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In a study of pregnant women and their ability to correctly predict the sex of their baby, 56 of the pregnant women had 12 years of education or less, and 37.5% of them correctly predicted the sex of their baby. Use 0.01 significance level to test the claim that these wormen have no ability to predict the sex of their baby, and the results are not significantly different from those would be expected with random guesses. Identify the null hypothesis, alternative hypothesis, test statistic, P-value, conclusion about the null hypothesis, and final conclusion that addresses the original claim. Use the P-value. Use the normal distribution as an approximation of the binomial distribution.
A sample of n=9 scores is obtained from a normal population distribution with o-=12. The sample mean is M=60.
Give a 99% confidence interval for the proportion of adults who attended church or synagogue during the week preceding the poll.
If the scores are approximately normal with mean 544 and standard deviation 103, what minimum score would a student need in order to score in the top 10% of those taking the test?
Break-even analysis is an important part of fiscal education. Select an item or product used in a healthcare organization and describe how you would calculate the break-even point.
A company's records indicate that on any given day, 1% of their day shift employees and 2% of the night shift employees will miss work. Sixty percent of the employees work the day shift. What percent of employees are absent on any given day?
in a recent study of 35 ninth-grade students the mean number of hours per week that they played video games was 16.6.
Choose an article that explains research using one or more statistical tests (z, t, ANOVA, chi square, regression) as part of data analysis. Explain the study using the following information:
why is the t-test more widely useful for hypothesis testing compared to a
If a baseball player's batting average is 0.340 or 34%, find the probability that the player will have a bad season and only score at most 60 hits in 200 times at bat?
The 99% confidence interval estimating the proportion of all students at the university who prefer outdoor exercise is given by which of the following?
Do you believe that the variance of sales before announcement of increasing price is equal to variance of sales after announcement?
which is a characteristic of the variance inflation factor vif?a. it is insignificant unless the corresponding
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