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A researcher has developed a new drug designed to reduce blood pressure. In an experiment, 21 subjects were assigned randomly to the treatment group, and received the new experimental drug. The other 23 subjects were assigned to the control group, and received a standard, well known treatment. After a suitable period of time, the reduction in blood pressure for each subject was recorded. A summary of these data is: Treatment n=21 xbar=23.48 s=8.01 Old Drug n=23 xbar=18.52 s=7.15 The researcher suspects that the new drug results in greater average reduction in blood pressure than the old drug does.
1.) The P-value for the test described in (again, using Option 2 for degrees of freedom) is:
A. larger than 0.05.
B. between 0.025 and 0.05.
C. between 0.04 and 0.05.
D. between 0.02 and 0.025.
a new muscle relaxant is available. researchers from the firm developing the relaxant have done studies that indicate
The useful life of an electrical component is exponentially distributed with a mean of 2500 hours. a. What is the probability the circuit will last more than 3,000 hours.
a researcher believe that college students spend a different amount of time talking on the phone than they do instant
Find the probability that the amount of total claims over a period of 100 days is at least $150,000. (Use the fact that the sum of independent normally distributed random variables is normally distributed, with mean equal to the sum of the individ..
The average value observed was 1.2 mg. If the sample variance is 0.04 mg, compute a 99% confidence interval for the mean nicotine content.
if i roll a fair die 1000 times find the probability the number of threes is strictly between 125 and 165 using excel
Prepare an analysis of how you developed your instrument. Be sure to describe how you chose your items, how you would norm this instrument.
M&M Milk Chocolate candies colors are not all the same proportion. Blue consist of 24% of the bag pieces while Brown & Red only 13% each. The following was found:
Assuming that the first digit cannot be a zero, compute the number of possible outcomes when the digits can be repeated.
explain the difference between a treatment group and control group. be specific and thorough a couple paragraphs should
Calculate a four-quarter weighted moving average for the number of America Online (AOL) subscribers for the nine quarters of data. The data are reported in thousands.
A researcher hypothesized that individuals who listen to classical music will score differently from the general population on a test of spatial ability. On a standardized test of spatial ability, u = 58. A random sample of 14 individuals wh..
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