Find the equation of the regression line for the data based on time spend for studying and current CGPA
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Find the equation of the regression line for the data based on time spend for
studying and current CGPA
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- A electronics retailer list the sales (in thousands) of certain products in three cities for the prior quarter. During that period tablets sold for $241, laptops sold for $505, cell phones sold for $437, and DVR sold for $1,564. City 1 City 2 City 3 Tablets 4444 5757 3939 Laptop Computers 6464 7777 6868 Cell Phones 3131 5353 6969 Personal DVR 3030 7676 5454 City 1's total sales : City 2's total sales : City 3's total sales :The table below contains the total cost ($) for four tickets to a basketball game purchased on the secondary market, two beers, two soft drinks, two hot dogs, and one parking space at each arena during a recent season. 298.97364.59427.79213.23307.54531.23297.49302.56521.19291.69366.83532.67230.38320.12507.88212.87452.34656.21245.26436.92709.57220.91485.82727.63365.07487.58788.14360.31467.92886.93 a. Organize these costs as an ordered array. b. Construct a frequency distribution and a percentage distribution for these costs. c. Around what values, if any, are at least 75% of the costs of attending the game concentrated? Explain.The quality department at an electronics company has noted that, historically, 91% of the units of a specific product pass a test operation, 6% fail the test but are able to be repaired, and 3% fail the test and need to be scrapped. Due to recent process improvements, the quality department would like to test if the rates have changed. A recent sample of 500 parts revealed that 473 parts passed the test, 20 parts failed the test but were repairable, and 7 parts failed the test and were scrapped. (You may find it useful to reference the appropriate table: chi-square table or table)a. Choose the appropriate alternative hypothesis for the test.
- A study found that among the 2300 college students who drank energy drinks daily 850 of them binge drank alcohol on a monthly basis. In contrast, 240 of the 1387 students who do not drink energy drinks daily binge drank alcohol monthly. Fill in the contingency table and determine the percentage of college students who drink energy drinks daily among those who DO NOT binge on alcohol. Binge Drink Alcohol Don't Binge Drink Alcohol Total Drinks Energy Drink 850 1450 2300 Does not Drink Energy Drink 240 1147 1387 Total 1090 2597 3687Globally, 35% of all ridged brittleshell tortoises have spots on their shells. A herpetologist in Citition collects a sample of 38 ridged brittlesell tortoises and finds that 16 of them have spots on their shells. The herpetologist would like to test the claim that the proportion of ridged brittleshell tortoises in Cititon with spots on their shells is greater than 35%. The herpetologist ends up rejecting the null hypothesis. If the actual proportion of ridged brittleshell tortoises in Cititon with spots on their shells is 41%, then what type of error, if any, has occurred? In the problem above, what is the test statistic?In 20162016, the Chicago Cubs defeated the Cleveland Indians to become the champions of Major League Baseball. Following are the salaries, in millions of dollars, of the players on each of these teams. Cubs20.0012.009.508.808.057.755.695.293.632.672.532.512.500.650.540.530.530.520.520.520.510.510.510.510.51Cubs20.005.290.540.5112.003.630.530.519.502.670.530.518.802.530.520.518.052.510.527.752.500.525.690.650.51
- A music professor offers his 40 students the option of coming to an additional rehearsal session theweek before their juries (musical final exams.) In order to decide whether these extra sessions actuallyhelp students, he keeps track of who attends them and compares their jury scores to those of students who did not schedule extra sessions. In this study, a difference was found between the scores of students who scheduled the extra sessions and those of students who didn't attend(higher average for students with extra sessions) A) Yes, becuase the study relied on a common final exam fro everyone B)No, because the students chose whether they attended the review session or not C) Yes becuase the study included both students who attned the review session and those who did not D)Yes, becuase the number of subjects in the study was large E)No, becuase the students in the study were not blindedHigh school seniors with strong academic records apply to the nation’s mostselective colleges in greater numbers each year. Because the number of slotsremains relatively stable, some colleges reject more early applicants. Suppose thatfor a recent admissions class, an Ivy League college received 2851 applications forearly admission. Of this group, it admitted 1033 students early, rejected 854outright, and deferred 964 to the regular admission pool for further consideration.In the past, this school has admitted 18% of the deferred early admission applicantsduring the regular admission process. Counting the students admitted early andthe students admitted during the regular admission process, the total class sizewas 2375. Let ?, ?, and ? represent the events that a student who applies for earlyadmission is admitted early, rejected outright, or deferred to the regularadmissions pool.a. Are events E and D mutually exclusive? Find (? ∩ ?)b. Suppose a student applies for early admission. What…High school seniors with strong academic records apply to the nation's most selective colleges in greater numbers each year. Because the number of slots remains relatively stable, some colleges reject more early applicants. Suppose that for a recent admissions class, an Ivy League college received 2851applications for early admission. Of this group, it admitted 1033 students early, rejected 854 outright, and deferred 964 to the regular admission pool for further consideration. In the past, this school has admitted 18% of the deferred early admission applicants during the regular admission process. Counting the students admitted early and the students admitted during the regular admission process, the total class size was 2375. Let E, R, and D represent the events that a student who applies for early admission is admitted early, rejected outright, or deferred to the regular admissions pool. a. Use the data to estimate P( E), P(R), and P( D). b. Are events E and D mutually exclusive?…
- A college finds that 12% of students have taken a distance learning class, 24% of students arepart-time students, and of the part-time students, 25% have taken a distance learning class.(a) What percentage of students are both part-time and have taken a distance learning class?(b) What percentage of the students who have taken a distance learning class are part-time?Slamet is a young entrepreneur who started his business by opening 5 “Bebek Mas Slamet” restaurants in different locations, namely in Blok S, Blok M, Blok A, Senayan, and Depok areas. Because it is still in its infancy, Slamet still frequently observes data on the number of sales portions of Fried Duck which is the mainstay of the restaurant "Bebek Mas Slamet". The following data shows the total sales of Bebek Goreng for the last two days for the time of day, afternoon, and evening that Slamet is observing from the four restaurant locations Penjualan Siang Sore Malam Blok S 40 41 30 32 43 43 Blok M 36 40 35 33 45 46 Blok A 40 45 39 48 46 50 Senayan 34 37 36 35 45 44 Depok 36 40 37 34 47 48 Help Slamet to analyze the data on the sales of fried duck over the past two days by answering some of the questions in this question. Some of the results of the calculation of the sum of squares…The annual salary for a sample of U.S. governors in 2017 are as follows: $120395, $177467, $130273, $139339, $177412, $99636, $150000, $159300, $123427, $108167, $149730, $110834, $105000, $142265, $148886, $98600, $106078, $109470, $160135, $175000, $150000, $105000. 1. Find the mean and the standard deviation for the sample of annual salaries. 2. What is the associated t - score for a 99% confidence level? 3. What is the margin of error for a confidence level of 99%? 4. Find a 99% confidence interval for the mean salary of U.S. governors in 2017. Assume the data is normally distributed.