The distribution of average hours worked per week for random samples of 1000 workers in the U.S. has a mean of 40 and a standard error of 0.04 The distribution in this scenario is a: sampling distribution sample distribution population distribution
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- 12need help with parts A, D and E pleaseThe letter grades in a Statistics course are distributed as follows: Grade A B C D F Frequency A=49 B=18 C=32 D=20 F=16 Is there any evidence that the distribution of grades is uniform, at 5% level of significance?Need crit value, the pictured question b, and rejection region.
- The annual salary for one particular occupation is normally distributed, with a mean of about $132,000 and a standard deviation of about $16,000. Random samples of 26 are drawn from this population, and the mean of each sample is determined. Find the mean and standard deviation of the sampling distribution of these sample means. Then, sketch a graph of the sampling distribution.The sample mean is often used as an estimator of the population mean because of its desirable properties, including: a. unbiasedness, consistency and efficiency Ob.consistency and minimum sampling error only Oc unbiasedness and consistency only Od. unbiasedness and efficiency only Oe. unbiasedness, consistency and minimum sampling errorCalculate the sample mean and sample variance for the following frequency distribution of heart rates for a sample of American adults. If necessary, round to one more decimal place than the largest number of decimal places given in the data. Heart Rates in Beats per Minute Class Frequency 51 - 5851 - 58 77 59 - 6659 - 66 1313 67 - 7467 - 74 1111 75 - 8275 - 82 55 83 - 9083 - 90 3
- A partial relative frequency distribution is given. The total sample size is 200. What is the frequency of class D? Relative Class Frequency A 0.24 B 0.26 0.40 DThe table below shows the age distribution of a sample of 150 students at UCC. Find an estimate of the variance and standard deviation. Age 25-34 35-44 45-54 55-64 Number 33 39 48 30A random survey is collected on the number of children of different age groups who play in government parks and the information is tabulated in the frequency distribution given below: Age (years) Number of children 1 - 2 8 2 - 4 10 4 - 7 18 7 - 9 10 9 - 11 12 11 -15 6…
- Women are recommended to consume 1870 calories per day. You suspect that the average calorie intake is larger for women at your college. The data for the 11 women who participated in the study is shown below: 1799, 1703, 2097, 2112, 1824, 1956, 2072, 2113, 1951, 1872, 2126 Assuming that the distribution is normal, what can be concluded at the a = 0.01 level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Họ: ?v Select an answer v H: ? vSelect an answer c. The test statistic (please show your answer to 3 decimal places.) d. The p-value = e. The p-value is ? f. Based on this, we should Select an answer g. Thus, the final conclusion is that ... O The data suggest that the population mean calorie intake for women at your college is not significantly more than 1870 at a = 0.01, so there is insufficient evidence to conclude that the population mean calorie intake for women at your college is more than 1870. (Please show your…The results shown below are mean productivity measurements (average number of assemblies completed per hour) for a random sample of workers at each of three plants. Research question: Are the mean hourly productivity levels the same for workers in these three plants? Hourly Productivity of Assemblers in Plants Plant Finished Units Produced per Hour A (9 workers) 3.6 5.1 2.8 4.6 4.7 4.1 3.4 2.9 4.5 B (6 workers) 2.7 3.1 5.0 1.9 2.2 3.2 C (10 workers) 6.8 2.5 5.4 6.7 4.6 3.9 5.4 4.9 7.1 8.4 Click here for the Excel Data File Fill in the missing data. (Round your p-value to 4 decimal places, mean values to 2 decimal places, and other answers to 3 decimal places.) Group Mean n Std. Dev Variance Plant A Plant B Plant C Total One-Factor ANOVA Source SS df MS F p-value Treatment Error Total Based on the hypotheses given below, choose the correct option.…A stemplot for a set of data is given below. What is the shape of the distribution? Stem Leaf 267 36 4228 5 1469 6 4589 7 225669 8 00112347899 9011223344456668889 10 155666777 11 1377 12 a. symmetrical b. skewed to the left c skewed to the right d. bimodal 1.