Use Table 1 to answer the following questions Table 1 x P(x) 10.14 20.16 30.12 40.14 50.13 60.31 (Part A) Does the table above represent a probability distribution? Yes or no? (Part B) Find the mean of this probability distribution, rounding to 2 decimal places as needed. If this is not a probability distribution, type in X instead. (Part C) Find the standard deviation of this probability distribution, rounding to 2 decimal places as needed. If this is not a probability distribution, type in X instead.

Statistics: Answer the following using excel Assume that the time it takes to finish a particular task of a complicated manufacturing process follows a normal distribution with a mean of 4.3 minutes with a standard deviation of 0.7 minutes. a) what is the probability that it takes longer than 5 minutes to complete this task? b) what is the probability that it takes anywhere between 4 and 5 minutes to complete this task?

Intelligence Quotient (IQ) scores are often reported to be normally distributed with u = 100.0 and o = 15.0. A random sample of 45 people is taken. Step 1 of 2: What is the probability of a random person on the street having an IQ score of less than 99? Round your answer to 4 decimal places, if necessary. Answer O Tables 即 Keypa Keyboard Shorto

* 00 What requirements are necessary for a normal probability distribution to be a standard normal probability distribution? Answer: The mean and standard deviation have the value of u = and o = %3D

Question 7

Historical data show that customers who download music from a popular Web service spend approximately $22 per month, with a standard deviation of $3. Assume the spending follows the normal probability distribution. Find the probability that a customer will spend at least $19 per month. How much (or more) do the top 9% of customers spend? What is the probability that a customer will spend at least $19 per month? (Round to four decimal places as needed.) How much do the top 9% of customers spend? (Round to the nearest cent as needed.)

Determine the required value of the missing probability to make the distribution a discrete probability distribution. P(x) 0.28 4 0.28 0.22 P(4) = (Type an integer or a decimal.) %3D Enter your answer in the answer box and then click Check Answer. All parts showing esc -> % 5