Decision regarding observed and expected frequencies

Assignment Help Basic Statistics
Reference no: EM1319530

Q1) 3 different fertilizers were applied to field of celery. In calculating F, how many  degrees of freedom are there in the numerator?

 

Q2) The electronics company wishes to compare quality of their cell phones to cell phones from 3 competitors. They sample 10 phones from each company and count number of defects for each phone. If ANOVA were utilized to compare average number of defects, treatments would be defined as:

 

Q3) If correlation between two independent variables of regression analysis is 0.11 and each independent variable is highly correlated to dependent variable, what does this point to?

 

Q4) Assume a package delivery company purchased 14 trucks at same time. 5 trucks were bought from manufacturer A, four from B and five from manufacturer C. Cost of maintaining each truck was recorded. Company used ANOVA to test if mean maintenance cost of trucks from each manufacturer were equal. To apply F test, how many degrees of freedom are in denominator?

 

Q5) Mean length of = small counter balance bar is 43 millimetres. There is concern that the adjustments of machine producing bars have changed. Test claim at the 0.02 level that there has been no change in mean length. Alternate hypothesis is that there has been change. 12 bars (n = 12) were selected at random and their lengths recorded. The lengths are (in millimetres) 42, 39, 42, 45, 43, 40, 39, 41, 40, 42, 43 and 42. Mean of the sample is 41.5 and standard deviation 1.784. Computed t = - 2.913.  Has there been statistically significant change in mean length of the bars?

 

Q6) What is our decision regarding differences between observed and expected frequencies if critical value of chi-square is 9.488 and computed value is 6.079.

Reference no: EM1319530

Questions Cloud

Difference in proportion using level of significance : Using 5% level of significance, is there any difference in proportion of guests who would select the two resorts? What is your conclusion?
Explanation of translation methodology used by coca-cola : Which translation methodology or methodologies does Coca-Cola use? What information provided helped you draw a conclusion (if you did draw a conclusion)? Explain how Coca-Cola could use the translation methodology that it does and still have excha..
Fruit-picking can be done by children or adults : Assume to fruit-picking can be done by children or adults, but to adults are twice as efficient as children
Probability through discrete probability distribution : What is the probability of flipping a coin 6 times and getting 4 or more heads?
Decision regarding observed and expected frequencies : What is our decision regarding differences between observed and expected frequencies if critical value of chi-square is 9.488 and computed value is 6.079.
Case study of danforth corporation : The Danforth corporation circuit production plant has a 12,000 unit capacity and currently produces 10,000 circuits per year.
Probability through poisson distribution : Determine the probability that between 5 and 10 minutes will pass between successive occurrences.
Data-communication system : A data-communication system operates at the 28.8 kb/s (typical of the current high-speed telephone modems).
Elucidate how a societys social values influence : Converse Elucidate how a society's social values influence the provision of also payment for health services.

Reviews

Write a Review

 

Basic Statistics Questions & Answers

  Determining the frequencies and p-value

2 to every even-numbered card, with aces being 1s. Determine the frequencies of 0, 1, and 2. Use SPSS to get the value of test statistic and p-value.

  The explanatory variable which is a measure of neighborhood

The explanatory variable which is a measure of neighborhood socio-economic status variable RFM. Response variable is percent (%) of bicycle riders that wears a helmet.

  Estimate marginal-conditional probabilities

Employees of a local university have been classified according to gender and job type. The following table provides data about the employees.

  To find the 95 percent confidence interval for mean

A small New England college has a total of 400 students.The Math SAT is required for admission, and the mean score of all 400 students is 620. The population standard deviation is found to be 60. The formula for a 95% confidence interval yields th..

  The probability that a sheet selected at random

The population of lengths of aluminium-coated steel sheets is normally distributed with a mean of 30.05 inches and a standard deviation of 0.2 inches.

  Determining the probability using poisson distribution

Number of rescue calls received by rescue squad in city follows a Poisson distribution with mu = 2.83 per day. Squad can handle at most four calls a day. Determine the probability that squad will be able to handle all calls on a particular day?

  Find the value of z-score- standard normal distribution

Find the value of Z-score- standard normal distribution.Find out a value of the standard normal random variable z, call it z0.

  Test of goodness of fit-chi square

Would it be reasonable to conclude that the population distribution is Poisson with a mean of 2.0?

  Creating confidence interval for mean overall duration

Create a 99% confidence interval for mean overall duration of symptoms in population of individuals who used zinc lozenges.

  Different types of sampling methods

Identify the type of sampling (random, systematic, convenience, stratified, cluster) used when a sample of people who smoke is obtained as described below.

  Twotail test to claim average cottage cheese consumption

Which of following statements would be right concerning a twotail test at 0.05 level of significance? We can conclude that average cottage cheese consumption in America is at least 0.705 pound more or less than 2.75 pounds per person per year.

  Mean number of shoes sold at mall using significance level

At.02 significance level is it sensible to conclude that mean number of shoes sold at mall stores is larger than at outlet stores?

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