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Of the 400 respondents in the Christmas tree market survey, 43% had no children at home and 57% had at least one child at home. Corresponding figures for most recent census are 48% with no children and 52% with at least one child. Test null hypothesis that telephone survey technique has the probability of selecting the household with no children which is equal to value obtained by census. Give z statistic (rounded to two decimal places) and P-value. What do you conclude? (Use = 0.10.).
Create a scenario where the binomial probability formula could be used to determine the probability of some number of successes, x, in some given number of trials,n.
Frequently, tests that yield abnormal results are repeated for confirmation. What is the probability that for a normal person a test will be at least 1.5 times as high as the upper limit of normal on two separate occasions?
Suppose that 50 identical batteries are being tested. After 8 hours of continuous use, assume that a given battery is still operating with a probability of 0.70 and has failed with a probability of 0.30.
Show all the steps of your hypothesis test including a) the claim being tested , b) the null and alternative hypothesis, c) the test statistic, d) the p value, e) initial conclusion, and f) a final conclusion about the original claim.
The Globe Fishery packs shrimp that weigh more than 1.91 ounces each in packages marked" large" and shrimp that weigh less than 0.47 ounces each into packages marked "small"; the remainder are packed in "medium" size packages.
A random sample of stipends of teaching assistants in economics is listed below. Is there sufficient evidence at the alpha=.05 level to conclude that the average stipend different from $15,000? The data is listed below:
Using Non-parametric test, whether there is significant difference in the motor coordination skills.
If an apartment is selected at random, what is the probability that it is not a 2 bedroom apartment on the 2nd floor?
Between what two values does the P -value of this test fall?
The lower limit for a 95% confidence interval for the population proportion if a sample of size 200 had a 40 success is.
Compute the skewness for your data set using Pearson's
Describe the population of interest and calculate the numerical value of the statistic that that the EPA will use to estimate p. Construct a 95% confidence interval for the proportion of Americans who live in neighborhoods with acceptable levels of ..
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