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Question: A number of post-1983 pennies and post-1964 quarters were weighed. Here is a summary of the results:
Pennies n= 37; Xbar= 2.499g; s=.01648g
Quarters n=40; Xbar= 5.639g; s= .06194g
Do the pennies and quarters have the same amount of variation?
Please show steps and explain.
A survey researcher compares 4 religious groups on their attitudes toward education. 1200 subjects receive the survey and 823 respond. There are 10 items; the likert scale is 1-5. A high positive score indicates a more positive attitude.
Determine the proportion of homes that have a pool. At the .05 significance level, can we conclude that less than 40 percent of the homes sold in the Denver area had a pool? What is the p-value?
There are 72 data values altogether. The degrees of freedom for the Between(dfB) and the degrees of freedom for the With-in (dfW) are?
A random sample of 40 part time workers has a mean annual earnings of $3120 and a population standard deviation of $677. Compute the 95% confidence interval for the mean.
question letnbspomega be a space of results and b one happening such that probability of b gt 0 pb gt 0. prove that
Significance level to test the claim that less than half (.5) of all executives identify that error as being the most common job interviewing error.
what is the probability that on 10 true of false questions 4 will be correct and 6 incorrect out of plain
Auntie Pam's Home Made Wild Grape Jelly has been a great hit through online sales. She has recently expanded her small factory and acquired a new filler machine to accommodate the increased demand, especially for the 12 ounce jar, which is the mos..
The lengths of human pregnancies are normally distributed with a mean of 268 days and a standard deviation of 15 days. What is the probability that a pregnancy lasts at least 300 days?
Test at the 5% level of significance whether the true mean time it takes for luggage to reach the travelers is less than 17 minutes. Determine the null hypothesis.
what is the probability of tossing a coin 5 times and getting all
question a recent study indicated that 29 of 100 women over age 55 in the study were widows.a how large a sample
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