in what ways is the t distribution similar to the standard normal distribution

1. describe the following terms and give an example of each: a) F distribution, b) F statistic, c) chi-square distribution, d) t distribution, e) dependent samples, f) independent samples, g) degrees of freedom, h) t statistic, i) pared difference 2. in what ways is the t distribution similar to the standard normal distribution? in what […]

The U.S. Department of Agriculture reports that the mean cost of raising a child from birth to age 2… 1 answer below »

The U.S. Department of Agriculture reports that the mean cost of raising a child from birth to age 2 in a rural area is $9405. You believe this value is incorrect, so you select a random sample of 900 children (age 2) and find that the mean cost is $9290 with a standard deviation of […]

Our environment is very sensitive to the amount of ozone in the upper atmosphere 1 answer below »

Our environment is very sensitive to the amount of ozone in the upper atmosphere. The level of ozone normally found is 4.2 parts/million (ppm). A researcher believes that the current ozone level is at an insufficient level. The mean of 890 samples is 4.1ppm. Assume the standard deviation is known to be 1.1ppm. Does the […]

Last fall, a sample of n=25 freshmen was selected to participate in a new 4-hour training program… 1 answer below »

Last fall, a sample of n=25 freshmen was selected to participate in a new 4-hour training program designed to improve study skills. To evaluate the effectiveness of the new program, the sample was compared with the rest of the freshman class. All freshmen must take the same English Language Skills course, and the mean score […]

The herbal supplement ginkgo biloba is advertised as producing an increase in physical strength and… 1 answer below »

14. The herbal supplement ginkgo biloba is advertised as producing an increase in physical strength and stamina. To test this claim, a sample of n=36 adults is obtained and each person is instructed to take the regular dose of the herb for a period of 30days. At the end of the 30-day period, each person […]

In own words explain the difference between a point estimate and an interval estimate of a parameter

1. In own words explain the difference between a point estimate and an interval estimate of a parameter? Which is better? Why? 2. What information is necessary to calculate a confidence interval? Is the size of the population relevant when one is determining the sample size for a confidence interval? What is necessary to determine […]

The Myers Summer Casual Furniture Store tells customers that a special order will take six weeks (42… 1 answer below »

The Myers Summer Casual Furniture Store tells customers that a special order will take six weeks (42 days). During recent months the owner has received several complaints that the special orders are taking longer than 42 days. A sample of 12 special orders delivered in the last month showed that the mean waiting time was […]

The research department at the home office of New Hampshire Insurance conducts ongoing research on… 1 answer below »

The research department at the home office of New Hampshire Insurance conducts ongoing research on the causes of automobile accidents, the characteristics of the drivers, and so on. A random sample of 400 policies written on single persons revealed 120 had at least one accident in the previous three-year period. Similarly, a sample of 600 […]