A survey conducted by the American automobile association show that a family of four spent an average of $215.60 per day while on vacation. It's supposed to sample of 64 families of four vacationing at Niagara Falls resulted in a sample mean of $256.45 per day and a sample standard deviation of $76.50
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A survey conducted by the American automobile association show that a family of four spent an average of $215.60 per day while on vacation. It's supposed to sample of 64 families of four vacationing at Niagara Falls resulted in a sample mean of $256.45 per day and a sample standard deviation of $76.50
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- Calculate the sample size to study the average age of a Central State College student, plus or minus 0.4 years. We’d like to be 85% confident about our result. From a previous study, we know that the standard deviation for the population is 2.8.A total of 280 observations of Bob Ramos, an assembly-line worker, were made over a 40-hour work week. The sample also showed that Bob was busy working (assembling the parts) during o 230 bservations. (Round all intermediate calculations to at least two decimal places before proceeding with further calculations.) The number of observations that need to be taken of Bob to be 99% confident with 4% acceptablee error=The average cost of tuition plus room and board for a small private liberal arts college is reported to be $8500 per term but I financial administrator boys that the average cost is half a study conducted using 350 small liberal arts colleges showed that the average cost per term is $8745 the population standard deviation is $1200 let a =0.05.what is the p-value for this test
- SCCoast, an Internet provider in the Southeast, developed the following frequency distribution on the age of Internet users. Find the mean and the standard deviation. (Round squared deviations to nearest whole number and final answer to 2 decimal places.) Age (years) Frequency 10 up to 20 3 20 up to 30 7 30 up to 40 18 40 up to 50 20 50 up to 60 12The following temperatures (in oF) were recorded inside the building of a remote pumping station: 99, 87, 93, 90, and 96. The variance of these readings is closest to: (a) 11.7 (b) 22.5 (c) 31.1 (d) 38.6Given the following data .Find the OLS estimators using the deviation method. Y 6 10 9 14 7 5 X1 1 3 2 -2 3 5 X2 3 -1 4 6 2 4
- A sample of n = 16 scores has a mean of M = 56and a standard deviation of s = 12 . a. Explain what is measured by the sample standard deviation. b. Compute the estimated standard error for the sample mean and explain what is measured by the standard error.A random sample of residents from various income brackets was asked their opinion on tax reform for the country of Guyana. The data so gathered were analyzed by a statistician and the results he obtained using MINITAB are shown below: Expected counts are printed below observed counts Low Middle High Total For 26 (30.67) 75 (51.11) 14 (33.22) 115 Against 60 (69.33) 95 (115.56) 105 (**) 260 Neutral 34 (20) 30 (33.33) 11 (21.67) 75 Total * 200 130 450 Chi-sq = 0.71 + 11.17 + 11.12 + *** + 3.66 + 11.89 + 9.8 + 0.33 + 5.25 = 55.2 DF =??, p-value =??? Carefully define the null and alternative hypotheses of the x2 test underlying the generation of the above table. Find the missing values ‘*’, ‘**’, ‘***’, ‘??’ and ‘???’. What is the conclusion of this test? Give reasons for your answer.2 The sample variance is _______. a 8285.94 b 9469.64 c 10521.83 d 11690.92