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 It has been reported that 9 % of phones manufactured by a certain company for a product launch did not meet the quality standards. An engineer needs at least one defective Phone so she can try to identify the problem(s). If she randomly selects 13 phones from a very large batch, what is the probability that she will get at least 1 that is defective? Is that probability high enough so that she can be reasonably sure of getting a defect for her work? Probability that at least one phone out of a sample of 13 is defective is (round to 4 decimal places). [a] Is the probability high enough so that she can be reasonably sure of getting a defect for her work? Type Yes or No in the box below.  [b]

A school put on a music program.  Adult tickets were sold for $6.00 each, and child tickets were sold for $1.50 each.  The school collected $1,542.00 from ticket sales.  If a total of 326 tickets were sold, how many were adult tickets and how many were child tickets? [a] adult tickets were sold. [b] child tickets were sold.

The table below shows the head size of 30 male soldiers in inches. The head size was measured by wrapping a tape measure around the solder’s head. Construct a stem plot for the head size data set. If a stem has no corresponding leaves, put a dash, like this – .     Stems Leaves 24 [a] 25 [b] 26 [c] 27 [d] 28 [e] 29 [f] 30 [g] 31 [h] 32 [i]  

This question is extra credit.  I will grade it after you turn in the test. Let’s calculate the standard deviation by hand for the following set of sample data. 5     14     1     1     4 First, calculate the mean: 

According to Bloomberg News, in 2011 the average annual salary for a player in the National Hockey League (NHL) were $760,000 and $1,800,000, although not necessarily in that order.  Which of these numbers, $760,000 and $1,800,000, is the mean and which is the median? Give a reason for your answer.

Fayech University claims that the mean GPA of night students is approximately normally distributed with mean 3 with a population standard deviation of 0.08. We wish to test the claim that the mean GPA of night students is significantly different than 3 at the 0.2 significance level.  Based on a sample of 25 people, we find the sample mean GPA was 2.97. The null and alternative hypothesis would be: [a] Type the letter of the correct option in the box above. A B C D E F The test is: [b] Type the letter of the correct option in the box above. A B C two-tailed left-tailed right-tailed   The test statistic is [d] (to 2 decimals) The p-value is:  [e] (to 2 decimals) Draw a picture of this graph on your scratch paper.  I will grade the graph after you upload your work. [c] Based on this we [f] A B Fail to reject the null hypothesis Reject the null hypothesis  

A school put on a music program.  Adult tickets were sold for $5.00 each, and child tickets were sold for $2.00 each.  The school collected $1,189.00 from ticket sales.  If a total of 305 tickets were sold, how many were adult tickets and how many were child tickets? [a] adult tickets were sold. [b] child tickets were sold.

Suppose you want to estimate the percentage of videos on YouTube that are cat videos. It is impossible for you to watch all videos on YouTube so you use a random video picker to select 1000 videos for you. You find that 4% of these videos are cat videos. Based on the above, identify the following as an observation, a variable, a sample statistic, or a population parameter. a) The percentage of all videos on YouTube that are cat videos. [a] b) 4% [b] c) A video in your sample [c] d) Whether or not a video is a cat video [d]  

The annual rainfall in a certain region is approximately normally distributed with mean 41.2 inches and standard deviation 5.4 inches. Round answers to the nearest tenth of a percent.a) What percentage of years will have an annual rainfall of less than 43 inches?  [a]% b) What percentage of years will have an annual rainfall of more than 39 inches?  [b]% c) What percentage of years will have an annual rainfall of between 38 inches and 42 inches?  [c]%

A school put on a music program.  Adult tickets were sold for $5.00 each, and child tickets were sold for $3.50 each.  The school collected $1,411.00 from ticket sales.  If a total of 323 tickets were sold, how many were adult tickets and how many were child tickets? [a] adult tickets were sold. [b] child tickets were sold.