The distribution of average years to degree for random samples of 100 PhD students in the U.S. has a mean of 5.8 with a standard error of 0.2. What type of distribution is this? population distribution sampling distribution sample distribution
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- The average retirement age in America is 64 years old. Do small business owners retire at an older average age? The data below shows the results of a survey of small business owners who have recently retired. Assume that the distribution of the population is normal. 72, 65, 68, 64, 59, 65, 74, 59, 63, 65, 65, 61, 62, 68, 71 What can be concluded at the 0.05 level of significance? Set-up, Interpretations Helpful Videos:Calculations, Hint Textbook Pages Ho: μ = 64 На: р [Select] 64 Test statistic: [Select] p-Value = [Select ] [Select] Conclusion: There is [Select] population mean retirement age for small business owners is older than 64. A evidence to make the conclusion that theQuestion: How to describe normal distribution and skewed in the histogram and density plots in general. Also, explain any correlation we observe between the response and predictor variables in any scatter plots in general.Which measure of central tendency can be used to describe a distribution at any level of measurement (nominal, ordinal, or interval)? standard deviation median mean mode
- HW Score: 0%, O of 16 pts Question Help O The price-earnings ratios for all companies whose shares are traded on a specific stock exchange followa normal distribution with a standard deviston of 43 Arandom sample of these companies is selected in order to estimate the population mean price-earnings ratio Complete parts (a) through (c) a How large a sample is necessary in order to ensure that the probablity that the sample mean differs from the population mean by more than 1.1s less than 0 107 The sample size must be at least 42. (Type a whole number) b. Without doing the calculations, state whether a larger or smaller sample size compared to the sample sze in part (a) wouid be requred to guaranlee that the probability of the sample mean differing from the population mean by more than 1.1 is less than 0.05 Incorrect: O The sample size would need to beAssume the samples are random and independent, the populations are nomally distributed, and the population variances are equal. The table available below shows the prices (in dollars) for a sample of automobile batteries. The prices are classified according to battery type. At a = 0.10, is there enough evidence conclude that at least one mean battery price is different from the others? Complete parts (a) through (e) below. E Click the icon to view the battery cost data. (a) Let u1. P2. H3 represent the mean prices for the group size 35, 65, and 24/24F respectively. Identify the claim and state Ho and H. H Cost of batteries by type The claim is the V hypothesis. Group size 35 Group size 65 Group size 24/24F 101 111 121 124 D 146 173 182 278 124 140 141 89 (b) Find the critical value, Fo, and identify the rejection region. 90 79 84 The rejection region is F Fo, where Fo = (Round to two decimal places as needed.) (c) Find the test statistic F. Print Done F= (Round to two decimal places as…Question: the number of candies in a bag is normally distributed with a mean of 200 and a standard deviation of 3. In what percentile is a bag with 206 candies? please show all steps.
- Interval Freq 0 - 9 6 10 - 19 12 20 - 29 16 30 - 39 11 40 - 49 5 Calculate the mean and standard deviation for the table of sample data above.Tornadoes During a recent 64-year period, New Mexico had a total of 153 tornadoes that measured 1 or greater on the Fujita scale. Let the random variable x represent the number of such tornadoes to hit New Mexico in one year, and assume that it has a Poisson distribution. What is the mean number of such New Mexico tornadoes in one year? What is the standard deviation? What is the variance?minor mode 5,4,4,4,4,3,3,3,2,2,2,2, 11| 40 8 12 number 11 is 2 and 4 A sample of scores has a mean of M=20,à median of 28, and a mode of 29. What is the most likely shape for the sample distribution
- Part ePlease help me!! this is all one question and I am required to submit it as whole!! i promise to rate it but please help me The age distribution of the Canadian population and the age distribution of a random sample of 455 residents in the Indian community of a village are shown below. Age (years) Percent of Canadian Population Observed Numberin the Village Under 5 7.2% 51 5 to 14 13.6% 78 15 to 64 67.1% 280 65 and older 12.1% 46 Use a 5% level of significance to test the claim that the age distribution of the general Canadian population fits the age distribution of the residents of Red Lake Village. (a) What is the level of significance?State the null and alternate hypotheses. H0: The distributions are the same.H1: The distributions are different.H0: The distributions are the same.H1: The distributions are the same. H0: The distributions are…21