In the probability distribution table below, the random vari…

In the probability distribution table below, the random variable x is the number of emails received in a day by a math professor.  Answer the following questions below rounding all answers to two decimals. x P(x) 0 0.05 1 0.10 2 0.20 3 0.25 4 0.30 5 0.10 a.  Find the parameters for mean [mu] and standard deviation [sigma] b.  Use the parameters and the range rule of thumb to find the cutoffs for significantly low [siglow] and significantly high [sighigh] c.  What is the probability the professor will get exactly 1 email?  [equal1] d.  What is the probability the professor gets 3 or more emails? [3ormore]

The number of hours a battery lasts before failing is strong…

The number of hours a battery lasts before failing is strongly skewed to the right.  Answer the following questions regarding the Central Limit Theorem.   a.  True or False, we can use a normal distribution to find probabilities about a single battery. [one] b.  True or False, we can use a normal distribution to find probabilities about the mean of a pack of 12 batteries. [twelve] c.  True or False, we can use a normal distribution to find probabilities about the mean of a pack of 24 batteries. [24] d.  True or False, we can use a normal distribution to find probabilities about the mean of a pack of 48 batteries. [48]

Try the links below to access StatCrunch.  If for some reaso…

Try the links below to access StatCrunch.  If for some reason it does not let you access StatCrunch, exit the test immediately and contact me. The first is a direct link to a StatCrunch Spreadsheet.  If the buttons are greyed out sign in at the top right of the page: https://www.statcrunch.com/app/index.phpLinks to an external site. Next is the statcrunch homepage and login page.  Try these links if you have any problems logging in with the previous link.  After you login try the link above again. https://www.statcrunch.com/Links to an external site. https://login.pearson.com/v1/piapi/piui/signin?siteid=10529&client_id=eIGhxJPAx04baGpQ2XTxrLZ5tq2LG6Ss&okurl=https:%2F%2Fwww.statcrunch.com%2FLinks to an external site.