Based on the frequency distribution above, find the relative frequency for the class with lower class limit 15
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| Ages | Number of students |
|---|---|
| 15-18 | 6 |
| 19-22 | 5 |
| 23-26 | 7 |
| 27-30 | 8 |
| 31-34 | 9 |
| 35-38 | 5 |
Based on the frequency distribution above, find the relative frequency for the class with lower class limit 15
Relative Frequency = %
Give your answer as a percent, rounded to one decimal place
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- random sample of 16 subjects The ages were: Assuming that age is normally distributed in the population, can we conclude that the mean age of the population is less than 60 years? Let α = 0.05.The age of children in kindergarten on the first day of school is uniformly distributed between 4.88 and 5.94 years old. A first time kindergarten child is selected at random. Round answers to 4 decimal places if possible. If such a child is at the 87th percentile, how old is that child? ____ years old..59. Potatoes. A high-quality product is one that is consistent and has very little variability in its characteristics. Controlling variability can be more difficult with agricultural products than with those that are manufactured. The following table gives the weights, in ounces, of the 25 potatoes sold in a 10-pound bag. (a) Summarize the data graphically and numerically. Give reasons for the methods you chose to use in your summaries. (b) Do you think that your numerical summaries do an effective job of describing these data? Why or why not? (c) There appear to be two distinct clusters of weights for these potatoes. Divide the sample into two subsamples based on the clustering. Give the mean and standard deviation for each subsample. Do you think that this way of summarizing these data is better than a numerical summary that uses all the data as a single sample? Give a reason for your answer.
- 1. Find the area of the shaded region. The graph to the right depicts IQ scores of adults, and those scores are normally distributed with a mean of 100 and a standard deviation of 15. 75 A graph with a bell-shaped curve, divided into 2 regions by a vertical line. The vertical line extends from the bell curve to the x-axis, and is located on the left half, under the curve. The region on the left of this line is shaded. The x-axis below the vertical line is labeled 75. Question content area bottom The area of the shaded region is enter your response here (Round to four decimal places as needed.) 2. Find the area of the shaded region. The graph to the right depicts IQ scores of adults, and those scores are normally distributed with a mean of 100 and a standard deviation of 15. 83 A symmetric bell-shaped curve is plotted over a horizontal scale. A vertical line runs from the…distribution of candidates who were enrolled for the mba entrace exam and the candidates (out of those enrolled) who passed the exam in different institutes CANDIDATES ENROLLED =8550 X-16%, P- 22%, Q-15%, R-10%, S-17%, T-8%, V-12% CANDIDATES PASSED= 5700 X- 12%, P-18%, Q-17%, R-13%, S-16%, T-9%, V-15% a) What percentage of candidates passed the Exam from institute T out of the total number ofcandidates enrolled from the same institute?b) Which institute has the highest percentage of candidates that passed to the candidates enrolled?c) By how many candidates, does the number who passed institutes S and P together exceeds thenumber of candidates enrolled from institutes T and R together?Categorical and Frequency Distribution
- distribution of candidates who were enrolled for the mba entrace exam and the candidates (out of those enrolled) who passed the exam in different institutes CANDIDATES ENROLLED =8550 X-16%, P- 22%, Q-15%, R-10%, S-17%, T-8%, V-12% CANDIDATES PASSED= 5700 X- 12%, P-18%, Q-17%, R-13%, S-16%, T-9%, V-15% a) What is the percentage of candidates passed to the candidates enrolled for institutes Q and Rtogether?b) What is the ratio of candidates passed to the candidates enrolled from institute P?c)What makes the candidate fail the exam?Using 68-95-99.7% rule to indicate quantities In a study of facial behavior, people in the control group are timed for eye contact in a 5-minute period. Their times are normally distributed with a mean of 183.0 seconds and a standard of 55.0 seconds. What percent of times will between 73 and 293 seconds? what percent of times will be over 238 seconds? Suppose that 800 people were assigned to this control group. How many people will be with time over 238?Your hypothesis test for a proportion has a right-tailed critical region. The test statistic is zz = 1.84. Find the p-value accurate to 2 decimal places.
- Total plasma volume is important in determining the required plasma component in blood replacement therapy for a person undergoing surgery. Plasma volume is influenced by the overall health and physical activity of an individual. Suppose that a random sample of 42 male firefighters are tested and that they have a plasma volume sample mean of x = 37.5 ml/kg (milliliters plasma per kilogram body weight). Assume that σ = 8.00 ml/kg for the distribution of blood plasma. What conditions are necessary for your calculations? (Select all that apply.) σ is known the distribution of weights is norma lσ is unknown n is large the distribution of weights is uniformA uniform distribution has a minimum of six and a maximum of ten. A sample of 50 is taken.Find the 70th percentile for the sums. (Round your answer to two decimal places.) How is the central limit theorem for sums z-score formula used to find the percentile?The distribution obtained by a simple process of successive addition of the entries in the frequency column. A. relative frequency B. cumulative frequency C. frequency D. cumulative percentage