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Janet's math test consists of 20 problems. For every correctly solved problem,sherecieves 8 points. For every inccorectly solved problem, she subtracts 5 points.For every problem that she skips, she recieves 0 points. Janet earned 13 points onthe test. How many problems did Janet try and solve? Explain
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4 months ago
Corbin’s parents want to save $50,000 for his college education and already have $25,000. About how long would it take them to double their current savings if they can earn an 8% interest rate?
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4 months ago
A random sample of 10 shipments of stick-on labels showed the following order sizes.10,520 56,910 52,454 17,902 25,914 56,607 21,861 25,039 25,983 46,929PictureClick here for the Excel Data File(a) Construct a 95 percent confidence interval for the true mean order size. (Round your answers to the nearest whole number.) The 95 percent confidence interval to
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4 months ago
NEED HELP ASAP!!!thank you.
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4 months ago
Over the course of a year, a company goes from 115 employees to 124 employees.Use the drop-down menus to build an equation that could be used to find the percent change, p, in the number of employees
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4 months ago
20 points , will mark brainiest :)
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4 months ago
PLZ HURRY IT'S URGENT!!f the chance of rain for tomorrow is 40%, what is the chance that it will NOT rain?Note: You can choose more than one answer.40%10%60%100%
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4 months ago
If [tex]x-12\sqrt{x} +36=0[/tex], what is the value of x?A. [tex]6[/tex]B. [tex]6^{2}[/tex]C. [tex]6^{3}[/tex]D. [tex]6^{4}[/tex]
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4 months ago
please someone help!
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4 months ago
A recent survey showed that in a sample of 100 elementary school teachers, 15 were single. In a sample of 180 high school teachers, 36 were single. Is the proportion of high school teachers who were single greater than the proportion of elementary teachers who were single? Use α = 0.01.
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4 months ago
Confidence Interval and Hypothesis Test on the Proportion 1. A composites manufacturer is having serious problems with porosity in their parts. A Quality Engineer samples 300 parts and finds 58 defective. (a) Test the hypothesis that defective rate (proportion defective) exceeds 15%. Test at α = 0.05. What is the parameter of interest? What assumptions are made? Show mathematical evidence to support assumption.
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4 months ago
An airplane with room for 100 passengers has a total baggage limit of 6000 lb. Suppose that the total weight of the baggage checked by an individual passenger is a random variable x with a mean value of 49 lb and a standard deviation of 18 lb. If 100 passengers will board a flight, what is the approximate probability that the total weight of their baggage will exceed the limit? (Hint: With n = 100, the total weight exceeds the limit when the average weight x exceeds 6000/100.) (Round your answer to four decimal places.)
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4 months ago
Statistics can help decide the authorship of literary works. Sonnets by a certain Elizabethan poet are known to contain an average of μ = 8.9 new words (words not used in the poet’s other works). The standard deviation of the number of new words is σ = 2.5. Now a manuscript with six new sonnets has come to light, and scholars are debating whether it is the poet’s work. The new sonnets contain an average of x~ = 10.2 words not used in the poet’s known works. We expect poems by another author to contain more new words, so to see if we have evidence that the new sonnets are not by our poet we test the following hypotheses.H0 : µ = 8.88 vs Ha : µ > 8.88Give the z test statistic and its P-value. What do you conclude about the authorship of the new poems? (Let a = .05.)Use 2 decimal places for the z-score and 4 for the p-value.a. What is z?b.The p-value is greater than?c.What is the conclusion? A)The sonnets were written by another poet or b) There is not enough evidence to reject the null.
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4 months ago
Mary's family went to Disneyland. Her mom drove 75 miles an hour and her dad drove 60 miles an hour. If they drove for a total of 1710 miles, how many hours did each one of the drive?
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4 months ago
come quic 5 qts .. pics provided !! answer correctly plz!!
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4 months ago
A package holds 30 batteries.How many batteries are in 14 packages
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4 months ago
2y=5x+1Not a direct variationDirect variation, constant of variation is -Direct variation, constant of variation isDirect variation, constant of variation is 1--
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4 months ago
Explain to your classmates the purpose of a critical value. What is it used for? Also, explain the difference in a one-tail test and two-tailed test. What causes these to be different and where would you use a one-tail test instead of a two-tailed test? Significance leads to the importance of testing. What is the purpose of the null hypothesis? What is the purpose of the alternative hypothesis? Explain what inferences or decisions you are able to make and not make from the tes
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4 months ago
For each year t, the population of a forest of trees is represented by the function A(t)= 115(1.025)^t. In a neighboring forest, the population of the same type of tree is represented by the function B(t)=82(1.029)^t. Assuming the population growth models continue to represent the growth of the forests, which forest will have a greater number of trees after 100 years? By how many?
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4 months ago
State DMV records indicate that of all vehicles undergoing emissions testing during the previous year, 70% passed on the first try. A random sample of 200 cars tested in a particular county during the current year yields 124 that passed on the initial test. Does this suggest that the true proportion for this county during the current year differs from the previous statewide proportion? Test the relevant hypotheses using a ¼ .05.
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4 months ago
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