Perform the 5 steps in hypothesis testing in each of the following situations. INITIUM TIMOR 1. In a plant nursery, the owner thinks that the lengths of seedlings in a box sprayed with a new kind of fertilizer has an average height of 26 cm after three days and a standard deviation of 10 cm. One researcher randomly selected 80 such seedlings and calculated the mean height to be 20 cm and the standard deviation was 10 cm. Will you conduct a one- tailed test or a two-tailed test? Proceed with the test using a = 0.05.

Q: A simple random sample of 34 men from a normally distributed population results in a standard…

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Q: Previously, an organization reported that teenagers spent 4.5 hours per week, on average, on the…

A: Introduction - z-score  z=x-μσwhere ,x=score σ=standard deviation μ=mean

Q: 1. A random sample of 64 university students wrote the LSAT (Law School Admission Test) in person…

A: Any assumption about the parameter or probability function is known as hypothesis testing. Given…

Q: State the null and alternative hypotheses. A chip manufacturer purchases silicon wafers (discs)…

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A: Given, x=745σ=300n=60α=1-0.99=0.01 i). The hypothesis to be tested is obtained as-…

Q: The records of a casualty insurance company show that, in the past, its clients have had a mean of…

A: Given Standard deviation=0.04

Q: a. Enter the null hypothesis for this test. Ho Select an answer ? b. Enter the alternative…

A: It is given that  Population mean, μ = 14.1 Sample mean, X̄ = 14.5 Sample standard deviation, s =…

Q: 3. The quality control manager at a light bulb factory needs to determine whether the average life…

A: Step 1:a.Assume that the population mean life of light bulb in the factory is µ.It is needed to test…

Q: The records of a casualty insurance company show that, in the past, its clients have had a mean of…

A: It is given that the population mean is μ=1.9. The population standard deviation is σ=0.05.

Q: A company that produces snack foods uses a machine to package 454 grams bags  of potato chips. A…

A:

Q: It is known that the scores on a standardized reading test are normally distributed with a mean of…

A: State the hypotheses.

Q: A farmer claims that the mean cotton yield per acre is less than or equal to 850 pounds. The farmer…

A: Hypotheses: Null hypothesis: µ ≥ 850. That is, the mean cotton yield per acre is not less than 850…

Q: a. Identify the null and alternative hypotheses. b. identify the test statistic c. identify the…

A: Systolic blood pressure levels above 120 mm Hg are considered to be high. For the 100 systolic blood…

Q: The average speed of a baseball line drive is 83 miles per hour. Josiah practiced a new technique to…

A: Given data is appropriate for testing of hypothesis to test z-test for single mean. Because it is a…

Q: Cans of Coke are filled by a machine to about 12 oz each. A randomly selected 36-pack of cans was…

A: Mean(x)=12.19 standard deviation(s)=0.13 sample size(n)=36 significance level(α)=0.01

Q: The average age of commercial jets in the U.S. is 15.6 years. An executive at a large airline…

A: Since you have posted question with multiple subparts,we will solve first three subparts for you.To…

Q: A manufacturer states that the average life of its television is 5 years. You were hired as a…

A: The hypothesized average life of television is 5 years (or 60 months). The sample size, i.e., the…

Q: An automotive engineer believes that her newly designed engine will be a great gas saver. A large…

A:

Q: According to the Annual survey of drugs expenditure in country X, the annual expenditure for…

A: (1) State the hypotheses. That is, there is no evidence that the population annual expenditure for…

Q: A researcher is conducting a study to determine the mean trough dosage of medication for a…

A: Given, Population standard deviation (σ) = 40 mg Margin of error (E) = 10 mg Confidence level = 95%

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A: The random variable age of pregnant women follows normal distribution. We have to test whether the…

Q: A century ago, the average height of adult women in the United States was 63 inches. Researchers…

A: Given ,population mean (μ)=63Sample size (n)=40Sample mean (X¯)=64.2Standard deviation (s)=2.9

Q: A researcher is interested in seeing if the average income of rural families is less than that of…

A: The descriptive statistics is given as follows Significance level = 0.01