A study shows the number of hours per week school-aged children spent playing computer games is normally distributed with a mean of 10 hours and a standard deviation of 6 hours. Use the HonorLock calculator to find the z score of someone who plays 25 hours per week. Is the z score unusually high?

23. Pioli Company will receive $800,000 in a future year. If the future receipt is discounted at an interest rate of 8%, its present value is $504,136. In how many years will the $800,000 be received? For partial credit, show your work.

An insurance company conducts a survey of ten random sales agents. The table lists the average number of minutes spent with a potential customer and the number of policies sold in a week. Minutes   25   23   30   25   20   33   18   21   22  30 Sales   10   11   14   12   8    18   9   10   10   15 a.)  Use StatCrunch to find scatterplot that corresponds to the given data?  (Type the letter of the appropriate scatterplot into the answer box).               [scatterplot] b.) Based on the scatterplot graph, does the data represent a positive, negative or no linear correlation?  (Type either positive, negative, or no linear correlation into the answer box).              [correlation] c.)  Use StatCrunch to find the correlation coefficient r.            r = [r]   (Round to 2 decimals) d.)  Use StatCrunch to find the equation of the linear regression line.  Round each coefficient to 2 decimals.        

Refer to question 27 above. 27b. What is ending inventory (in dollars) at March 31, 2020 under the LIFO cost-flow method? 

22. Anne Carlson started a new job at age 25. She plans to invest $10,000 at the end of each year for the next 10 years and estimates earning a return of 5%. After 10 years of those investments, she expects her financial situation to change, and she will no longer contribute to her investment. If she leaves the investment in her account, what will be the balance of her account after 30 more years assuming the same 5% interest rate? For partial credit, show your work.

The following is a probability distribution of the number of cars (X) owned by 120 residents who live in the same neighborhood. Use StatCrunch to find the mean and standard deviation of the number of cars owned by the 120 residents.  X (Number of Cars)  1  2  3  4  5  P(X)  0.01  0.33  0.36  0.22  0.08

Listed below are the percentage of students graduating within four years from 36 randomly selected high schools in the nation. The results were: 62, 63, 67, 68, 68, 71, 72, 72, 74, 75, 77, 77, 78, 78, 78, 78, 80, 82, 82, 82, 82, 83, 84, 84, 85, 86, 87, 87, 87, 87, 87, 88, 88, 88, 88, 88.  a.)  You will make a frequency table with 6 classes.  Use the Honorlock calculator to find the class width.           [cw] b.)  Form a frequency table with 6 classes.     Class Limits    Frequency    [LL1] – [UL1]    [F1]    [LL2] – [UL2]    [F2]    [LL3] – [UL3]    [F3]    [LL4] – [UL4]    [F4]    [LL5] – [UL5]    [F5]    [LL6] – [UL6]    [F6] c.)  What is the distribution shape:  skewed left, skewed right, bell shaped, or uniform?          [shape]

Statsville Credit Union is considering switching from having multiple lines (one for each teller) to having one single line for all tellers. They recorded a random sample of customer wait times (in seconds) using each method.  Multiple Lines:   248   313   354   371   405   455   449   508   543   603 Single Line:         379   394   406   400   430   432   414   450   461   461          Use StatCrunch to find the mean and standard deviation of the times using each method.  Based on these data, which method appears to be better?

If 5 players out of 11 are selected to be on a basketball team, Use StatCrunch to find how many different teams can be formed?

The length of human pregnancies from conception to birth varies according to a distribution that is approximately normal with a mean of 266 days and standard deviation of 16 days. Use StatCrunch to find the probability that the average pregnancy length for 6 randomly chosen women exceeds 270 days.