STA 1300 Practice Question Chapters 1,2, and 6

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California Polytechnic State University, Pomona *

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1300

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Statistics

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Apr 3, 2024

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pdf

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STA 1300 Practice Questions for Chapters (1,2, and 6) The following data describe rain precipitations of a city (inches) during one season. Class Frequency Relative Frequency [0 - 1) 9 0.138 [1 - 2) 26 0.400 [2 - 3) 11 0.169 [3 - 4) 13 [4 - 5) 3 0.046 [5 - 6) 1 0.015 [6 - 7) 2 0.031 Answer the following questions based on the information given in the table. a. Find the class width. b. What is the total frequency? c. Is the minimum rain precipitation 0 (inches)? Yes No Don’t know d. Is the minimum rain precipitation in the class of 0 to 1? Yes No e. Is the maximum rain precipitation in the class of 6 to 7? Yes No f. What is the relative frequency of the values in class, [3 to 4) ? g. Is it unusual to have rain precipitation of 5 or more inches in this city? h. Describe the distribution shape of the data. i. Find the frequency and the relative frequency of the values less than 3 inches?

2. Heights of 9-year old children in a state are normally distributed with a mean of 52.5 inches with a standard deviation of 10.3 inches. Use the empirical rule to answer the following questions. a. What are the two values that contain middle 68% of the data? b. What percent of heights are between 21.6 and 83.4 inches? 3. Given the following data values, find the mean, standard deviation, Q1, Q2, Q3, and the Interquartile range. Also, create a box plot. 7 , 17, 20, 32, 24, 27, 11, 15, 30, 26 4. Interpret the following boxplots. 1) Customers’ wait time s (minutes) for a teller service at a bank 2) Weights of Men in kg (1993 and 2017): 1 kg is about 2.2 pounds.

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