the result of a statistical analysis shows that the tcalculate= 2.37 and the tcritical= 1.40. The alpha of the test was set at 0.05. What are your conclusions concerning the significance of the test? Would your conclusion change if the alpha were changed to 0.10 (assuming the tcritical and tcalculated stayed the same). Explain why or why not.

A random sample from a normal population has:n = 8, X-bar = 16, and s = 3. Find the 95% PI for asingle new value from the population.

Suppose the lengths of human pregnancies are normally distributed with µ = 266 days and o = 16 days. Complete parts (a) and (b) below. ..... (a) The figure to the right represents the normal curve with u = 266 days and o = 16 days. The area to the right of X= 300 is 0.0168. Provide two interpretations of this area. %3D Provide one interpretation of the area using the given values. Select the correct choice below and fill in the answer boxes to complete your choice. (Type integers or decimals.) A. The proportion of human pregnancies that last less than days is O B. The proportion of human pregnancies that last more than days is 266 300 Provide a second interpretation of the area using the given values. Select the correct choice below and fill in the answer boxes to complete your choice. (Type integers or decimals.) O A. The probability that a randomly selected human pregnancy lasts more than days is B. The probability that a randomly selected human pregnancy lasts less than days is (b)…

A researcher wants to know if a treatment significantly changes the wellbeing of someone with depression. The average person with depression scores a 7.2 on a wellbeing scale with a SD of 1.4 points. The researcher administers the treatment to 25 clients for a month and finds their wellbeing at the end to be 7.7. Assume an alpha level of .05.  Imagine we know that a treatment actually does have an effect but the researcher concludes there is no effect. 1a. What error has the researcher made?  1b. Why might a researcher make this error?  1c. What is the probability of this error?  1d. How could we decrease this probability?

Assume that ρxy = .30 between weight and exercise for the population of normal adults. However, a researcher believes the relationship is stronger for children. The researcher tests a sample of 28 children and obtains an rxy = .47. Does this result support the researcher’s belief? Conduct an appropriate statistical test using an alpha level of .05.

In a test of H0: p = 0.40 against Ha: p # 0.40, the sample data yield the test statistics z = 1.78. Find the p-value for this test. Round your answer to 4 decimal places.

1 - 0.90 = 0.1= 0.1 x 100 = .10 which makes a = .10? is the the correct (one of the correct equations) to find the alpha of a statistic?

. The statistic of z = -1.94 is obtained when testing the claim that p = 3⁄8