lable data, indicate the lower and upper 80% CI for the ratio between the 2 1 Trt A 1.75 16 a. 0.5377 [0²A/0²B] 4.4566 Trt B 0.94 41 b. 1.0088 [0²A/0²B] 3.0949 c. 0.8748 [0²A/0²B] 5.3952
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- A snack food manufacturer estimates that the variance of the number of grams of carbohydrates in servings of its tortilla chips is 1.25. A dietician is asked to test this claim and finds that a random sample of 22 servings has a variance of 1.35. At ⍶ = 0.05 is there enough evidence to reject the manufacturer’s claim?The table to the right shows the cost per ounce (in dollars) for a random sample of toothpastes exhibiting very good stain removal, good stain removal, and fair stain removal. At alpha equals0.01 , can you conclude that the mean costs per ounce are different? Perform a one-way ANOVA test by completing parts a through d. Assume that each sample is drawn from a normal population, that the samples are independent of each other, and that the populations have the same variances. Very good stain removal Good stain removal Fair stain removal 0.35 0.42 0.44 0.51 2.74 1.28 0.64 0.46 0.34 1.62 0.33 nothing 0.47 0.75 nothing 0.36 1.32 nothing (a) Identify the claim and state Upper H 0 and Upper H Subscript a . Choose the correct answer below. A. Upper H 0 : At least one mean is different from the others. (claim) Upper H Subscript a : mu 1 equals mu 2 equals…The table to the right shows the cost per ounce (in dollars) for a random sample of toothpastes exhibiting very good stain removal, good stain removal, and fair stain removal. At alpha equals0.05 , can you conclude that the mean costs per ounce are different? Perform a one-way ANOVA test by completing parts a through d. Assume that each sample is drawn from a normal population, that the samples are independent of each other, and that the populations have the same variances. Very good stain removal Good stain removal Fair stain removal 0.64 0.33 0.44 0.35 2.73 1.33 0.51 0.42 0.34 1.53 0.75 nothing 0.48 0.58 nothing 0.47 1.38 nothing (a) Identify the claim and state Upper H 0 and Upper H Subscript a . Choose the correct answer below. A. Upper H 0 : mu 1 equals mu 2 equals mu 3 (claim) Upper H Subscript a : At least one mean is different from…
- An auto manufacturer claims that the variance of the gas mileage in a model of a hybrid vehicle is 0.16. A random sample of 30 vehicles has a variance of 0.26. At alpha = 0.05, is there enough evidence to reject the claim? Assume the population is normally distributed.Two samples of sizes 25 and 20 are independently drawn from two normal populations, where the unknown population variances are assumed to be equal. The number of degrees of freedom of the equal-variances t-test statistic is ?A snack food manufacturer estimates that the variance of the number of grams of carbohydrates in servings of its tortilla chips is 1.141.14. A dietician is asked to test this claim and finds that a random sample of 2424 servings has a variance of 0.950.95. At alpha equals 0.10α=0.10, is there enough evidence to reject the manufacturer's claim? Assume the population is normally distributed.
- The standard z-value of an arbitrary 16-unit sample from the normal-class population with a mean of 60 and a variance of 100 is 2.0.Given that age of ECU students is normally distributed. A random sample of 16 students had an average age of 25 years and a variance of 4 square years. The 98% CI for the true average age of all ECU students is?The mean ±1 sd of ln [calcium intake (mg)] among 25 females, 12 to 14 years of age, below the poverty level is 6.56 ± 0.64. Similarly, the mean ± 1 sd of ln [calcium intake (mg)] among 40 females, 12 to 14 years of age, above the poverty level is 6.80 ± 0.76. Now, please answer all the parts 1 and 2 : 1. Test for a signifcant difference between the variances of the two groups. 2. Compute a 95% CI for the difference in means between the two groups.
- The average expenditure per student (based on average daily attendance) for a certain school year was $10,337 with a population standard deviation of $1560. A survey for the next school year of 150 randomly selected students resulted in a sample mean of $10, 798. Find the Z statistics? Should the null hypothesis be rejected at alpha = .05 level of significance?An auto manufacture claims that the variance of the gas mileages in a model of hybrid vehicle is 0.16. A random sample of 30 vehicles has a varience of 0.26. At a=0.05 is there enough evidence to reject the claim??in a recent year , the mean number of strokes per hole for a famous golfer was approximalety 3.6 A.) find the variance and standard deviation using the fact that the variance of a possion distribution is o^2=u b) how likely is this golfer to play an 18-hole round and have more than 72 strokes?