7.4.9. Let A1,..., An be lid with where, where 0 > 0. (a) Find the mle 0 of 0. (b) Is a sufficient statistic for 0? Why?
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Q: None
A: see above
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- (a) Given that X ~ B(n, p) where n is a positive integer and 0 < p < 1. It is known that X has mean 12 and standard deviation 2. Find the values of n and p. (b) Given that Y ~ N(0,0²) where o is a positive real number such that P(|Y| < 1) = 0.3. Find the value of o, correct to three significant figures.The results section of an article reports the following “IQ scores of the sample differ from the population mean of 100, single sample t (19) = 2.80, p < .05, two tail”. Based on this result, how many people were included in the sample? Select one: 20 21 19 38Attached is my work so far. Can you tell me how to proceed from here? Thanks.
- The proportions of defective parts produced by two machines were compared, and the following data were collected. Determine a 90% confidence interval for p1 - p2. (Give your answers correct to three decimal places.) Machine 1: n = 152; number of defective parts = 17 Machine 2: n = 140; number of defective parts = 10 Lower Limit Upper Limitneedfully plz ans me9.3 Let Y₁, Y₂,..., Y, denote a random sample from the uniform distribution on the interval (0, 0+1). Let 0 =Y-; and O=Y). a Show that both ₁ and ₂ are unbiased estimators of 0. b Find the efficiency of 8₁ relative to ₂. n n+1
- Consider that μ1 and μ2 are the true mean stopping distances for motorcycles at 30 mph equipped with two different sets of tires. Tire set 1 is more expensive, so we only want to buy them if there is strong evidence that there is a mean stopping distance of at least 3 ft shorter at 30 mph. For Tire set 1, after nine tests, we get an x-bar1 of 110 ft and an s1 of 5 ft. For Tire set 2, after eight tests, we get an x-bar2 of 120 ft and an s2 of 6 ft. Assume that the distributions of stopping distances are roughly normal. (a) Find a point estimate of μ1 – μ2. Is the estimate biased or unbiased? (b) Find the estimated standard error the point estimate of μ1 – μ2? (c) Formulate and test the appropriate hypothesis at the α = 0.05 level.A company claims that the number of defective items manufactured during each run of making 100 of their products is independent of the number from other runs and that the proportion of defectives is not more than 3%. Assuming that the defective rate for each run is 3% Which of the following can be used to determine whether x = 8 is unusually a high number of defective items on the next run of 100 of their products?Q1. Does this statement accurately represent Type I error? Rejecting the Ho after a test statistic results in a p-value of .085 at α=0.05.A. YesB. NoC. None of the above
- 8.4.1B. In a 4-week study about the effectiveness of using magnetic insoles to treat plantar heel pain, 51 subjects wore magnetic insoles and 43 subjects wore nonmagnetic insoles. The results are shown at the right. At α=0.06, can you support the claim that there is a difference in the proportion of subjects who feel better between the two groups? Assume the random samples are independent. Complete parts (a) through (e). Do you Feel Better? A circle graph titled Magnetic Insoles is divided into two sectors with labels and approximate sizes as a percentage of a circle as follows: Yes, 15, 29.41 percent; No, 36, 70.59 percent. Magnetic Insoles Yes 15No 36 A circle graph titled Nonmagnetic Insoles is divided into two sectors with labels and approximate sizes as a percentage of a circle as follows: Yes, 21, 48.84 percent; No, 22, 51.16 percent. Nonmagnetic Insoles Yes 21No 22 (b) Find the critical value(s) and identify the rejection region(s). The…7.4.15-T Question Help v A humane society claims that less than 73% of households in a certain country own a pet. In a random sample of 600 households in that country, 420 say they own-a pet. At a = 0.10, is there enough evidence to support the society's claim? Complete parts (a) through (c) below. (a) Identify the claim and state Ho and H Identify the claim in this scenario. Select the correct choice below and fill in the answer box to complete your choice. (Type an integer or a decimal. Do not round.) O A. More than % of households in the country own a pet. O B. Less than % of households in the country own a pet. O C. The percentage households in the country that own a pet is not %. O D. % of households in the country own a pet. Click to select and enter your answer(s) and then click Check Answer. 4 parts remaining Clear All Check Answer 1:06 AM P Type here to search 2/21/2021 on fs 10 144 esc @ %23 %24 tbacksoace 3. 6. 7. 8. 9. W R Y tab H. K5. Y1, Y2,..., Yn are iid normal (u, o²) where o² unknown (п-1)52 Show that is a pivot quantity for estimation of o?
