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A national sample of 2728 adults, aged 18 and older, surveyed over the telephone (using bother landlines and cell phones) revealed that 66% reported that they had given "quite a lot" of thought to the upcoming elections. Is there any evidence that the percentage has changed from the reported benchmark of 58% during the same timeframe before the previous election?
a) what is the null hypothesis? Find the z-score of the observed proportion calculate the value of the test statistic. z =
b. What is the alternative hypothesis? Compare the z-score to the critical valye for a = 0.001 significance level using two sided alternative. Find the critical value z* = compare the z-score to the critical value
c) Explain the conclusion. Has it failed to reject or rejected the null? Is there sufficient
What is the probability that a randomly selected from such a hen weighs more than 11.5 grams. What is the probability that the average of a random sample of 25 eggs from such hens will be less than 5.8 grams?
Carry out an ANOVA and describe in detail in a BPS-formatted Results section:
Consider the following two columns that describe different types of data: A. Nominal 1. Qualitative B. Discrete 2. Quantitative C. Ordinal D. Continuous. The correctly paired groupings of the two columns is:
After testing whether social class and welfare spending were related, you derive a chi-square (obtained) of 17.64, with 6 degrees of freedom. If alpha is set at 0.01, what is your conclusion and interpretation?
the hit-and-miss manufacturing company produces items that have a probabilitypof being defective. these items are
what does it mean to say that your score on test one in statistics was in the 90th percentile?
Find out sample standard deviation (s) of scores Gordon Golfer made on his last four rounds (determine to the nearest one tenth, or .1).
If the net regression coefficients in the population are significantly different from zero, what can be included? No relationship exists between the dependent variable and any of the independent variables.
What is the probability that Company B would charge more than Company A to drill a well - The depths of wells drilled in this area have a normal distribution with a mean of 250 feet and a standard deviation of 40 feet.
Study the effect of temperature on yield in a chemical process, four batches were produced at each of three temperature levels and construct an analysis of variance table
environmentalists are concerned about emissions of sulfur dioxide into the air. the average number of days per year in
according to a website about salaries the national average salary as of october 2003 for a human resources clerk was
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