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Questions in Grade College

[Done] Select the correct answer from each drop-down menu to complete the statements about the nature of scientific knowledge. Among the different types of scientific knowledge, __________ are likely to be modified or discarded most frequently. In the 1600s, scientists discarded the phlogiston theory because __________.

[Done] Evaluate the expression. $-0.4-0.5--0.7 \div-7$ Write your answer as an integer or a decimal. Do not round.

[Done] Hector guesses on each question of a 35 question multiple choice test. Each question has 5 possible responses. What are the mean and standard deviation of the number of questions that Hector will guess correctly? Mean = S.D. = [$\square$] Round to the nearest hundredth. Each guess is independent of the other guesses.

[Done] How does the first paragraph of The Dark Game best support the central idea that the Civil War was a long war? A. It shares the detail that the war lasted four years. B. It states what people believed about the war at the time. C. It tells how many soldiers actually died in the war. D. It gives an example of a battle that lasted almost two days.

[Done] A researcher wants to investigate the effect of education level on women's incomes. A simple random sample of working women aged between 30 and 50 was selected from each of three education categories. The women's annual incomes (in thousands of dollars) were recorded. The results are as follows: | | High School | |------------|-------------| | | 49 | | | 31 | | | 35 | | | 42 | | | 33 | | | 37 | | | 48 | | | 45 | | | College | |---------|---------| | | 36 | | | 85 | | | 28 | | | 32 | | | 44 | | | 63 | | | 46 | | | 42 | | | Advanced Degree | |-----------------|-----------------| | | 58 | | | 63 | | | 52 | | | 31 | | | 30 | | | 99 | | | 112 | | | 96 | Test the claim that the three different samples come from populations with the same mean. Use a significance level of 0.01. Assume that incomes are normally distributed. 1. Complete the populations, null and researcher's hypothesis Population 1: The set of all $\square$ incomes from women with $\square$ a high school diploma Population 2: The set of all $\square$ incomes from women with $\square$ a college degree Population 3: The set of all $\square$ incomes from women with $\square$ an advanced degree $H _0$ : $\square$ $\square$ $\square$ $\square$ $\square$ $H _r$ : $\square$ $\square$ $\square$ $\square$ $\square$ 2. Which test would you use to verify the requirements? $\square$ X is normally distributed Has the requirements of the test met? $\square$ Yes What is the sampling distribution? $\square$ F distribution 3. Determine the cutoff score, (critical value) for significance. $\square$ 6.3589 4. Fill in the blank for the necessary statistics to test the claim. Round $x$ and $s^2$ to twice as many as one more decimal place as your data. | | High School | College | Advanced Degree | |------|-------------|---------|-----------------| | n | 6 | $6$ | 6 | | $x$ | 42.17 | 40.33 | 68.67 | | $s^2$ | 46.17 | 134.67 | 893.47 | 5. Determine the standardized sample score (from the sample taken). Round your answer to four decimal places. Include trailing zeros as needed. $\square$ 4.2122 6. Determine the p-value from the standardized sample score. Round your answer to four decimal places. Include trailing zeros as needed. $\square$ 0.0353 7. Make your decision to reject or fail to reject the null hypothesis. $\square$ fail to reject

[Done] Simplify. Write your response in $a+b i$ form. $10 i(-7+17 i)=$

[Done] Select the correct answer. Simon used these steps to solve an equation: Step 1: $-6(x+7)=2(x-11)$ Step 2: $-6 x-42=2 x-22$ Step 3: $-8 x-42=-22$ Step 4: $-8 x=20$ Which property did he use to get from step 3 to step $4 ?$ A. addition property of equality B. distributive property C. subtraction property of equality D. transitive property

[Done] What is a pinch point? A. Occurs when a hand tool is operated incorrectly B. Is an area on a machine prone to malfunction C. Occurs where machine parts are moving in opposite directions D. Is a place between a moving machine part and a stationary one

[Done] Graph the following pair of quadratic functions and describe any similarities/differences observed in the graphs. [tex] \begin{array}{l} f(x)=2 x^2 \\ g(x)=-2 x^2 \end{array} [/tex] a. [tex]$f$[/tex] opens downward; [tex]$g$[/tex] opens upward; both pass through different [tex]$y$[/tex]-intercepts b. both open downward; both pass through [tex]$(0,0)$[/tex] c. both open upward; both pass through different [tex]$y$[/tex]-intercepts d. [tex]$f$[/tex] opens upward; [tex]$g$[/tex] opens downward; both pass through [tex]$(0,0)$[/tex] Please select the best answer from the choices provided

[Done] The coiled tubular structures arising from the dermis that excrete sweat are the: A. sebaceous glands B. holocrine glands C. merocrine glands D. sudoriferous glands