The following distribution has O a positive skew. 2 a negative skew. 3 no skew.
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- Describe the shape of the distribution. OA. It is skewed. O B. It is bimodal. O C. It is symmetric. O D. It is uniform.need help with B, C, DA variable of a population has a left-skewed distribution. a. If a large simple random sample is taken from the population, roughly what shape will the distribution of the sample have? Explain your answer.b. If two simple random samples are taken from the population, would you expect the two sample distributions to have identical shapes? Explain your answer.c. If two simple random samples are taken from the population, would you expect the two sample distributions to have similar shapes? If so, what shape would that be? Explain your answers.
- 4. Find each value requested for the distribution of scores in the following table. а. п b. ΣΧ C. Σχ f 1 4 2 3 3 2 5 1 3 UNGder Describe the shape of the distribution. OA. The distribution is uniform. O B. The distribution is skewed to the right. OC. The distribution is skewed to the left. OD. The distribution is bell shaped.NEED HELP WITH: E,F,G
- Students in an experimental psychology class did research on depression as a sign of stress. A test was administered to a sample of 30 students. The scores are given. Complete parts (a) through (c) below. 36 52 44 57 16 12 23 42 25 33 32 49 12 58 42 38 21 38 35 24 39 43 56 24 45 21 35 32 36 12 ..... (a) Find the mean and median of the data The mean is (Round to three decimal places as needed.) The median is (Type an integer or a decimal.) (b) Draw a stem-and-leaf plot for the data using one row per stem. Which stem-and-leaf plot below shows the data? O A. 1 59 O B. 1122456689 213456 3 25 4 22359 5 222346788 OC. 1 2234679 2 222345689 3 1224568 4 1358 5 56 O D. 12226 2113445 3 223556688 21359 3 1224588 4 222345678 4223459 5/22234666 5 2678 5 (c) Describe the shape of the distribution. Which description below best describes the shape of the distribution?The average final exam score for the statistics course is 82%. A professor wants to see if the average final exam score for students who are given colored pens on the first day of class is different. The final exam scores for the 14 randomly selected students who were given the colored pens are shown below. Assume that the distribution of the population is normal. 90, 78, 82, 59, 67, 71, 64, 78, 67, 57, 79, 86, 66, 56 What can be concluded at the the αα = 0.05 level of significance level of significance? For this study, we should use (t-test for a population mean, z-test for a population proportion) The null and alternative hypotheses would be: H0: (symbol) (symbol) ____ H1: (symbol) (symbol) ____ The test statistic (?,t,z) = ____ (please show your answer to 3 decimal places.) The p-value = (Please show your answer to 4 decimal places.) The p-value is (symbol) αα Based on this, we should (accept, reject, fail to reject) the null hypothesis.…The lengths of adult males' hands are normally distributed with mean 193 mm and standard deviation is 7.2 mm. Suppose that 45 individuals are randomly chosen. Round all answers to 4 where possible.
