Calculate the mean and the standard deviation

Assignment Help Basic Statistics
Reference no: EM13948049

Q1. For the set of numbers given: 9, 8, 7, 27, 16, 3, 1, 9, 4 and 16

determine:
(a) the mean (b) the median (c) the mode
(d) the variance from the mean and from it calculate the standard deviation.

All calculations must be shown for (a), (b) and (c) and a hand drawn table consisting of manipulated data elements and calculations to produce the answer for (d).

Q2. A machine produces rods with a nominal diameter of 10 mm. The distribution of a sample of 150 rods is given below. The diameters are correct to 0.01 mm

diameter (mm) 9.76- 9.82- 9.88- 9.94- 10.00- 10.06- 10.12-
9.81 9.87 9.93 9.99 10.05 10.11 10.17
No. of rods 1 22 30 45 34 16 2

(a) Calculate the mean and the standard deviation. You will find it convenient to copy the above results into a table and do your work in a tabular form.

(b) When the machine is functioning correctly the company expects a mean of 10.00 mm and a standard deviation of 0.05 mm. The machine is overhauled when the variability (i.e. the SD) deviates from the norm by 50% or more. What do your results suggest to the company?

Reference no: EM13948049

You have asked to research the high absenteeism rate in your

You have asked to research the high absenteeism rate in your company. One required analysis is to be by gender. Assume you have been asked to do the study via a survey.

Distribution of scores in sample-identify data skewed or not

A record executive is interested in the popularity of her label's newest band, The Standard Deviations. She asks 10 people how many Standard Deviations songs they know.

Calculation of location of significant difference in groups

The question related to Basic Statistics and it discusses about two multiple choice questions. The first question is about calculation of location of significant difference

Find probability that the sprinkler system will come on

The probability that D1 operates correctly is 0.95 and the probability that D2 operates correctly is 0.92. Find the probability that the sprinkler system will come on.

R charts and quality

The following are quality control data for a manufacturing process at Kensport Chemical Company. The data show the temperature in degrees centigrade at five point in time du

The proportion of vehicles with only one occupant

Carry out a survey to estimate a proportion in a population of your choice. Examples include the proportion of vehicles with only one occupant and the proportion of a univer

When we have several criteria with different scale for rank

When we have several criteria with different scale, for ranking can we add values after standardization? for exaample for ranking websites we have number of visitors and page

Probability of making diagnosis of gonorrhea

Only two doctors would make a diagnosis on patients coming into the same STD clinic for gonorrhea. The probability of the two doctors making a diagnosis of gonorrh

Reviews

Write a Review

 
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd