Standard deviations below and above the mean

Assignment Help Basic Statistics
Reference no: EM1397994

According to the empirical rule, if the data from a "bell-shaped" normal distribution ______ percent of the observation will be contained between 2 standard deviations below the mean and 2 standard deviations above the mean.

a) 68.26

b) 88.89

c) 93.75

d) 95.44

Reference no: EM1397994

Questions Cloud

Write list of activities and optimistic completion time : List of activities and their optimistic completion time, most probable completion time, and pessimistic completion time (all in days) for new contract are given in given table.
Simultaneous responses to two categorical questions : When studying the simultaneous responses to two categorical questions, we should set up a:
Anova and students t test for diet data : Student volunteers in a weight loss project were randomly assigned to one of three diets. After 2 months on the diets, subjects were weighed and weight loss was recorded for each person.
Information about two way anova in spss : Time to help a stranger was investigated by a group of undergraduate psychology majors as a part of their Introduction to Research Methods course.
Standard deviations below and above the mean : According to the empirical rule, if the data from a "bell-shaped" normal distribution ______ percent of the observation will be contained between 2 standard deviations below the mean and 2 standard deviations above the mean.
Mean fuel expense of the three manufacturers : ABC Trucking Company purchased 15 trucks at the same time to start their business. 5 Trucks were purchased from Peterbilt, 5 from Freightliner, and 5 from Kenworth.
Excessive regulation of workplace safety hurts productivity : Opponents of "Big Government" claim that excessive regulation of workplace safety hurts productivity and increases costs.
Perfectly symmmetrical distribution : In a perfectly symmmetrical distribution: a) the range equals the interquartile range b) the interquartile range equals the mean c) the median equals the mean d) the variance equals the standard deviation
Testing of homogeneity of variance : Using an alpha of .05, what can you conclude about homogeneity of variance from the output? Word process your responses on the SPSS output pages.

Reviews

Write a Review

Basic Statistics Questions & Answers

  Find out the probability of an event relies on past history

Find out the probability of an event relies on past history of record data. The relative frequency method of computing the probability of an event relies on past history.

  Comparison of paired and unpaired samples test

Comparison of paired and unpaired samples test - Identify which of the two tests (Independent samples and Paired samples) test is the preferred test and justify your choice.

  Linear regression relationship analysis

Ten students in a graduate program were randomly selected. Their grade point averages (GPAs) when they entered the program were between 3.5 and 4.0.

  Calculate the sample standard deviation for each method

Public transportation and the automobile are 2 methods an employee can use to get to work each day. Samples of times recorded for each method are shown. Times are in minutes.

  Determining confidence interval for mean growth rate

Bougainvilleas, mean growth rate was 2.23 inches/week and sample standard deviation was 0.77 inches/week. Determine a 90% confidence interval for mean growth rate of all Bougainvilleas.

  Experiment designed to measure the relationship

The administration of Midwest State University wants to know if arrangement of chairs affects student participation in classrooms. What would be a good operational definition of the dependent variable in an experiment designed to measure this rela..

  Question on types of sampling

Categorize as simple, random, sample, stratified/systematic sample, cluster/convenience sample. List discharged hotel customers, divide them day their length of stay, and draw simple random samples from each group.

  Shape of the distribution in national average sat score

The national average SAT score (for Verbal and Math) is 1028. Suppose that nothing is known about the shape of the distribution and that the standard deviation is 100. If a random sample of 200 scores were selected and the sample mean were calcula..

  Association between mortality from cirrhosis

Perform a significance test to assess whether there is an association between mortality from cirrhosis of the liver and duration of employment in the group hired after 1945. Report a p- value.

  Safety stock-reorder point

Lead-time demand is 600 pounds. The standard deviation of lead time demand is 52 pounds. Supposing the lead time demand is normally distributed and that an acceptable risk of stocking out is 4%:

  Level of confidence and an estimated standard deviation

What is their maximum error of the estimated mean quality for a 92% level of confidence and an estimated standard deviation of 8?

  Population mean waiting time

At the 0.05 level of significance, is there evidence to suggest that the population mean waiting time to check out is less than 10.73 minutes?

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