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A programmer claims that the average amount of time needed to create a simple website is...
Instructor-created question Question Help The local veterinarian claims pugs weigh about 20 lbs on average. You...
Instructor-created question Question Help The local veterinarian claims pugs weigh about 20 lbs on average. You think it may be less To test your hypothesis, you develop hypotheses, Hop=20 versus Hy <20, and record the weights of a simple random sample of 17 pugs. Assume the population of pug weights is known to be normally distributed Answer parts (a)(c) Click here to view the 1-Distribution Area in Right Tail. (a) If your mean sample weight is 18.4 pounds with a...
5. Suppose a recent report claims that the average cost of a new car is $34,000....
5. Suppose a recent report claims that the average cost of a new car is $34,000. We collect a random sample of new car prices from kellybluebook.com in order to determine whether the actual average cost is less than that. We find the average cost of the cars in our sample is $27,375 The graph below shows 1000 simulated samples from the null distribution when testing whether the average cost is less than $34,000. Shade in the part of the...
A manufacturer of power tools claims that the average amount of time required to assemble their...
A manufacturer of power tools claims that the average amount of time required to assemble their top-of-the-line table saw is 80 minutes with a standard deviation of 40 minutes. Suppose a random sample of 64 purchasers of this table saw is taken. The probability that the sample mean will be greater than 88 minutes is __________. You should use the finite population correction factor for this problem. True False
Garrison Keller claims the children of Lake Wobegon are above average. You take a simple random...
Garrison Keller claims the children of Lake Wobegon are above average. You take a simple random sample of 9 children from Lake Wobegon and measure their intelligence with a Wechsler test and find the following scores: {116, 128, 125, 119, 89, 99, 105, 116, and 118}. The mean of this sample (? ̅) is 112.8. We know Wechsler scores are scaled to be normally distributed with a mean of 100 and standard deviation of 15. Is this sample mean sufficiently...
Home Towne Realty claims the average price of a house in the outskirts of Asheville, NC...
Home Towne Realty claims the average price of a house in the outskirts of Asheville, NC is $100,000. A random sample of 50 houses in the outskirts resulted in a mean price of $120,000. The standard deviation was $47,000. We want to determine if the Home Towne Realty claims are true. If the test statistic is t = 3.009, and we reject H0 if either t < -2.01 or z > 2.01, which statement correctly interprets the decisions. Group of...
5. The reported average cost per workbook at a large college is $27.50. A professor claims that the actual...
5. The reported average cost per workbook at a large college is $27.50. A professor claims that the actual average cost per workbook is higher than $27.50. A sample of 40 different workbooks has an average cost of $29.95. The population standard deviation is known to be $5.50. Can the null hypothesis be rejected at alpha = 0.05? For question #5 (multiple choice), tell whether this a right, left, or two- tailed test. For question #6, identify the null hypothesis from choices given....
A college claims that students in its football program boast an average GPA of 3.0. A...
A college claims that students in its football program boast an average GPA of 3.0. A sample one year of 110 players reveals an average GPA of 2.86 with a standard deviation of 0.52. We want to test this claim, but are only concerned with whether the true GPA of football players is less than 3.0 (if it’s higher, that’s a good thing). (a) What are the null and alternative hypotheses? (b) Calculate the t-value to test the college’s claim....
Section 1: Writing hypotheses 1. North River Health Clinic claims that the average waiting time f...
please answer this question
subject about Business Statistics. THANKS..
Section 1: Writing hypotheses 1. North River Health Clinic claims that the average waiting time for a patient is 20 minutes. A random sample of 6 patients showed a mean wait time of 23.2 minutes. At the.05 level of significance, does the sample show that the mean wait time is different from 20 minutes? State the null and alternate hypotheses. 2. North River Health Clinic claims that the average waiting time...
A study found that subjects slept on average 20 minutes less on nights of the full moon than othe...
please show work
A study found that subjects slept on average 20 minutes less on nights of the full moon than otherwise. Other researchers disagree and are interested in testing whether the mean difference in sleep is less than 20 minutes. A random sample of 100 subjects showed that they slept, on average, 10 minutes less on nights of the full moon than otherwise. Assume the population standard deviation is 15 minutes. Use a 0.01 significance level. 2. Underline the...
A. A supermarket claims that the average wait time at the checkout counter is less than...
A. A supermarket claims that the average wait time at the checkout counter is less than 9 minutes. We can assume that the population is Normally distributed. Consider H0: mu >= 9 H1: mu < 9 A random sample of 50 customers yielded an average wait time of 8.2 minutes and a standard deviation of 2.5 minutes. What is the value of the test statistic (tstat or t-sub-xbar)? (Provide two decimal places)____________ B. Let Z be a standard Normal random...
Instructor-created question Question Help The local veterinarian claims pugs weigh about 20 lbs on average. You think it may be less To test your hypothesis, you develop hypotheses, Hop=20 versus Hy <20, and record the weights of a simple random sample of 17 pugs. Assume the population of pug weights is known to be normally distributed Answer parts (a)(c) Click here to view the 1-Distribution Area in Right Tail. (a) If your mean sample weight is 18.4 pounds with a...
5. Suppose a recent report claims that the average cost of a new car is $34,000. We collect a random sample of new car prices from kellybluebook.com in order to determine whether the actual average cost is less than that. We find the average cost of the cars in our sample is $27,375 The graph below shows 1000 simulated samples from the null distribution when testing whether the average cost is less than $34,000. Shade in the part of the...
please answer this question
subject about Business Statistics. THANKS..
Section 1: Writing hypotheses 1. North River Health Clinic claims that the average waiting time for a patient is 20 minutes. A random sample of 6 patients showed a mean wait time of 23.2 minutes. At the.05 level of significance, does the sample show that the mean wait time is different from 20 minutes? State the null and alternate hypotheses. 2. North River Health Clinic claims that the average waiting time...
please show work
A study found that subjects slept on average 20 minutes less on nights of the full moon than otherwise. Other researchers disagree and are interested in testing whether the mean difference in sleep is less than 20 minutes. A random sample of 100 subjects showed that they slept, on average, 10 minutes less on nights of the full moon than otherwise. Assume the population standard deviation is 15 minutes. Use a 0.01 significance level. 2. Underline the...
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