Hypothesis test of road, An official of the Iowa department

Hypothesis test of road

Reference no: EM13113454

An official of the Iowa department of Highways wants to compare the useful life, in months, of two brands of paint used for striping roads. The mean number of months Cooper Paint lasted was 36.2, with a standard deviation of 1.14 months. The official reviewed 35 road stripes. For king Paint, the mean number of months was 37.0, with standard deviation of 1.3 months. The official reviewed 40 road stripes. At 0.01 significance level, is there a difference in the useful life of the two paints?

Reference no: EM13113454

Questions Cloud

How many milimoles of base must be added : You have 50 mL of 0.010 fully protonated histidine. how many milimoles of base must be added to bring histidine solution to pH equivalent to the pI of histidine.

Inferences based on sample : A powerful women's group has claimed that men and women differ in attitudes about sexual discrimination. A group of 50 men (group 1) and 40 women (group 2) were asked if they thought sexual discrimination is a problem in the United States.

Determining the proportion of public elementary : A researcher is interested in determining the proportion of public elementary schools that have a mandatory school uniform policy. The researcher randomly sampled n=400 public elementary schools and found that 100 of the schools have a mandatory s..

How high (in meters) can the person climb : 43 kg person drinks 410. g of milk, which has a "caloric" value of approximately 3.0 kJ/g. If only 18% of the energy in milk is converted to mechanical work.

Hypothesis test of road : An official of the Iowa department of Highways wants to compare the useful life, in months, of two brands of paint used for striping roads. The mean number of months Cooper Paint lasted was 36.2

Hyopthesis testing of boats : A board of directors at the Anchor Pointe Marina is studying the usage of boats among its members. A sample of 30 members who have bots 10 to 20 feet in length showed that they used their boats an average of 11 days last July.

What is the probability that the wait for the second student : What is the probability that the wait for the second student will be 15 minutes or less (to 4 decimals)? What is the probability that the wait for the second student will be between 15 and 45 minutes (to 4 decimals)?

What is the molarity of the agno3 solution : We add excess Na2CrO4 solution to 17.0 mL of a solution of silver nitrate (AgNO3) to form insoluble solid Ag2CrO4. When it has been dried and weighed, the mass of Ag2CrO4 is found to be 0.310 grams.

Hypothesis test of artificial fingernails : Your director has banned the use of all artificial fingernails, claiming their use contributes to patient infections in the unit. After multiple discussions the director has allowed you to do a research study to determine if the use of artificial ..

User Account

All Pages