What is the probability that the sample mean

Assignment Help Applied Statistics

Reference no: EM13901168

1. Suppose we want to estimate the mean BMI for women in pregnancy at 20 weeks gestation. If we have a sample of 100 women and measure their BMI at 20 weeks gestation, what is the probability that the sample mean is within 1 unit of the true BMI if the standard deviation in BMI is taken to be 3.6?

2. An experimental drug has been shown to be 75% effective in eliminating symptoms of allergies in animal studies. A small human study involving 6 participants is conducted. What is the probability that the drug is effective on more than half of the participants?

3. In a study of women and preterm delivery, suppose BMI at 16 weeks gestation has a mean 28.5 with a standard deviation of 3.6 and BMI is assumed to follow a normal distribution. Find thefollowing:

a. The proportion of women with BMI> 30.

b. The proportion of women with BMI>40.

c. The BMI that separates the top 10% from the rest.

4. A study is conducted to compare an experimental medication for migraine headaches to a currently available medication. A total of 50 patients are enrolled in the study and each patientreceives both treatments. Each participant is asked if the assigned medication causes anystomach upset. Among the 50 participants, 12 report stomach upset with the experimentalmedication. Construct a 90% confidence interval for the proportion of participants who might experience stomach upset with the experimental medication.

5) A 95% confidence interval for the mean diastolic blood pressure in women is 62 to 110. What isthe margin of error?

6. Recent recommendations suggest 60 minutes of physical activity per day. A sample of 50 adultsin a study of cardiovascular risk factors report exercising a mean of 38 minutes per day with astandard deviation of 19 minutes. Based on the sample data, is the physical activity significantlyless than recommended? Run the appropriate test at a 1% level of significance

Reference no: EM13901168

Questions Cloud

Prepare a cost of goods sold statement for last year : Prepare a cost of goods sold statement for last year. Prepare an income statement for last year. Show the percentage of sales that each line item represents.

What is the prime cost per unit and conversion cost per unit : Of the unit manufacturing cost calculated in Requirement 2, $3.20 is direct materials and $9.80 is overhead. What is the prime cost per unit? Conversion cost per unit?

Which costs in the value chain would be considered : Which costs in the value chain would be considered by each of the following managers in their decision regarding Glaxane?

A manufacturer of potato chips : A manufacturer of potato chips would like to know whether its bag filling machine works properly at the 409 gram setting. It is believed the machine is underfilling the bags. A 35 gram bag sample had a mean of 404 grams. A level of significance of 0...

What is the probability that the sample mean : 1. Suppose we want to estimate the mean BMI for women in pregnancy at 20 weeks gestation. If we have a sample of 100 women and measure their BMI at 20 weeks gestation, what is the probability that the sample mean is within 1 unit of the true BMI if t..

Gasoline prices have been falling for about twelve months : Gasoline prices have been falling for about twelve months. Because of this, the state transportation department wants to determine whether or not the mileage driven by motorists has increased from the historical average of 250 miles per week. A sam..

What was the cost of materials used for packaging : What was the cost of materials used for packaging and mailing services during May? What was the prime cost for May? What was the conversion cost for May?

Given that the random variable x is normally distributed : Given that the random variable X is normally distributed with a mean of 80 and a standard deviation of 10, P(85

Assembling and inspecting only deluxe phones (x2) : Based on this table, how much profit can be made by assembling and inspecting only deluxe phones (X2)?

User Account

All Pages