document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=402962>Question 402962</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help me solve these problems. <BR>\n" );
document.write( "1. Calculate the sample mean and standard deviation for the age of Bigcone Douglas-fir trees based on the data above. If this accurately represents the population mean and standard deviation for the age of surviving Bigcone Douglas-fir trees in the burn area, what is the probability that a randomly selected surviving Bigcone Douglas-fir tree from the burn area will be less than 0 years old? Round to the nearest hundredth. Based on this result, is it logical to assume that the population of age of surviving Bigcone Douglas-fir trees in the burn area is normally distributed with the parameters identified. \r<BR>\n" );
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document.write( "2.Determine the appropriate approach to conduct a hypothesis test for this claim: Fewer than 5% of patients experience negative treatment effects. Sample data: Of 500 randomly selected patients, 2.2% experience negative treatment effects. <BR>\n" );
document.write( "A) Use the normal distribution.<BR>\n" );
document.write( "B) Use the Student t distribution.<BR>\n" );
document.write( "C) Use the chi-square distribution.<BR>\n" );
document.write( "D) Use nonparametric or bootstrapping methods\r<BR>\n" );
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document.write( "3. Determine the appropriate approach to conduct a hypothesis test for this claim: The systolic blood pressure of men who run at least five miles each week varies less than does the systolic blood pressure of all men. Sample data: n = 100 randomly selected men who run at least five miles each week, sample mean = 108.4, and s = 20.3<BR>\n" );
document.write( "A) Use the normal distribution.<BR>\n" );
document.write( "B) Use the Student t distribution.<BR>\n" );
document.write( "C) Use the chi-square distribution.<BR>\n" );
document.write( "D) Use nonparametric or bootstrapping methods.\r<BR>\n" );
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document.write( "4. Determine the appropriate approach to conduct a hypothesis test for this claim: The mean sodium content of a 30 g serving of snack crackers is 2,200 mg. Sample data: n = 130 snack crackers, sample mean = 3,100 mg, and s = 570. The sample data appear to come from a normally distributed population (0.5 point).<BR>\n" );
document.write( "A) Use the normal distribution.<BR>\n" );
document.write( "B) Use the Student t distribution.<BR>\n" );
document.write( "C) Use the chi-square distribution.<BR>\n" );
document.write( "D) Use nonparametric or bootstrapping methods\r<BR>\n" );
document.write( "\n" );
document.write( "Thank you very much, <BR>\n" );
document.write( "Lara  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #285018 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=285018\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 1. Calculate the sample mean and standard deviation for the age of Bigcone Douglas-fir trees based on the data above. If this accurately represents the population mean and standard deviation for the age of surviving Bigcone Douglas-fir trees in the burn area, what is the probability that a randomly selected surviving Bigcone Douglas-fir tree from the burn area will be less than 0 years old? Round to the nearest hundredth. Based on this result, is it logical to assume that the population of age of surviving Bigcone Douglas-fir trees in the burn area is normally distributed with the parameters identified.<BR>\n" );
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document.write( "Comment: No data was posted and number(s) are missing from the post of<BR>\n" );
document.write( "this #1 problem.<BR>\n" );
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document.write( " <BR>\n" );
document.write( "2.Determine the appropriate approach to conduct a hypothesis test for this claim: Fewer than 5% of patients experience negative treatment effects. Sample data: Of 500 randomly selected patients, 2.2% experience negative treatment effects. <BR>\n" );
document.write( "A) Use the normal distribution.<BR>\n" );
document.write( "B) Use the Student t distribution.<BR>\n" );
document.write( "C) Use the chi-square distribution.<BR>\n" );
document.write( "D) Use nonparametric or bootstrapping methods<BR>\n" );
document.write( "Ans: It's a proportion test. Use the normal distribution.<BR>\n" );
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document.write( " <BR>\n" );
document.write( "3. Determine the appropriate approach to conduct a hypothesis test for this claim: The systolic blood pressure of men who run at least five miles each week varies less than does the systolic blood pressure of all men. Sample data: n = 100 randomly selected men who run at least five miles each week, sample mean = 108.4, and s = 20.3<BR>\n" );
document.write( "A) Use the normal distribution.<BR>\n" );
document.write( "B) Use the Student t distribution.<BR>\n" );
document.write( "C) Use the chi-square distribution.<BR>\n" );
document.write( "D) Use nonparametric or bootstrapping methods.<BR>\n" );
document.write( "Ans: It's a means test. Use the t-distribution<BR>\n" );
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document.write( " <BR>\n" );
document.write( "4. Determine the appropriate approach to conduct a hypothesis test for this claim: The mean sodium content of a 30 g serving of snack crackers is 2,200 mg. Sample data: n = 130 snack crackers, sample mean = 3,100 mg, and s = 570. The sample data appear to come from a normally distributed population (0.5 point).<BR>\n" );
document.write( "A) Use the normal distribution.<BR>\n" );
document.write( "B) Use the Student t distribution.<BR>\n" );
document.write( "C) Use the chi-square distribution.<BR>\n" );
document.write( "D) Use nonparametric or bootstrapping methods<BR>\n" );
document.write( "Ans: Means test. Use the t-distribution.<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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