# BAM 313 Week 3 Part 2 STATISITCS

Assignment 3 Part 2            DQR200

Name___________________________________00

Please print out part 2 of the assignment and submit it during class on Tuesday October 20th.

# Use the range rule of thumb to estimate the standard deviation. Round results to the nearest tenth.

 1) The race speeds for the top eight cars in a 200- mile race are listed below.185.0         182.7      189.2      188.2      175.6      175.8      181.5      178.9 1)

# Use the 68-95-99.7  rule to solve the problem.

• The time it take Claudia to drive to work is normally distributed with a mean of 46  2) minutes and a standard deviation of 5 minutes. What percentage of the time will it take her less than 61 minutes to drive to work?
• Scores on a test are normally distributed with a mean of 102 and a standard deviation of              3) 16. What percentage of scores are greater than 150?
• At one college, GPA’s are normally distributed with a mean of 2.9 and a standard deviation 4) of 0.4. What percentage of students at the college have a GPA between 2.1 and 3.7?
• The annual precipitation for one city is normally distributed with a mean of 30.6 inches 5) and a standard deviation of 2.8 inches. Fill in the blanks.

In 99.7% of the years, the precipitation in this city is between ___ and ___ inches.

# Please convert each exam grade to a stanard score and determine which score corresponds to the higher relative position.

6) Which is better, a score of 92 on a test with a mean of 71 and a standard deviation of 15, or a score 6) of 688 on a test with a mean of 493 and a standard deviation of 150?

1. A) Both scores have the same relative position. B) A score of 688 C) A score of 92

# Find the percentile for the data value.

7) Data set: 122 134            126         120         128 130 120         118         125 122 126         136         118         122         124 7)

119; data value: 130

30    35   43   44   47   48   54   55   56    57

59    62   63   65   66   68   69   69   71    72

72    73   74   76   77   77   78   79   80    81

81    82   83   85   89   92   93   94   97    98

9) The weights (in pounds) of 30 newborn babies are listed below. Find P36.   9)

5.5     5.7    5.8    5.9    6.1    6.1    6.4    6.4    6.5     6.6

6.7     6.7    6.7    6.9    7.0    7.0    7.0    7.1    7.2     7.2

7.4     7.5    7.7    7.7    7.8    8.0    8.1    8.1    8.3     8.7

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