The rectangles of a histogram is proportional to O Cumulative frequencies of the distribution O Midpoints of the distribution O Class boundaries of the distribution OFrequencies of the distribution
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- 4. Which proportion of a normal distribution is located between the mean and z = +1.40? 5. A vertical line drawn through a normal distribution at z = +2.11 separates the distribution into two sections, the body and the tail. Which proportion of the distribution is in the tail?Must the variable under consideration be normally distributed for you to use the ?-interval procedure or ?-interval procedure? Explain your answer.The following frequency table shows the number of fires per month in a city. Complete the table entries to find the mean and standard deviation for this distribution. E Click the icon to view the table. Complete the table below. More Info (Type integers or decimals rounded to three decimal places as needed.) 21 Product, Number, Frequency, Product, Deviation, Deviation 2 2 (x-x) (x-x)²•f 21 f (x•f) (x-x)² Number, Frequency, Product, f Deviation, Deviation (x•f) (x-x) (x-x)² X-X 2 X-X 4. 3 1 6. 0. Ex-73D Print Done Help me solve this View an example Get more help - 99+
- Students in a statistics course take their first exam and the class gets μ = 75.75 and σ = 7.75. The distribution is normally distributed (bell curve shaped). The professor takes all the scores and turns them into z-scores. What is true of the new z-score distribution that the professor has made? Group of answer choicespoint(s) possible Assume that a randomly selected subject is given a bone density test. Those test scores are normally distributed with a mean of 0 and a standard deviation of 1. Dra graph and find the probability of a bone density test score less than 0. .. Sketch the region. Choose the correct graph below. O A. O B. OD. Q ^ A A 0 0 The probability is Round to four decimal places as needed.) tatcrunch CH W O C. √₁ √₁ T (1) MoreThe value for the range is determined by the extreme scores (both high and low) in the distribution O the extremely high scores in the distribution O the middle scores in the distribution O all of the scores in the distribution
- Can you please check my workA special bumper was installed on selected vehicles in a large fleet. The dollar cost of body repairs was recorded for all vehicles that were involved in accidents over a 1-year period. Those with the special bumper are the test group and the other vehicles are the control group, shown below. Each "repair incident" is defined as an invoice (which might include more than one separate type of damage). Statistic Test Group Control Group Mean Damage x¯1x¯1 = $ 1,101 x¯2x¯2 = $ 1,766 Sample Standard Deviation s1 = $ 696 s2 = $ 838 Repair Incidents n1 = 12 n2 = 9 (a) Construct a 90 percent confidence interval for the true difference of the means assuming equal variances. (Round answers to 3 decimal places. Negative values should be indicated by a minus sign.) (b) Repeat part (a), using the assumption of unequal variances with Welch's formula for d.f. (Round answers to 2 decimal places. Negative values should be indicated by a minus sign.) (d) Construct separate…Complete the table with the assumption that the mean falls on the 75-79 interval
