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Find a 90% confidence interval for p

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Question

A research group conducted an extensive survey of 2864 style=”color:rgb(0,0,0);”> wage and salaried workers on issues ranging from relationships with their bosses to household chores. The data were gathered through hour-long telephone interviews with a nationally representative sample. In response to the question, “What does success mean to you?” 1633 responded, “Personal satisfaction from doing a good job.” Let p be the population proportion of all wage and salaried workers who would respond the same way to the stated question. Find a 90% confidence interval for p. (Round your answers to three decimal places.)lower limit     upper limit  

 
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How long did real cowboys live?

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Question

How long did real cowboys live?

One answer may be found in the book The Last Cowboys by Connie Brooks (University of New Mexico Press). This delightful book presents a thoughtful sociological study of cowboys in West Texas and Southeastern New Mexico around the year 1890. A sample of 32 cowboys gave the following years of longevity:

58 52 68 86 72 66

97 89 84 91 91 92 66 68 87 86 73 61 70 75 72 73 85 84 90 57 77 76 84 93 58 47

(a) Make a stem-and-leaf display for these data. (Use the tens digit as the stem and the ones digit as the leaf.)

Longevity of Cowboys 

(b) Consider the following quote from Baron von Richthofen in his Cattle Raising on the Plains of North America: “Cowboys are to be found among the sons of the best families. The truth is probably that most were not a drunken, gambling lot, quick to draw and fire their pistols.” Does the data distribution of longevity lend credence to this quote?

Sort of, these cowboys lived somewhat long lives, as evidenced by the high frequency of leaves for stems 5 and 6 (i.e., 50- and 60-year-olds).

No, these cowboys did not live long lives, as evidenced by the high frequency of leaves for stems 4 and 5 (i.e., 40- and 50-year-olds).

Yes, these cowboys certainly lived long lives, as evidenced by the high frequency of leaves for stems 7, 8, and 9 (i.e., 70-, 80-, and 90-year-olds).

 
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Draw a Venn diagram with each of the given elements placed in the correct region

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Question

Draw a Venn diagram with each of the given elements placed in the correct region.U= {2, 4, 5,

7,10,12,14}

A={2, 10, 12}

B={4,8}

C={6,8,10}

 
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Let U = {1, 2, 3, 4, 5, 6, 7, 8},A = {8, 2, 4},B = {5, 4, 1, 8}, and C = {1,

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Question

Let U = {1, 2, 3, 4, 5, 6, 7, 8},A = {8, 2, 4},B = {5, 4, 1, 8}, and C = {1,

5, 7}. Find the following. (Enter your answers as a comma-separated list. Enter EMPTY for the empty set.)

A ∩ (B ∩ C) 

 
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