1. Determine the size of the following matrices: [3 -1 0 6 B= 2 7 5 -2 [1 0 -3 9 Го 1 47 A= |-3 2 1 2. Use the matrix B from problem #2 to find b = b, = 3. Solve the system algebraically using the augmented matrix method. Show all solution steps: 3x+9y =9 x+4y=5
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A: i just solved the coressponding system
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- A researcher decides to follow a group of 8 individuals taking a specific anti-TNF drug used to treat inflammatory conditions over an 8-year period of time in a study to determine how many of them will develop an immunity to the drug and at what point in time each individual will develop an immunity to the drug. What proportion of individuals did not develop an immunity to the anti-TNF drug during the 8 years they were tracked throughout the study, assuming the study concluded at the 8-year point?People come to relationships with different attachment styles that partially stem from the attachments they experienced with the adults raising them and partially due to experiences in other relationships in their lives. Those who have what is known as “secure” attachments are comfortable with their partners emotions, can help soothe, and make movements towards the other person in a responsive way. Among a group of 10 individuals rated as having a secure attachment style, a researcher wanted to know if, as they were first being acquainted with another person, the amount of self-disclosure made them like their person more. The data is listed in Table 6 below. Test the hypothesis at an alpha of 0.05 (where increasing scores mean higher disclosure and higher liking). If you knew the new person you are about to go on a date with had a self-disclosure rating of 4, what would you predict your likeability score would be (provide the full regression formula as well as the response)? -use…People come to relationships with different attachment styles that partially stem from the attachments they experienced with the adults raising them and partially due to experiences in other relationships in their lives. Those who have what is known as “secure” attachments are comfortable with their partners emotions, can help soothe, and make movements towards the other person in a responsive way. Among a group of 10 individuals rated as having a secure attachment style, a researcher wanted to know if, as they were first being acquainted with another person, the amount of self-disclosure made them like their person more. The data is listed in Table 6 below. Test the hypothesis at an alpha of 0.05 (where increasing scores mean higher disclosure and higher liking). If you knew the new person you are about to go on a date with had a self-disclosure rating of 4, what would you predict your likeability score would be (provide the full regression formula as well as the response)? Table 6.…
- 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 44 57 39 Laptop Computers 64 77 68 Cell Phones 31 53 69 Personal DVR 30 76 54 City 1's total sales : City 2's total sales : City 3's total sales :Equip male and female students with a small device that secretly records sound for a random 30 seconds during each 12.5-minute period over two days. Count the words each subject speaks during each recording period, and from this, estimate how many words per day each subject speaks. The published report includes a table summarizing six such studies.12 Here are two of the six: Readers are supposed to understand that, for example, the 56 women in the first study had x 16,177 and s 7520. It is commonly thought that women talk more than men. Does either of the two samples support this idea? For each study: (a) State hypotheses in terms of the population means for men (M) and women (F). (b) Find the two-sample t statistic. (c) What degrees of freedom does Option 2 use to get a conservative P-value? (d) Compare your value of t with the critical values in Table C. What can you say about the P-value of the test? (e) What do you conclude from the results of these two studies?According to one survey taken a few years ago, 32% of American households have attempted to reduce their long-distance phone bills by switching long-distance companies. Suppose that business researchers want to test to determine if this figure is still accurate today by taking a new survey of 95 American households who have tried to reduce their long-distance bills. Suppose further that of these 95 households, 24% say they have tried to reduce their bills by switching long-distance companies. Is this result enough evidence to state that a significantly different proportion of American households are trying to reduce long-distance bills by switching companies? Let α = .01. Appendix A Statistical Tables (Round your answer to 2 decimal places.) The value of the test statistic is enter the value of the test statistic and we choose between reject and fail to reject the null hypothesis . Save for Later…
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- The process by which a single species splits into two species is still not well understood. One hypothesis is that in species in which female mate more than once would be more prone to associate with sexual conflict and this conflict can lead to speciation. Research identified 25 insect groups (Taxon pair), in which one group the female mate multiple times, and the other closely related group the female only mate once. The results can be found in the table below. Number of species Taxon pair Multiple-mating group Single-mating group Difference Above (+) or below (-) zero A 53 10 43 + B 73 120 -47 - C 228 74 154 + D 353 289 64 + E 157 30 127 + F 300 4 296 + G 34 18 16 + H 3400 3500 -100 - I 20 1000 -980 - J 196 486 -290 - K 1750 660 1090 + L 55 63 -8 - M 37 115 -78 - N 100 30 70 + O 21000…Data from the Bureau of Labor Statistics indicates that in a certain month, 36.8% of the labor force had a high school diploma or fewer years of education, 29.9% had some college or an associate's degree, and 33.3% had a bachelor's degree or more education. Of those with a high school diploma or fewer years of education, 6.8%were unemployed. Of those with some college or an associate's degree, 4.7% were unemployed, and of those with a bachelor's degree or more education, 2.9%were unemployed. Find the probability that a randomly chosen labor force participant has some college or an associate's degree given that he or she is unemployed.Data from the Bureau of Labor Statistics indicates that in a certain month, 39.9% of the labor force had a high school diploma or fewer years of education, 29.6% had some college or an associate's degree, and 38.5% had a bachelor's degree or more education. Of those with a high school diploma or fewer years of education, 7.6% were unemployed of those with some college or an associate's degree, 3.2% were unemployed and those with a bachelor's degree or more education, 2.3% were unemployed find the probability that a randomly-chosen labor force participation have some college rent associates degree given that he or she is employed.