Annual starting salaries for college graduates with degrees in business administration are generally expected to be between $10,000 and $35,000. Assume thata 95% confidence interval estimate of the population mean annual starting salary is desired.a. What is the planning value for the population standard deviation?0 =b. How large a sample should be taken if the desired margin of error is $300? Use a rounded z value (2 decimals) in your calculations. Round your answer for nto next whole number.$150?$100?c. Would you recommend trying to obtain the $100 margin of error? Explain.- Select your answer -

The confidence level is Expected value is between .The objective is to compute the standard…

Answered: Annual starting salaries for college…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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You work for a soft-drink company in the quality control division. You are interested in the standard deviation of one of your production lines as a measure of consistency. The product is intended to have a mean of 12 ounces, and your team would like the standard deviation to be as low as possible. You gather a random sample of 14 containers. Estimate the population standard deviation at a 90% level of confidence. 12.07 11.96 11.93 12.16 12.06 11.9 12.06 12.21 11.86 12.03 11.86 11.83 11.99 12.09 (Data checksum: 168.01) Note: Keep as many decimals as possible while making these calculations. If possible, keep all answers exact by storing answers as variables on your calculator or computer. a) Find the sample standard deviation: b) Find the lower and upper χ2χ2 critical values at 90% confidence:Lower: Upper: c) Report your confidence interval for σσ: ( , )
What was the age distribution of prehistoric Native Americans? Extensive anthropological studies in the southwestern United States gave the following information about prehistoric extended family group of 96 members on what is now a Native American reservation. For this community, estimate the mean age expressed in years, the sample variance, and the sample standard deviation. For the class 31 and over, use 35.5 as the class midpoint. (Round your answer to one decimal place.) Average range(years) 1-10 11-20 21-30 31 and over # of individuals 36 22 24 14 Mean=S2= S=
You want to obtain a sample to estimate how much parents spend on their kids birthday parties. Based on previous study, you believe the population standard deviation is approximately o 69.8 dollars. You would like to be 90% confident that your estimate is within 3 dollar(s) of average spending on the birthday parties. How many parents do you have to sample? n= Submit Question
Esp Heavy children: Are children heavier now than they were in the past? The National Health and Nutrition Examination Survey (NHANES) taken between 1999 and 2002 reported that the mean weight of six-year-old girls in the United States was 49.3 pounds. Another NHANES survey, published in 2008, reported that a sample of 193 six-year-old girls weighed between 2003 and 2006 had an average weight of 52 pounds. Assume the population standard deviation is o =16 pounds. Can you conclude that the mean weight of six-year-old girls in 2006 is different from what it was in 2002? Use the a =0.01 level of significance and the critical value method. 00 Part: 0/ 5 Part 1 of 5 (a) State the appropriate null and alternate hypotheses. H.: OD O=0 dl. H : This hypothesis test is a (Choose one) test. 00
n the 1992 presidential election, Alaska's 40 election districts averaged 2111 votes per district for President Clinton. The standard deviation was 551. (There are only 40 election districts in Alaska.) The distribution of the votes per district for President Clinton was bell-shaped. Let X = number of votes for President Clinton for an election district. (Source: The World Almanac and Book of Facts) Round all answers except part e. to 4 decimal places.a. What is the distribution of X? X ~ N(,)b. Is 2111 a population mean or a sample mean? Select an answer Population Mean Sample Mean c. Find the probability that a randomly selected district had fewer than 2134 votes for President Clinton. d. Find the probability that a randomly selected district had between 2048 and 2241 votes for President Clinton. e. Find the first quartile for votes for President Clinton. Round your answer to the nearest whole number.
What was the age distribution of prehistoric Native Americans? Extensive anthropological studies in the southwestern United States gave the following information about prehistoric extended family group of 85 members on what is now a Native American reservation. For this community, estimate the mean age expressed in years, the sample variance, and the sample standard deviation. For the class 31 and over, use 35.5 as the class midpoint. (Round your answer to one decimal place.) Average range(years) 1-10 11-20 21-30 31 and over # of individuals 35 23 16 11 Mean=S2= S=
On average, accountants earn approximately an average of $6500 per year in the United States. Assume that the distribution for electricians’ yearly earnings is normally distributed and that the standard deviation is $8680. Given a sample of 64 electricians, what is the standard deviation for the sampling distribution of the sample mean? a. 1205 b. 8680 c. 6000 d. 1085
The weights for newborn babies is approximately normally distributed with a mean of 6.1 pounds and a standard deviation of 1.8 pounds. Use the Cumulative Z-Score Table to answer the questions below. Write your answers rounded to the nearest whole number. Consider a group of 1200 newborn babies: • How many would you expect to weigh between 7.72 and 9.34 pounds? • How many would you expect to weigh less than 9.7 pounds? How many would you expect to weigh more than 6.37 pounds? How many would you expect to weigh between 6.1 and 7.54 pounds?
find the actual percentage in the data set, sort the DRIVE variable and count how many of the data points are less than 25 out of the total 35 data points. That is the actual percentage. How does this compare with your prediction? Mean: 57.457 Standard deviation: 26.539 Predicted percentage: 0.110 Drive: 44 20 88 6 71 42 76 63 61 63 84 28 55 33 88 80 86 83 5 85 25 25 54 54 81 73 29 76 78 77 42 65 71 94 6
Use the magnitudes (Richter scale) of the 120 earthquakes listed in the accompanying data table. Use technology to find the range, variance, and standard deviation. If another value, 8.00, is added to those listed in the data set, do the measures of variation change much? 3.30 2.77 2.80 1.96 1.69 2.54 2.43 3.44 3.92 1.58 2.87 1.63 2.56 3.95 2.50 2.44 1.82 2.19 2.44 2.99 2.92 2.35 1.98 3.06 2.78 3.86 2.95 2.07 1.86 2.36 2.37 3.46 3.45 1.54 2.54 1.49 2.22 3.06 2.27 3.20 1.96 1.91 2.40 2.95 2.61 1.49 2.16 2.33 1.91 2.70 2.92 1.80 3.66 2.69 1.43 3.60 3.13 2.56 1.54 1.41 2.83 2.85 2.20 1.68 3.18 1.38 1.73 2.37 1.15 2.35 2.46 1.81 2.01 3.00 1.94 2.42 1.85 2.24 2.35 3.22 3.97 2.10 1.48 2.31 2.31 2.62 2.55 2.20 2.77 2.46 2.69 3.57 2.84 2.75 3.26 1.74 4.72 3.23 2.36 2.00 3.83 2.41 2.88 2.67 2.32 2.80 2.80 2.40 3.41 2.34 1.49 2.41 2.45 2.50 2.73 2.44 2.78 2.65 2.68 2.43 Without the extra data value, the range is 3.573.57. (Type an integer or…
Bob Nale is the owner of Nale's Quick Fill. Bob would like to estimate the mean number of gallons of gasoline sold to his customers. Assume the number of gallons sold follows the normal distribution with a population standard deviation of 1.90 gallons. From his records, he selects a random sample of 80 sales and finds the mean number of gallons sold is 7.00. a. What is the point estimate of the population mean? (Round your answer to 2 decimal places.) Point estimate b. Determine a 99% confidence interval for the population mean. (Use z Distribution Table.) (Round your answers to 2 decimal places.) Confidence interval and Prev 1 of 6 waw www Next >

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