the weight in pounds for a population of school aged children is normally distributed with a...
The weight (in pounds) for a population of school-aged children is normally distributed with a mean equal to 133 ± 21 pounds (μ ± σ). Suppose we select a sample of 100 children (n = 100) to test whether children in this population are gaining weight at a 0.05 level of significance. a. What are the null and alternative hypotheses? b. What is the critical value for this test? c. What is the mean of the sampling distribution? d. What...
The weight in pounds) for a population of school aged children is normally distributed with a mean equal to 126 ± 25 pounds sample of 100 children n 100) to test whether children in this population are gaining weight at a 0.05 level of significance o Suppose we select a E Part la) dard in the What are the null and atormative hypotheses? H, μ z 126 O He-126 H,RS126 lue esis cause HtJF 126 an Hi μ > 126...
The weight (in pounds) for a population of school-aged children is normally distributed with a mean equal to 138 ± 24 pounds (μ ± σ). Suppose we select a sample of 100 children (n = 100) to test whether children in this population are gaining weight at a 0.05 level of significance. Part (a) What are the null and alternative hypotheses? H0: μ = 138 H1: μ ≠ 138 H0: μ ≤ 138 H1: μ > 138 H0: μ ≤...
The weight (in pounds) for a population of school-aged children is normally distributed with a mean equal to 138 ± 16 pounds (μ ± σ). Suppose we select a sample of 100 children (n = 100) to test whether children in this population are gaining weight at a 0.05 level of significance. Part (a)What are the null and alternative hypotheses? H0: μ = 138 H1: μ ≠ 138H0: μ ≤ 138 H1: μ = 138 H0: μ = 138 H1: μ...
HW#9 - Chapter 18 (20pts for turned in on time) 2. (12pts)Body weight for students in NMSU is Normally distributed. In a report, it stated that the average weight for NMSU students is about 160 pounds. A researcher read the report, and he suspect that the average weight is below 160 pounds. To justify, he collected a SRS of 25 students from NMSU and the sample mean is 156.3 pounds, with a standard deviation of 12 pounds. (1) (6pts)Suppose you...
The weights of 9 year old male children are normally distributed population with a mean of 80 pounds and a standard deviation of 17 pounds. Determine the probability that a random sample of 26 such children has an average less than 72 pounds. Round to four decimal places. QUESTION 8 A Test has scores that are normally distributed with a mean of 71 and a standard deviation of 15. Determine the probability that a random sample of 26 test scores...
Using a random sample of 28 observations from a normally distributed population, Mike tested the null hypothesis of the population mean that Ho: p=30 against Hy: #30 at a significance level of 0.05 and rejected the null hypothesis. This means that: A. If the null hypothesis is really true, then the probability that Mike rejects it is 0.05. B. Mike needs a larger sample size. OC. If Mike uses another sample of 28 observations he will reject Ho again. OD....
The weight of a 5th grader is normally distributed with a mean of 82 pounds and a variance of 76 pounds^2. Let weight in pounds, be represented by random variable X. P(77<X< x2)=0.1070 Find x2.
The weight of a 5th grader is normally distributed with a mean of 83 pounds and a variance of 58 pounds^2. Let weight, in pounds, be represented by random variable X. P(77 < X < x2) = 0.1030. Find x2 (Round to four decimals at the end)
THE NORMAL DISTRIBUTION = BELL CURVE (GRAPH) the weights of a population of 12.000 two year old children are normally distribu u= 20 pounds and o =2 pounds. en are normally distributed with 2 -3 ----- --- 14 3 Z C is 2 22 24 (a) Indicate the correct weight for each z score in the graph above. . (b) What percent of the children weigh more than 22 pounds? (c) If one child is selected from this population, what...