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An NHANES report gives data for 652 women aged 20 – 29 20–29 years. The BMI of these 652 652 women was ¯ x = 26.5 x¯= 26.5 . On the basis of this sample, we want to estimate the BMI μ μ in the population of all 20.6 20.6 million women in this age group. We treated these data as an SRS from a Normally distributed population with standard deviation σ = 7.2 σ=7.2 . Give three confidence intervals for the mean BMI μ in this population, using 90%, 95%, and 99% confidence. Enter the lower and upper bound for the 90% confidence interval.
General
2 months ago
The following observations were made on fracture toughness of a base plate of 18% nickel maraging steel (in ksi in. , given in increasing order)]: 65.1 71.9 72.7 73.1 73.4 73.5 75.5 75.7 75.8 76.1 76.2 76.2 77.0 77.9 78.3 79.6 79.7 79.9 80.1 82.2 83.6 93.8 Calculate a 99% CI for the standard deviation of the fracture toughness distribution. (Round your answers to one decimal place.) , ksi in Is this interval valid whatever the nature of the distribution? Explain. The interval is always valid. The distribution needs to be skewed to the right. The distribution needs to be approximately uniform. The distribution needs to be approximately normal.
General
2 months ago
If there are 5280 feet in a mile and 3600 seconds in an hour then a speed of 26 feet per second is closest to which of the following
General
2 months ago
an algebra teacher drove by a farmyard full of chickens and pigs.the teacher happened to notice that there were a totals of 100 heads and 270 legs. how many chickens were there? how many pigs were there ?
General
2 months ago
A triangle has side lengths measuring 20 cm, 5 cm, and n cm. Which describes the possible values of n?551515
General
2 months ago
Angelina has a collection of nickels and dimes worth $4.65. If she has 70 nickels and dimes, how many of each does she have?
General
2 months ago
Will, Sue and Micah went to dinner. Will paid 1/4 of the bill. Micah and Sue paid in the ratio of 1:3. If Sue paid $15 more than Will, how much did dinner cost in total?
General
2 months ago
A motorist made a 60-mile trip averaging 20 miles per hour.On the return trip,he averaged 30 miles per hour.What was the motorist's average speed for the entire trip?
General
2 months ago
If ABCD is a square and AB = 10, what is the measure of CE to the nearest hundredth?
General
2 months ago
Use the given information to find the p-value. Also, use a 0.05 significance level and state the conclusion about the null hypothesis (reject the null hypothesis or fail to reject the null hypothesis). With Upper H 1: pgreater than0.554, the test statistic is zequals1.34.
General
2 months ago
Find the missing measure for a right circular cone given the following information. Find r if T.A. = 12pi and L.A. = 8pi
General
2 months ago
Use the formula m = to calculate the slope of the line.The slope of the line is .
General
2 months ago
The number 'N' of cars produced at a certain factory in 1 day after 't' hours of operation is given by N(t)=100t-5t^2, 0< or equal t < or equal 10. If the cost 'C' (in dollars) of producing 'N' cars is C(N)=15,000+8000N, find the cost 'C' as a function of the time 't' of operation of the factory Then Interpret C(t) when t=5 hours as a new function.
General
2 months ago
99 POINTS POSSIBLE!!!! I have a lot of math problems.....Please show your work also:) I will give Brainiest too!1.Chase picked three buckets of blackberries that weigh: 2.79 pounds, 2.45 pounds, and 2.62 pounds. What is the average weight for the three buckets?2. Ashley is baking cookies for math class. The recipe calls for 4 4/5 cups of flour. Ashley has to make 1 1/3 times the recipe to feed the whole class. How much flour does Ashley need?3. Jordan finished her homework in 1 1/2 hours. It took Kasey 3/4 an hour longer than Jordan to finish her homework. How long did it take Kasey?4. 32.5 divided by -0.085. 4.3x= 81.7 (Decimal Equation)Thank you for helping me if you did!!!!!!!! I really appreciate it very much!!!!!!!
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2 months ago
g = 4ca - 3ba for a plzzzzz help me answer
General
2 months ago
Round to the nearest hundred thousand 89, 659
General
2 months ago
Lana earned $49on friday $42 on saturday,and $21 on sunday selling bracelets she sold each bracelet for the same amount what is the most she could have charged for eac bracelet?
General
2 months ago
Aliza needs to run at a rate faster than 8.8 feet per second in order to exceed her fastest time in a race. After running for 15 minutes, her coach determines that she is running at an average rate of 5.8 miles per hour. He converts the average rate to feet per second as shown below:He concludes that she is not running fast enough to exceed her fastest time.
General
2 months ago
The concession stand at a ballpark makes $0.43 profit from each hot dog sold. It also makes a profit of $0.65 from each pretzel sold and $1.31 from each drink sold. Which expression represents the total profit, in dollars, that the stand will make on a day when they sell h hot dogs, p pretzels, and d drinks?
General
2 months ago
one week, the music store sold 2 trumpets, 3 clarinets, and 5 violins for $1240. the next week, they sold 3 trumpets, 1 clarinet, and 4 violins for $1027. the following week, they sold 5 trumpets, 7 clarinets, and 2 violins for $2091. find the cost of a trumpet, a clarinet would, and a violin.
General
2 months ago
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