1/1 Practice 2 f 140 semiconductor chips is inspected by choosing a sample of 5 chips. Assume 10 of the chips do not conform to LusLumer requirements. (a) How many different samples are possible? (b) How many samples of five contain exactly one nonconforming chip? (c) How many samples of five contain at least one nonconforming chip?
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Q: QUESTION 2. A batch of 140 semiconductor chips is inspected by choosing a sample of 5 chips. Assume…
A: A batch contain 140 semiconductor chips is inspected by sample of 5 chips. i.e N=140 n=5
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- 15. The U.S. Energy Information Administration claimed that in 2017, U.S. residential customers used an average of 10,399 kilowatt hours (kWh) of electricity. A local power company believes that residents in their area use more electricity on average than EIA’s reported average. To test their claim, the company chooses a random sample of 100 of their customers and calculates that these customers used an average of 10,608 kWh of electricity in the prior year. Assuming that the population standard deviation is 1361 kWh, is there sufficient evidence to support the power company’s claim at the 0.05 level of significance? (a) Symbolically, state the null and alternative hypothesis and state which is the claim. (b) Calculate the standardized test statistic. You must show a filled out standardized test statistic formula. (c) Find either the critical values and identify the rejection regions or find the p-value. Also, decide whether to reject or fail to reject the null hypothesis and be sure…15. The dean of a university estimates that the mean number of classroom hours per week for full-time faculty is 10.0. As a member of the student council, you want to test this claim. A random sample of the number of classroom hours for eightfull-time faculty for one week is shown in the table below. At α=0.05, can you reject the dean's claim? Complete parts (a) through (d) below. Assume the population is normally distributed. 11.2 7.5 12.2 7.2 4.1 9.5 13.7 8.5 Question content area bottom Part 1 (a) Write the claim mathematically and identify H0 and Ha. Which of the following correctly states H0 and Ha? A. H0: μ>10.0 Ha: μ≤10.0 B. H0: μ≠10.0 Ha: μ=10.0 C. H0: μ<10.0 Ha: μ≥10.0 D. H0: μ≤10.0 Ha: μ>10.0 E. H0: μ≥10.0 Ha: μ<10.06
- 5-The number of contaminating particles on a silicon wafer prior to a certain rinsing process was determined for each wafer in a sample size 100, resulting in the following frequencies: Cumulative Frequency 1 TITI Cumulative Number of Particles Number of Particles Frequency 84 1 3 88 2 6 10 93 3 18 11 96 4 29 12 97 5 44 13 99 6 62 14 100 7 72 a) What proportion of the sampled wafers had (P2 8)? b) What proportion of the sampled wafers had between (5 < P < 10)?A state fisheries commission wants to estimate the number of bass caught in a given lake during a season in order to restock the lake with the appropriate number of young fish. The commission could get a fairly accurate assessment of the seasonal catch by extensive “netting sweeps" of the lake before and after a season, but this technique is much too expensive to be done routinely. Therefore, the commission samples a number of lakes and record the seasonal catch (thousands of bass per square mile of lake area) and size of lake (square miles). A simple linear regression was performed and the following R output obtained. Estimate Std. Error t value Pr(>|t|) (Intercept) 2.5463 0.4427 5.7513 0.0000 size 0.0667 0.3672 0.1818 0.8578 If a scatterplot showed a non-linear relationship between the response and explanatory variables, what should be done? O Nothing. Continue the analysis as is. Stop the analysis. Perform a natural log transformation on the response variable first. O Perform a…2.) The following are the weekly losses of worker-hours due to accidents in 10 industrial plants before and after a certain safety program was put into operation: 45 & 36 73 & 60 46 & 44 124 & 119 33 & 35 57 &51 83 & 77 34 & 29 26 & 24 17 & 11. Use 0.05 level of sig to test whether the safety program is effective.
- At ABC College it is estimated that at most 10% of the students use public transportation to the college. Does it seem to be a valid estimate if, in a random sample of 120 students, 25 students use public transportation. (Use α = .01)Use the data in the table below, which shows the employment status of individuals in a particular town by age group. Part-time Unemployed Age Full-time 0-17 25 187 252 18-25 391 200 199 26-34 434 66 22 35-49 562 192 149 50+ 461 170 237 If a person is randomly chosen from the town's population, what is the probability that the person is under 18 or employed part-time?A Geomatics exam taken by 12 students resulted in the following scores: 78, 65, 91, 86, 80, 89, 81, 77, 80, 94, 72, 79 Compute the z-score of the lowest test score (65). Note that this is a small sample (n<30), which needs to be considered in the computations. O 1.65 O-1.97 -2.05 2.05 1.97