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A machine is shut down for repairs if a random sample of 100 items selected from the daily output of the machine reveals at least 15% defectives. (Assume that the daily output is a large number of items.) If on a given day the machine is producing only 10% defective items, what is the probability that it will be shut down? [Hint: Use the .5 continuity correction.]
General
6 months ago
The velocity-time graph for a two-stage rocket is shown below. Use the graph and your understanding and of slope calculations to determine the acceleration of the rocket during the following time interval.
General
6 months ago
Last Thursday, John assembled chairs at a rate of 3 chairs per hour for part of the day and Larry assembled no chairs. Last Friday, Larry assembled chairs at a rate of 4 chairs per hour for part of the day and John assembled no chairs. If John and Larry assembled chairs for a total of 7 hours during these two days, how many chairs did John assemble last Thursday?
General
6 months ago
Please assist me with these math problems asap. Round answers to the nearest tenth
General
6 months ago
The parking lot at a store has a width of 20 yards 2 feet and a length of 30 yards ______________________________I II II I 20 yards 2 feetI II II lI II_____________________________I 30 yards
General
6 months ago
the function y= x/tanx is ( an even, an odd, neither an even or odd) function, the function y= secx/x is (an even, an odd, neither an even or odd) function? I have to select one of the answers in parentheses.
General
6 months ago
Suppose a random sample of 1,220 adults in a certain country were asked about their opinion regarding federal spending on public education. Respondents were asked whether federal spending on public education was (a) too low, (b) adequate, or (c) too high. Respondents were classified by income level. Choose the correct hypotheses to test whether there is an association between the response to the question and income level.A. Upper H 0H0:Among adults in the country, opinions about federal spending on education and income level are associated.Upper H Subscript aHa:Among adults in the country, opinions about federal spending on education and income level are independent.B. Upper H 0H0:There is no difference between the proportions of adults in the country who responded (a), (b) or (c) to the opinion question.Upper H Subscript aHa:There is a difference between the proportions of adults in the country who responded (a), (b) or (c) to the opinion question.C. Upper H 0H0:Among adults in the country, opinions about federal spending on education and income level are independent.Upper H Subscript aHa:Among adults in the country, opinions about federal spending on education and income level are associated.D. None of these
General
6 months ago
A recent poll asked people whether they supported passing a constitutional amendment to ban burning of the national flag using a 1 to 100 scale."1" means that they do not support passing the amendment at all and "100" means they support it completely. The sample was random (from the population of US adults) and included 986 people, 400 of whom were women, and 586 were men. The mean score for women was 80.6, while the mean score for men was 77.6. Is the difference in means test statistically significant at the 5% level? Assume the standard deviation for both men and women is 3.5.
General
6 months ago
A shopper purchased 8 t shirts and 5 pairs of pants for 220. The next day he purchased 5 t shirts and 1 pair of pants. How much does a t shirt and each pair of pants cost
General
6 months ago
9. A vendor is selling Coke and Sprite. He sold three times as many Cokes as Sprites. Ifhe sells 76 sodas in all, how many Cokes were sold? How many Sprites?
General
6 months ago
Length of the fence of a trapezium shaped field ABCD is 120meter.If BC=48m,CD=17m and AD=40m,find te area of this field.Sde AB is perpendicular to the parallel side AD and BC
General
6 months ago
suppose that during one period of extreme cold the average daily temp decreased 1 1/2 Fahrenheit each day how many days did it take for the temp to decrease by 9 degrees Fahrenheit for barrow Alaska
General
6 months ago
Choose the model that represents the function
General
6 months ago
A catalog company promises to deliver online orders within 3 days of the order being placed. Follow-up calls were made to randomly selected customers to see whether their orders arrived on time (within 3 days). A 95% confidence interval for percentage of on-time arrival is 88% +/- 6%. What does this mean? Are these conclusions correct? Explain. a) 95% of all random samples of customers will show that 88% of orders arrive on time. b) 95% of all random samples of customers will show that 82% to 94% of orders arrive on time. c) we are 95% sure that between 82% and 94% of the orders placed by the sampled customers arrived on time. d) on 95% of the days, between 82% and 94% of the orders will arrive on time.
General
6 months ago
The probability that a randomly selected teenager watched a rented video at least once during a week was 0.75. What is the probability that at least 5 teenagers in a group of 7 watched a rented movie at least once last week? (Round your answer to four decimal places.)P(X greaterthanorequalto 5) = __.
General
6 months ago
A student believes that no more than 20% (i.e., (less than or equal to) 20%) of the students who finish a statistics course get an A. A random sample of 100 students was taken. Twenty-four percent of the students in the sample received A's.a. State the null and alternative hypotheses.b. Using the critical value approach, test the hypotheses at the 1% level of significance.c. Using the p-value approach, test the hypotheses at the 1% level of significance.Below are the answers. I need help on how these are found with any and all proofs/formulas please!!a. H0: P (less than or equal to) 0.2Ha: P > 0.2b. Do not reject H0; test statistic Z = 1 < 2.33c. Do not reject H0; p-value = 0.1587 > 0.01
General
6 months ago
Eve collected 4 5/6 pounds of newspaper for the recycling drive. Jonah collected 9 1/3 times as much newspaper as Eve. How many pounds of newspaper did Jonah collect?Write your answer as a fraction or as a whole or mixed number.
General
6 months ago
Mrs Jenkins has 48 paint brushes and 60 tubes of paint he is going to put an equal number of paint brushes into each cup there will be no supplies leftover
General
6 months ago
5(x+4)+10-2x+3(2x+9)
General
6 months ago
NEED GEOMETRY HELP PLEASESee picture for question (need answer & explanation)
General
6 months ago
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