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The table below shows a stem-and-leaf diagram for the test scores of students in Liberal Arts Math. Stems 56 78 7 9 Leaves 78 3478 034459 002257 56 How many students took the test? What is the lowest score on the test?

Solve calculation

The height (in inches) of a random sample of 28 players in NCAA Division 1 basketball teams is shown to the left.    x 75 80 75 87 77 77 67 83 77 80 73 82 73 71 80 76 72 78 68 74 74 72 76 86 77 77 78   8 Sum of deviations:  ∑(x − x̅) = _______ a -0.5       b 0       c 0.5       d 1

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Question: It is known that the mean diameters of rivets produced by two firms A and B are practically the same but the standard deviations may differ. For 22 rivets produced by firm A, the standard deviation is 2.9 mm. while for 16 rivets manufactured by firm B, the standard deviation is 3-8 mm. Compute the statistic would use to test whether the you products of firm A have the same variability as those of firm B and test its significance?

QDX= -2PX + 0,5PY - 0,2PZ + 1,2I determine the relationship between two products X and Y

The results of a "check all that apply" question is best displayed as a pie chart. True False

You have been driving for about 3 hours early in the morning which of the following indicates that you might be fat

QUESTION 28 "For a population with a mean = 440 and a standard deviation = 110, what is the X value corresponding to z = 2.67? (Be sure to round answer to the second decimal place)."

It is known that The New York Times’ circulation is 731,500 print copies. You publish three advertisements in the NYT a week and run your campaign for 12 weeks. What are the total audience impressions (TAI) you can get over the period of 12 weeks?

Zip Code, Age and Number of Dogs by Person in Petland Person Zip Code Number Age of Dogs Ann 402 20 0 Bill 805 35 55 2 Carmelo 805 40 5 Dan 402 50 1 Eric 402 20 20 Ferdinand 402 35 55 3 3 Gert 402 20 2 Homer 402 20 0 In-choi 805 100 3 Jimmy 805 60 1

The average marks on an Economics Assignment is 55%, with a standard deviation of 5%. The Examiners note that the distribution of the marks is normal. A. Define 'Normal Distribution' including key properties and illustrate with a diagram.  What is the proportion of frequencies below 35%?  What is the proportion of frequencies above 80%?  What is the proportion of marks between 40% and 70% ?

The annual salary of the staff members in a state government agency are shown here.  The first column shows the annual salary (S) and the second column the frequency (the number of employees earning that salary) labeled F.     The mean salary of agency's staff is:             S F $120,000 1 91,000 2 86,000 4 65,000 10 57,500 24 44,000 10 a $61,098 b $60,195 c $59,306 d $58,429

not use ai please

The height (in inches) of a random sample of players in NCAA Division 1 basketball teams is shown to the left.    x 75 80 75 87 77 77 67 83 77 80 73 82 73 71 80 76 72 78 68 74 74 72 76 86 77 77 78   9 Sum of squared deviations:  ∑(x − x̅)² = _______. a 555.83         b 573.02         c 590.74         d 609.01

Could you help me with this homework question? I got an answer of 22.9

In a sample of 20 students, 7 are economics majors, 4 are psychology majors, 6 are math majors and 3 are English majors. What is the relative frequency of English majors? Group of answer choices 0.20 3 4 0.15 thanks

In your own words, describe what the difference is between an error term and a residual. How does sample size affect the variance of each?

Consider the following data: −9,13,−14,−14,−9,−14,−9−9,13,−14,−14,−9,−14,−9 Copy Data Step 3 of 3:  Calculate the value of the range.

2. A city had an unemployment rate of 7%. The mayor pledged to lower this figure and supported programs to decrease unemployment. A group of citizens wanted to test with 0.032 label of significance if the unemployment rate had actually decreased, so they obtained a random sample of 500 citizens to see what proportion of the sample was unemployed. Only 32 citizens in the above sample is still unemployed. What is the probability of Type II error if the actual unemployment rate is 6.5% please don't use software everything needs to be done by hand. Explain because I don't understand my professor. Note:- Do not provide handwritten solution. Maintain accuracy and quality in your answer. Take care of plagiarism. Answer completely. You will get up vote for sure.

Bill's Bookstore is tracking its monthly demand for textbooks and has seen the following demand pattern. Historical forecasts are also included. MONTH FORECASTED DEMAND ACTUAL DEMAND April 150 165 May 220 210 June 215 200 July 245 250 August 205 225 Assess Bill's performance for the forecast in the table above using the Mean Absolute Deviation (MAD). Only use the data for the months of April through August to calculate the MAD.

p The Graduate Management Admission Test (GMAT) is a standardized exam used by many universities as part of the assessment for admission to graduate study in business. The average GMAT score is 547 (Magoosh website). Assume that GMAT scores are bell-shaped with a standard deviation of 100. Use the empirical rule to answer the following. a. What percentage of GMAT scores are 647 or higher (to 1 decimal)? % b. What percentage of GMAT scores are 747 or higher (to 1 decimal)? c. What percentage of GMAT scores are between 447 and 547 (to 1 decimal)? d. What percentage of GMAT scores are between 347 and 647 (to 1 decimal)?

K The first statistics exam had a mean of 71 and a standard deviation of 15 points; the second had a mean of 82 and a standard deviation of 5 points. Anna scored a 84 on both tests. Megan scored 94 on the first exam and 74 on the second. They both totaled 168 points on the two exams, but Anna claims that her total is better. Explain. The total of Anna's z-scores is, which is greater than Megantotal of (Round to one decimal place as needed.)

FIVE. Which of the following is true about standard deviation?     The first step in calculating the standard deviation is calculating the square root.   The second step in calculating the standard deviation is to subtract each measurement from the intermediate value and then square that difference.   The last step in calculating the standard deviation is to sum the squared values and divide by the number of values minus one.   Standard deviation is a type of average where the positive and negative numbers sum to zero.   The amount of difference of the measurements from the central value is called the sample standard deviation.

Economic topic. Show your work A weighing machine without any display was used by an average of 320 persons a day with a standard deviation of 50 persons. When an attractive display was used on the machine, the average for 100 days increased by 15 persons. Can we say that the display did not help much? Use a level of significance of 0.05?

RDPct 13.5 8.4 10.5 9 9.2 9.7 6.6 10.6 10.1 7.1 8 7.9 6.8 9.5 8.1 13.5 9.9 6.9 7.5 11.1 8.2 8 7.7 7.4 6.5 9.5 8.2 6.9 7.2 8.2 9.6 7.2 8.8 11.3 8.5 9.4 10.5 6.9 6.5 7.5 7.1 13.2 7.7 5.9 5.2 5.6 11.7 6 7.8 6.5

A very small town has only 15 households and they have the following annual incomes: $52,000, $22,000, $92,000, $8,000, $118,000, $62,000, $38,000, $14,000, $132,000, $46,000, $26,000, $96,000, $54,000, $110,000, $80,000. Based on this information, answer the following: a) Calculate the share of total income received by each quintile of this income distribution. Show your work! b) Do the top and bottom quintiles in this distribution have a greater or larger share of total income than the top and bottom quintiles of the U.S. income distribution for 2011? Compared to the U.S. does this city have higher or lower income inequality? (In 2011, the bottom quintile of the income distribution received 3.2% of income and the top quintile, 51.14%)

Determine whether the following data could be represented in a histogram. If not, state your reasoning. Age Frequency 20-24 5 25-29 4 30-34 9 35-39 2 40-44 6

A company has determined that there are seven possible defects for one of its product lines. Construct a Pareto diagram for the following defect frequencies:Defect Code        FrequencyA                               10B                                70C                               15D                               90E                                 8F                                 4G                                3

(26) A company is interested in determining whether the average life of HP and Epson printers is different. A sample of HP and Epson printers result in the following: HP: average life-7 years Standard deviation -2 years n- 10 Epson: average life - 5.5 years Standard deviation -2.5 yearsn-8 At a-.05, is there a statistically significant difference between the longevity of the two brands of printers?

The reliability of an estimator is assessed in terms of its _____. Select one: a. mean  b. ease of computation c. coefficient of variation d. variance

Consider a very large number of students taking a college entrance exam such as the SAT. And suppose the mean score on the mathematics section of the SAT is 570 with a standard deviation of 40.a. Find the z-score for a student who scored 600.b. A student is told that his z-score on this test is -1.5. What was his actual SAT math score?