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A new drug on the market is claimed by its manufacturers to reduce overweight women by 4.55 kg per month with standard deviation of 0.91 kg. Ten women chosen at random have reported losing an average of 4.05 kg within a month. Does this data support the claim of the manufacturer at 0.05 level of significance?
The mean number of births per minute in a country in a recent year was about nine. Find the probability that the
number of births in any given minute is (a) exactly six, (b) at least six, and (c) more than six.
The resistance of a uniform copper wire 50.0 meters long and 1.15 mm in
diameter is 0.830 ohms at
20° C. What is the resistivity of the copper at this temperature?
The average number of miligrams (mg) of cholesterol in a cup of a certain brand of ice cream is 660 mg, the standard deviation is 35 mg. Assume the variable is normally distributed.
A. If a cup of ice cream is selected, what is the probability that the cholesterol content will be more than 670 mg?
B. If a sample of 10 cups of ice cream is selected, what is the probability that the mean of the sample will be larger that 670 mg?
Consider a mixture of 2 mol of helium and 4 mol of oxygen. Compute the speed of sound in this gas mixture at 300 K
a) A three digit number is to be formed using the digits 1, 2, 3, 4, 5, 6 and no repetition is
allowed.
i) How many numbers can be formed if the leading digit is 4?
ii) How many numbers can be formed if the number is more than 250?
iii) How many odd numbers can be formed between 200 and 400?
b) Consider a bookshelf contains 28 books in different genre. 14 books are in education, 9
books in business and 5 books in motivation. A student would like to take 15 books. Find the number of ways if:
i) there is no restriction
ii) the choice must consist of 8 books in education, 5 books in business and 2 books in
motivation genre.
iii) The choice must consist of at least 9 books in education and exactly 5 books in
motivation genre.
the following set of lead determinations on seperate aliquots of a pooled blood serum were reported 103,106,107 and 114 meq/L.one value appears suspect.should the suspect be retained or discarded at 95% confidence level
angular velocity of the telescope as it orbits round the sun
For the most recent year available, the mean annual cost to attend a private university in the United States was $26,889. Assume the distribution of annual cost follows the normal distribution and the standard deviation $4,500. 95% of all students at private university pay less than what amount?
1. A population consists of six values (6, 9, 12, 15, 18, and 21). (35 points) a. Select a random sample of size 3. Explain the random sampling that you used. (3 pts.) b. How many possible samples can be drawn? (3 pls.)
c. list all possible samples and compute the mean of each sample. (10 pls.)
d. Construct a frequency distribution of the sample means obtained in step 2 including
f: P(x): P(): *P(): EP(x): Ex-P(F) and 2 P(F). (13 pts.)
e. Determine the mean, voriance and standard deviation of the sample mean. (6 pts.)
#339914 on Dec 2023