Author: Anonymous

Sample data set: 10        22        12        18        11        27        10        15The standard deviation of the above data set is (round appropriately):

Sample data set:10        22        12        18        11        27        10        15The mean of the above data set is:

Examine the statement and tell what misuse of statistics may be involved:In a study of cold symptoms, every one of the subjects with a cold was found to be improved 2 weeks after taking ginger pills.  The study concludes that ginger pills cure colds.

Use the following table of algebra and calculus scores. Algebra (x)   36       46      45      43      32      30      22      47    Calculus (y)     77   92   87   81   71   63   53   88   If a hypothesis test was performed on the above data set,  what is the p-value (step 4 of the Linear Regression hypothesis test)?

Answer the question. Use the range rule of thumb for usual values: Minimum = Mean – 2 standard deviations and Maximum = Mean + 2 standard deviations Focus groups of 12 people are randomly selected to discuss products of the Yummy Company. It is determined that the mean number (per group) who recognize the Yummy brand name is 8.8, and the standard deviation is 0.85. Would it be unusual to randomly select 12 people and find that fewer than 5 recognize the Yummy brand name?

Find the indicated probability. A sample of 4 different calculators is randomly selected from a group containing 50 that are defective and 23 that have no defects. What is the probability that ALL 4 of the calculators selected (without replacement) are defective? 

A study of the amount of time it takes a mechanic to rebuild the transmission for a 1992 Chevrolet Cavalier shows that the mean is 8.4 hours and the standard deviation is 1.8 hours. If 40 mechanics are randomly selected, find the probability that their mean rebuild time exceeds 7.7 hours.

Claim:  Most adults would erase all of their personal information online if they could. A software firm survey of 670 randomly selected adults showed that 62​% of them would erase all of their personal information online if they could. H0: [a1][a2][a3] HA: [a4][a5][a6]   Find the p-value. [a7]

Which of the following values cannot be probabilities?

Identify which of the 5 sampling techniques is being used. To avoid working late, the quality control manager inspects the last 10 items produced that day.