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1. Find the area under the standard normal curve that lies between z = -2.4 and z= 1
2. Provide an appropriate response. Assume that the variable under consideration has a density curve. The area under the density curve that lies between 30 and 50 is 0.465. What percentage of all possible observations of the variable are either less than 30 or greater than 50?
x is a normally distributed random variable with mean 10 and varinace 24.a find pxgt14b find p8ltxlt20c find the
a manufacturer of light bulbs advertises that on average its long-life bulb will last more than 5000 hours. to test the
you preform an anova on eighteen subjects divided evenly into three groups according to age. reading speed is measured
a die is loaded and a 6 comes up with probability 1?4. if the die is tossed twelve times find the probability thata the
Assume duration of human pregnancies follow mound-shaped distribution with mean of 266 days and the standard deviation of 16 days.
A farm brings 15 tons of watermelon to market. Find a 90% confidence interval for the population mean cash value of this crop. What is the margin of error?
Determine the probability of choosing at random license plate which ends in the even number?
according to some research males have better spatial skills than do females and according to other research females
as reported by a source for statistics the mean serum high density of females 20-29 years old is 53. if serum
The standard deviation equaled five days. Assuming that the distribution is normal, what percent of the invoices were paid within 15 days of receipt?
assume we want to use a .05 significance level to test the claim that p1ltp2. it we want to test that claim by using a
The sampling plan is perhaps the single most important aspect of generalizing research findings beyond the study sample. In a quantitative research study, what method of sampling allows for the greater generalization of findings?
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