Using The Chi-Square Distribution Table, =σ2225, =α0.10, =n30, and a two-tailed test, find the following: State the hypotheses. H0: H1:
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Using The Chi-Square Distribution Table, =σ2225, =α0.10, =n30, and a two-tailed test, find the following:
State the hypotheses.
H0:
H1:
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- Use the technology or a normal table to find each of the following. Include an appropriately labled sketch a. find the probability that the z-score is 2.03 or less? b. find the probability that the z-score is -1.75 or more? c. find the probability that the z-score will be between -1.25 and 1.40Assume that hybridization experiments are conducted with peas having the property that for offspring, there is a 0.75 probability that a pea has green pods. Assume that the offspring peas are randomly selected in groups of 40. Complete parts(a) through (c) below. a. Find the mean and the standard deviation for the numbers of peas with green pods in the groups of 40. The value of the mean is μ= peas. The value of the standard deviation is σ= peas. (Round to one decimal place as needed.) b. Use the range rule of thumb to find the values separating results that are significantly low or significantly high. Values of peas or fewer are significantly low. Values ofpeas or greater are significantly high. c. Is a result of 3 peas with green pods a result that is significantly low? Why or why not? The result is not is significantly low, because 3 peas with green pods is less than equal to greater than nothing peas.Assume that, for a given test, the population mean is µ=50 and the population standard deviation is σ=10. What is the probability that your sample mean will be 54 or higher, if you have a randomly drawn sample size of n=4?
- What is the probability that a randomly selected z-value will be greater than 2.23?If P(A) = 0.52, P(B) = 0.45 and P(A u B) = 0.76, then P(B | A) = (Enter a number between 0 and 1, using two decimal points)Is the difference between the mean annual salaries of registered nurses in State A and State B equal to $9,000? To decide, you select a random sample of registered nurses from each state. The results of each survey are shown. Assume the population standard deviations are σ1=$8373 and σ2=$7636. At α=0.01, what can you conclude? Registered Nurses in State A Registered Nurses in State B x1 = 75,853 n1 = 25 x2 = 70,853 n2 = 20
- A standardized math test of fifth grade students produces a mean ?μ = 100 with a ?σ = 18. A sample of n = 36 students participated in "boost" training for their math skills. The sample M = 104 with S = 24. Did this "boost" training significantly improve students' math performance? Use ?α = .01.65 homeless people in San Jose were asked their age. The sample mean age was 33.2 years. Let x be a random variable representing ages of homeless people in San Jose. Assume that x has a normal distribution and o = 7.3 years. Do the data indicate that the mean age of the population of homeless people in San Jose is less than 35 years old? Use a = 0.05. Identify the following in your answer. 1. Identify the null hypothesis Ho and alternate hypotheses H, for the problem. 2. Identify the sample statistic, test statistic, p-value and calculator key used: Sample Statistic (sample mean) (Stated in problem) = Test Statistic (z) (Round to two decimal places) %3D P-value: (Round to four decimal places) = Calculator key used: 3. Identify the significance level and determine if you reject or fail to reject the null hypothesis. significance level = Do you reject or fail to reject Ho ? 4. State your conclusion. Upload your answer. Remember you can only upload one document. Upload Choose a FileAssume that hybridization experiments are conducted with peas having the property that for offspring, there is a 0.75probability that a pea has green pods. Assume that the offspring peas are randomly selected in groups of 36. Complete parts (a) through (c) below. a. Find the mean and the standard deviation for the numbers of peas with green pods in the groups of 36. The value of the mean is μ= peas.
- The average dues paid by students at state universities across the country were $2236 per student last year. The average for a random sample of 500 students this year is $2350. Given the following hypotheses, Ho: 4 = 2236 (The average fees are the same as last year.) Ha: M + 2236 (The average fees are not the same as last year.) compute the p-value for the sample result. Assume the population standard deviation is $724. If the significance level is 5%, can the null hypothesis be rejected?Is the difference between the mean annual salaries of registered nurses in State A and State B equal to $11,000? To decide, you select a random sample of registered nurses from each state. The results of each survey are shown. Assume the population standard deviations are σ1=$8350 and σ2=$7624. At α=0.01, what can you conclude? Registered Nurses in State A Registered Nurses in State B x1 = 75,876 n1 = 30 x2 = 70,876 n2 = 25Find the p-value for the hypothesis test. A random sample of size 54 is taken. The sample has a mean of 375 and a standard deviation of 83. H0: µ = 400 Ha: µ< 400 The p-value for the hypothesis test is . rounded to 4 decimal places