Determining expected frequencies for chi-square test

Assignment Help Basic Statistics

Reference no: EM1319192

Q1) College is planning to add food vendor in student union and would like to know what kind of food service students would prefer. Sample of 120 students is got and each student is asked to choose his/her preference from coffee shop, a pizza place, or a hamburger grill. Resulting frequency data are shown in the table below.

Coffee	Pizza	Hamburger
53	37	30

a) Do data point to any significant preferences among three kinds of food service? Test at the .05 level of significance.

i) Yes, there are significant preferences

ii) no; there are no significant preferences

b) Similar survey of student population 10 years ago found that coffee shop was favoured by 20% of students, and pizza and hamburger were each preferred by 40% of the students. Determine the expected frequencies for chi-square test.

Coffee --------

Pizza --------

Hamburger---------

Do data indicate a significant change in preferences in the past 10 years?

i) Yes, there has been = significant change in preferences

ii) no, there hasn't been any change in the population proportions

Reference no: EM1319192

Questions Cloud

Find the solution of the problem : Find the solution of the problem

American culture relationships and nature : Discussion question: What do you think has led many in our American culture to become separated from close relationships with nature?

Assuming that the amount spent follows a normal distribution : Construct a 95% confidence interval for the average amount its credit card customers spent on their first visit to the chain's new store in the mall assuming that the amount spent follows a normal distribution.

What happens to the value of the owners equity : Illustrate what happens to the value of the owners' equity in this bank. Elucidate how large a decline in the value of bank assets would it take to reduce this bank's capital to zero.

Determining expected frequencies for chi-square test : Similar survey of student population 10 years ago found that coffee shop was favoured by 20% of students, and pizza and hamburger were each preferred by 40% of the students. Determine the expected frequencies for chi-square test.

What is expected value of a two point shot : If the probability of making a two point shot is greater than the probability of making a three point shot, why do coaches allow some players to shoot the three point shot if they have the opportunity? Use expected value to explain your answer.

Find the missing number : Find the missing number

Time some internet trades such as grocery home : At the same time some internet trades such as grocery home deliveries have continually suffered steep losses regardless of scale.

Select the right sample size for a simple random sample : A random variable has a standard deviation of 16, and an unknown mean. Find the lowest size of a simple random sample so that the sample mean estimates the population mean with a standard error no larger than 0.25.

User Account

All Pages