Find each of the following. Enter your answers rounded to at least two decimal places.  for the za/2 90% confidence interval: za/2 fpr the 86% confidence interval: za/2 for the 95% confidence interval: za/2 for the 99% confience interval: za/2 for the 94% confidence interval:

A researcher surveyed 12 men who lost their fathers earlier in their lives.  His survey included the age of the subjects when their fathers died and their confidence that they would someday be happily married themselves (100 point scale – higher score = more confidence).  The results are shown below. Mx=15                My =60 SSx=348            SSy=5198 SPxy=933 Age Confidence Rating 12 34 8 30 11 89 21 69 15 55 7 38 18 78 23 66 22 89 19 79 9 35 15 58 Can you estimate a confidence rating for a man who lost his father at 30 years old? Why or why not?

Step 2 of 3:  Compute the value of the test statistic. Round your answer to three decimal places. tep 3 of 3:  Draw a conclusion and interpret the decision.

The IQR (interquartile range) is the difference between Q3 and Q1. For the data below (same data as in previous questioni find the IQR: IQR- A value is considered unusually small if it is 1.5 IQR smaller then the median and is considered unusually large if it is 15 1QR larger then the median. Based on this, what is the smallest usual value for the data set? (do not round, type as a decimal What is the largest usual value for the data set? (do not round, type as a decimal) An outlier would be a data value which is smaller then the smallest unual data value or larger then the largest data value. If there is an outier, type the value of the authier below. Otherwise type N. Data set:

Given the data below: x̄ = 500, σ = 30, n = 10 A 99% confidence interval would be 500 ± _______(round your answer to two spaces past the decimal).

A researcher surveyed 12 men who lost their fathers earlier in their lives.  His survey included the age of the subjects when their fathers died and their confidence that they would someday be happily married themselves (100 point scale – higher score = more confidence).  The results are shown below. Mx=15                My =60 SSx=348            SSy=5198 SPxy=933 Age Confidence Rating 12 34 8 30 11 89 21 69 15 55 7 38 18 78 23 66 22 89 19 79 9 35 15 58 The effect size is equal to _____________ . This means it is a ______________ effect.

A sample of n = 10 scores has a mean of 7. If a new score of X = 18 is added to the sample, what will be the new value for the sample mean?     8.0     8.8     9.78     6.36

A population of scores has a mean of µ=89, a median of 87 and a mode of 85. What is the most likely shape for the population distribution? Symmetrical Positively skewed Negative skewed It cannot be determined from the information given O O

Suppose the relationship between Y and X is given by: Y = 4 + 3.2*X + error  By how much does the expected value of Y change if X increases by 1.29 units? (Round your answer to two decimal places: ex: 123.45)