Find the P-value for a left-tailed hypothesis test with a test statistic of z= -1.17. Decide whether to reject Ho if the level of significance is α = 0.10. Com P-value = (Round to four decimal places as needed.)

The National Center for Health Statistics reports that the mean systolic blood pressure for males 35 to 44 years of age is 128 with a standard deviation of 15.  In a sample of 72 CSLA male faculty members in this age group a nursing faculty member found an average systolic blood pressure of 126. (1) State the null and alternative hypotheses for this study (2) What is the dependent and independent variable for this study (3) What test statistic/hypothesis test would you select to determine if the means are significantly difference at the alpha .05 level? (4) What critical value would you use to make your decision to reject or retain the null hypothesis at alpha .05?

Select a significance level α and reject the null-hypothesis if the p-value is less than α. Explain, in complete sentences, your findings: Is there a statistically significant association (at α level) between the provided genes? What is the magnitude and the direction of the association?

If a n=30 random sample from a normal population with variance  σ^2=2084.49 and a sample mean of 188.1 is taken. construct a 60% confidence interval for the population mean µ construct a 99% confidence interval for the population mean µ what is the best point estimate of the population mean what is the best point estimate of the population variance

#4 It must be in the format of the second picture.

I wanted to test if the mean Exam 3 score in this course was different than the mean Exam 2 score. To conduct this test I used the 30 students in my course last semester as my sample. I first calculated the difference in scores between Exam 2 and Exam 3 ("Exam 2 score - Exam 3 score"). The sample mean of these differences is 2.0 and the sample standard deviation of the differences is 3.0. What is the null hypothesis of this test?    Group of answer choices The mean difference between exam scores is not equal to 0 The mean difference between exam scores is not equal to 2.0 The mean difference between exam scores is equal to 2.0 The mean difference between exam scores is equal to 0

(a) Why is an unbiased statistic generally preferred over a biased statistic for estimating a population characteristic? An unbiased statistic is generally preferred over a biased one because the unbiased statistic ---Select- v, on average, give the correct value for the population characteristic being estimated, while the biased one --Select-- (b) Does unbiasedness alone guarantee that the estimate will be close to the true value? Explain. Unbiasedness alone -Select-- v guarantee that the value of the statistic will be close to the true value of the population characteristic, since, if the statistic has a large standard deviation, values of the statistic will tend to be ---Select--- v the population characteristic. (c) Under what circumstances might you choose a biased statistic over an unbiased statistic if two statistics are available for estimating a population characteristic? A biased statistic might be chosen in preference to an unbiased one if the biased statistic has a…

3

N1=94 X1=26 N2=78 X2=39 Confidence interval 99% ?

A correlation coefficient is computed from a sample of data values selected from a population is called a statistic and is subject to sampling error. True or  False.