Mart Sdn Bhd collects a sample of 100 sales receipts of its branchesin December 2020 which is shown in Table 3:Table 3: Sales of 88 Speed Mart in December 2020Sales (RM'000)0 to less than 1010 to less than 2020 to less than 3030 to less than 4040 to less than 50Frequency (f)1327222810(i)Compute the mean and the standard deviation of the sales.(ii)The mean and standard deviation for the sales of 88 Speed Mart Sdn.Bhd. in November 2020 were RM 30,000 and RM 15,000, respectively.Based on your finding in (i), compare the consistency of the sales forthe two months.

CI mid-value (x) f 0-10 5 13 10-20 15 27 20-30 25 22 30-40 35 28 40-50 45 10 Sum 100…

Answered: (a) 88 Speed Mart Sdn Bhd collects a…

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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29) The pregnancy length in days for a population of new mothers can be approximated by a normal distribution with a mean of 267 days and a standard deviation of 10 days. (a) What is the minimum pregnancy length that can be in the top 88% of pregnancy lengths? (b) What is the maximum pregnancy length that can be in the bottom 77% of pregnancy lengths (a) The minimum pregnancy length is days. (Round to one decimal place as needed.) (b) The maximum pregnancy length is days. (Round to one decimal place as needed.)
The pregnancy length in days for a population of new mothers can be approximated by a normal distribution with a mean of 268 days and a standard deviation of 11 days. (a) What is the minimum pregnancy length that can be in the top 8% of pregnancy lengths? (b) What is the maximum pregnancy length that can be in the bottom 5% of pregnancy lengths?
The pregnancy length in days for a population of new mothers can be approximated by a normal distribution with a mean of 266 days and a standard deviation of 8 days. (a) What is the minimum pregnancy length that can be in the top 10%of pregnancy lengths? (b) What is the maximum pregnancy length that can be in the bottom 3% of pregnancy lengths?
The pregnancy length in days for a population of new mothers can be approximated by a normal distribution with a mean of 266 days and a standard deviation of 11 days. (a) What is the minimum pregnancy length that can be in the top 9% of pregnancy lengths? (b) What is the maximum pregnancy length that can be in the bottom 5% of pregnancy lengths?
The pregnancy length in days for a population of new mothers can be approximated by a normal distribution with a mean of 270 days and a standard deviation of 12 days.(a) What is the minimum pregnancy length that can be in the top 8% of pregnancy lengths? (b) What is the maximum pregnancy length that can be in the bottom 4% of pregnancy lengths?
You may need to use the appropriate appendix table or technology to answer this question. A random sample of 121 checking accounts at a bank showed an average daily balance of $290. The standard deviation of the population is known to be $77. (a) Is it necessary to know anything about the shape of the distribution of the account balances in order to make an interval estimate of the mean of all the account balances? Explain. No, the sample is large and the standard deviation of the population is known so we do not need to know anything about the shape of the distribution. Yes, the mean is larger than the standard deviation so we also need to know that the shape of the distribution is at least approximately bell shaped. No, the standard deviation is larger than the mean so we do not need to know anything about the shape of the distribution. No, the mean is larger than the standard deviation so we do not need to know anything about the shape of the distribution. Yes, the sample is large…
Suppose that a committee is studying whether or not there is waste of time in our judicial system. It is interested in the mean amount of time individuals waste at the courthouse waiting to be called for jury duty. The committee randomly surveyed 81 people who recently served as jurors. The sample mean wait time was eight hours with a sample standard deviation of two hours. a) (i) Enter an exact number as an integer, fraction, or decimal. x = hrs (ii) Enter an exact number as an integer, fraction, or decimal. sx = hrs (iii) Enter an exact number as an integer, fraction, or decimal. n = (iv) Enter an exact number as an integer, fraction, or decimal. n − 1 = b)Which distribution should you use for this problem? (Enter your answer in the form z or tdf where df is the degrees of freedom.)
suppose that IQ scores and one region are normally distributed with a standard deviation of 16. Suppose also that exactly 55% of the individuals from this region have IQ scores of greater than 100 ( and at 45% do not ). What is the main IQ score for this region carrier intermediate confusions to at least four decimal places around your answer to at least one decimal place.
The pregnancy length in days for a population of new mothers can be approximated by a normal distribution with a mean of 269 days and a standard deviation of 10 days. (a) What is the minimum pregnancy length that can be in the top 9% of pregnancy lengths? (b) What is the maximum pregnancy length that can be in the bottom 5% of pregnancy lengths?
Based on article published in toronto, the total response time (the time it takes gefore the fire fighter shows up for a fire station is given below 4, 8, 10, 5 ,6, 4, 12, 15, 16 ,7 ,6 (a)What is the mean response time. sum(x) = N= mean = (b) What is the standard deviation for the response time sum(x**2)= (sum(x))**2 = standard deviation = (c) use the calculated sample mean and starndard deviation . What is the probability that the response would bre more than 12 mins (round your answer to four decimal places) (d) use the calculated sample and standard deviation , what is the probability that the response time would be more than 6 mins ? (round your answera to 4 decimal places)
A recent study of 1,215 randomly selected middle school students revealed that the average number of minutes they spent completing homework during the school week was 180 minutes with a standard deviation of 45 minutes. Which of the following is the standard error, in minutes, of the sampling distribution of the mean number of minutes spent on homework per week for all middle school students? (45)(55)1,215−−−−−−√(45)(55)1,215 A 451,215451,215 B 451,215−−−−√451,215 C 451,215√451,215 D 1.96(451,215√) E

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