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In the population, the average IQ is 100. A team of experimenters wants to test a new pill to see if it either has a positive or negative effect on intelligence, or not effect at all. A sample of 30 participants who have taken the pill has a mean of 140 with a standard deviation of 20. Did the pill affect intelligence? Lets say a= 0.05
Question: Identify the independent and dependent variables and at least one potentially confounding variable. State how the confounding variable(s) might be controlled.
if the mean per capita income in the u.s. is 39000 and the standard deviation is 5000. what percent of the
let fxx 0 if xgt2 or 121-x2 if xlt2 be the density function of a random variable x. find the characteristic function
Using a level of significance of .10, is there evidence that the dual degree students are receiving lower grades? Fully explain your answer.
A medical school claims that more than 28% of its students plan to go into general practice. It is found that among a random smaple of 130 of the school's students, 32% of them plan to go into general practice. Find the P-value for a test of the s..
A contractor is considering a sale that promises a profit of $31,000 with a probability of 0.7 or a loss (due to bad weather, strikes, and such) of $13,000 with a probability of 0.3. What is the expected profit?
a sample space s consists of five simple events with these probabilitiespe1 pe2 .15 pe3 .4 pe4 2pe5a find the
1. Cloud Seeding. What is the experimental unit in the cloud seeding experiment? 2. Cloud Seeding. Randomization in the cloud seeding experiment was crucial in assessing the effect of cloud seeding on rainfall. Why?
Create a side by side bar chart to compare the numbers of items of each type made in California and New York.
what is the chance the average contents of the cans will be less than advertised and what will be the standard deviation of the number of men who help at home, based on the first survey
Is there a relationship between systolic blood pressure and how long the Sherpas have lived in their new environment, the Kathmandu valley, after accounting for anthropometric differences? Does this effect vary by age?
Suppose that the data in Table represent approximate distribution of blood type frequency in percentage of total population.
recently the management team at wilson noticed that there were differences in output levels across the various plants.
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