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Which of the following fitness scores is the highest relative score? a score of 38 on a test with a mean of 31 and a standard deviation of 5.8 a score of 1124 on a test with a mean of 1080 and a standard deviation of 67.7 a score of 4709 on a test with a mean of 3960 and a standard deviation of 557.1 All scores are relatively equal
General
3 months ago
Determine whether the graph is the graph of a function. A coordinate axis is drawn with a line crossing the x axis at negative two and the y axis at negative ten. Yes No
General
3 months ago
A high school counselor is interested in the percentage of students who will be going to college. She randomly picks 60 students and finds that 53 will be going to college. Use a 95% confidence level to find the population proportion. a) State the 95% confidence interval for population proportion. (Round to tenth of a percent) b) State the margin of error (Round to tenth of a percent)
General
3 months ago
A Department of Transportation report about air travel found that nationwide, 76% of all flights are on time. Base the following questions on 125 randomly selected flights. You may assume the only outcomes are that a flight is either late or is on time. (For all probabilities round to tenth of a percent ) a) How many flights would you expect to be late
General
3 months ago
A researcher wants to estimate the percent of the population that uses the radio to stay informed on local news issues. The researcher wants to estimate the population proportion with a 95% level of confidence. He estimates from previous studies that no more than 30% of the population stay informed on local issues through the radio. The researcher wants the estimate to have an error of no more than .03. The necessary sample size is at least _______.
General
3 months ago
A group consists of fivefive men and fivefive women. ThreeThree people are selected to attend a conference. a. In how many ways can threethree people be selected from this group of tenten? b. In how many ways can threethree women be selected from the fivefive women? c. Find the probability that the selected group will consist of all women.
General
3 months ago
A commonly used IQ test is scaled to have a mean of 100 and a standard deviation 15. A school counselor was curious about the average IQ of the students in her school and took a random sample of fifty students’ IQ scores. The average of these was 107.9. Find a 95% confidence interval for the student IQ in the school.
General
3 months ago
Graph the equations to solve the system y= -2x y= 3x + 5
General
3 months ago
A major retail clothing store is interested in estimating the difference in mean monthly purchases by customers who use the store's in-house credit card versus using a Visa, Mastercard, or one of the other major credit cards. To do this, it has randomly selected a sample of customers who have made one or more purchases with each of the types of credit cards. The following represents the results of the sampling:In-House Credit Card National Credit CardSample Size: 86 113Mean Monthly Purchases: $45.67 $39.87Standard Deviation: $10.90 $12.47Suppose that the managers wished to test whether there is a statistical difference in the mean monthly purchases by customers using the two types of credit cards, using a significance level of .05, what is the value of the test statistic assuming the standard deviations are known?z = 11.91z = 2.86t = 3.49z = 3.49
General
3 months ago
The difference of nine, and a number divided by four is 13.A. 9+* = 13;y= 16B. 9-* = 13;y= 16C.9-4 = 13;y=-16D. 2-9= 13,=
General
3 months ago
Let f(x) = |x| for all real numbers x. Write the formula for the function represented by the describedtransformation of the graph of y = f(x).b. First, a vertical stretch with scale factor 3 is performed, then a reflection over the xx-axis, then a translation left4 units, and finally a translation up 5 units.
General
3 months ago
what is 5/8x+4=3/8x+12
General
3 months ago
Tim deposits money in a certificate of deposit account. The balance (in dollars) in his account t years after makingthe deposit is given by T(t) = 1000(1.06)t for t ≥ 0a. Explain, in terms of the structure of the expression used to define T(t), why Tim’s balance can never be $999
General
3 months ago
Can anyone tell me the algorithm of Pi
General
3 months ago
The probability is 1% that an electrical connector that is kept dry fails during the warranty period of a portable computer. If the connector is ever wet, the probability of a failure during the warranty period is 5%. If 90% of the connectors are kept dry and 10% are wet, what proportion of connectors fail during the warranty period? Let: D = electrical connector is dry D' = electrical connector is not kept dry (i.e., is wet) F = connector fails during warranty period F' = connector does not fail during warranty period Match the correct probability description to each given probability value
General
3 months ago
Divide. −3/8÷−6/7 . plsssss help
General
3 months ago
The probability that a student has a Visa card (event V) is .63. The probability that a student has a MasterCard (event M) is .11. The probability that a student has both cards is .03. (a) Find the probability that a student has either a Visa card or a MasterCard. (Round your answer to 2 decimal places.) Probability .77 .77 Incorrect (b) In this problem, are V and M independent
General
3 months ago
Toby goes on holiday to Geneva, Switzerland. In Geneva, Toby sees a watch costing 193.75 CHF (swiss france). In Manchester, an identical watch costs 145 pounds. Given that 1 pound= 1.55 CHF
General
3 months ago
The solution to a system of linear equations is (-3,-3) Which system of linear equations has this point as its solution? x -5y=-12 and 3x +2y=-15 x -5y=-12 and 3x +2y=15 x -5y=12 and 3x +2y=-15x -5y=12 and 3x +2y=15
General
3 months ago
A survey of 500 high school students was taken to determine their favorite chocolate candy. Of the 500 students surveyed, 149 like Snickers, 186 like Twix, 134 like Reese's Peanut Butter Cups, 70 like Snickers and Twix, 82 like Twix and Reese's Peanut Butter Cups, 31 like Snickers and Reese's Peanut Butter Cups, and 19 like all three kinds of chocolate candy. How many students like Reese's Peanut Butter Cups or Snickers, but not Twix?
General
3 months ago
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