What are the hypotheses needed to test the clain of the

Assignment Help Basic Statistics

Reference no: EM13632620

In a research report on the effect of moisture on a certain kind of composite material, it is reported that in 80% of cases the effect is minimal, in 15% of cases the effect is strong and in the remaining 5% of cases the effect is severe. An experiment tested these clains by subjecting 800 samples of the composite material to moisture.

a) What are the hypotheses needed to test the clain of the report?

b) The results from the sample given below. Complete the expected counts for the hypothesis test.

Effect

Minimal

Strong

Severe

Observed Counts

619

124

Expected

c) Calculate the test statistic.

d) What are the degrees of freedom for this test? DF=

e) The experimenter reported a p-value=0.01789. What can you conclude?

Reference no: EM13632620

Questions Cloud

The coack takes a random sample of 43 players and finds the : a basketball coach wants to know how many free throws an nba playrs shoot during the course of an advantage pratice.

According to a study by the american pet food dealers : according to a study by the american pet food dealers association 63 percent of u.s. households own pets. a report is

Suppose you have a sample of 6 observations from a normal : suppose you have a sample of 6 observations from a normal population. the sample variance is equal to 4. find a 90

Which of the following is not an assumption needed for : which of the following is not an assumption needed for one-way analysis of variance?a random selection of samples frome

What are the hypotheses needed to test the clain of the : in a research report on the effect of moisture on a certain kind of composite material it is reported that in 80 of

A previous study found a standard deviation of four hours : a medical devices company wants to know the number of hours their mri machines are used per day. a previous study found

Find the probability a randomly selected person has an iq : 1.find the probability a randomly selected person has an iq greater than 130.probability statement draw a picture2. use

The percentage of values in some commonly used intervals : the percentage of values in some commonly used intervals area 68.3 of the values of a normal random variable are within

A professor measures the time x that students take to : a professor measures the time x that students take to complete an examination and the score y that the students

User Account

All Pages