Express the confidence interval 25.4%
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Express the confidence interval 25.4%<p<42.4%25.4%<p<42.4% in the form of ˆp±Ep^±E.
____% ±± _____%
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- botanist wants to see the effect of sound at 2 Hz frequency in a certain group of algae. From prior research was understood that (without sound stimuli the algae would be double in size every 24 hours on average: Around of experiment is conducted on n sample of algae and the average rate of growth is obtained to be X.3 times every 24 hours with standard deviation of X/10 where X is the last two digits of your student ID. (My student ID 04) a) In two sided hypothesis test, what is the appropriate Null and Alternative Hypothesis? b) In one sided hypothesis test, what is the appropriate Null and Alternative Hypothesis? c). If n=100, what is the appropriate conclusion that the botanist could take in two-sided test? d). If n=20, what is the appropriate conclusion that the botanist could take in two-sided test? e) If n=100, what is the appropriate conclusion that the botanist could take in one-sided test? f). if n=20, what is the appropriate conclusion that the botanist could take in…1-> % Consider a value to be significantly low if its z score less than or equal to -2 or consider a value to be significantly high if its z score is greater than or equal to 2 A data set lists weights (grams) of a type of coin. Those weights have a mean of 5 24139 g and a standard deviation of 0 06577 g identify the weights that are significa significantly high Com What weights are significantly low? Select the correct answer below and fit in the answer box(es) to complete your choice OA Weights that are between B. Weights that are less than Oc. weights that are greater than i and (Round to five decimal praces as needed Use ascending order) (Round to five decimal places as needed.) (Round to five decimal places as needed)Fawns between 1 and 5 months old have a body weight that is approximately normally distributed with mean ? = 28.4 kilograms and standard deviation ? = 4.1 kilograms. Let x be the weight of a fawn in kilograms. Convert the following x intervals to z intervals. (Round your answers to two decimal places.) x < 30z < ____ 19 < x___ < z 32 < x < 35____ < z < ____ Convert the following z intervals to x intervals. (Round your answers to one decimal place.) −2.17 < z___ < xz < 1.28x < ____ −1.99 < z < 1.44 ____< x < ____ If a fawn weighs 14 kilograms, would you say it is an unusually small animal? Explain using z values and the figure above. Yes. This weight is 3.51 standard deviations below the mean; 14 kg is an unusually low weight for a fawn. Yes. This weight is 1.76 standard deviations below the mean; 14 kg is an unusually low weight for a fawn. No. This weight is 3.51 standard deviations below the mean; 14 kg is a normal weight…
- Express the confidence interval 31.7%<p<44.9%31.7%<p<44.9% in the form of ˆp±Ep^±E.______% ±±_________ %Fawns between 1 and 5 months old have a body weight that is approximately normally distributed with mean ? = 28.4 kilograms and standard deviation ? = 4.1 kilograms. Let x be the weight of a fawn in kilograms. Convert the following z intervals to x intervals. (Round your answers to one decimal place.) (a) −2.17 < z___ < x(b) z < 1.28x < ___(c) −1.99 < z < 1.44___ < x < ___Experience of Taxi Drivers A taxi company claims that its drivers have an average of at least 12.4 years’ experience. In a study of 15 taxi drivers, the average experience was 11.2 years. The standard deviation was 2. At alpha = 0.10, is the number of years’ experience of the taxi drivers really less than the taxi company claimed? Please show how to solve using the formulas, thanks!
- A random sample of 90 eighth grade students' scores on a national mathematics assessment test has a mean score of 288. This test result prompts a state school administrator to declare that the mean score for the state's eighth graders on this exam is more than 280. Assume that the population standard deviation is 36. At α = 0.08, is there enough evidence to support the administrator's claim? Complete parts (a) through (e). (a) Write the claim mathematically and identify Ho and H₂. Choose the correct answer below. A. Ho: μ = 280 (claim) Ha:μ>280 Ho:μ≤280 Ha: μ> 280 (claim) B. Ho: μ = 280 P-value = (b) Find the standardized test statistic z. z = 2.11 (Round to two decimal places as needed.) (c) Find the P-value. E. Ho: μ≤280 (claim) Ha:μ>280 Ha: μ> 280 (claim) (Round to three decimal places as needed.) C. Ho: μ ≥280 (claim) Ha:μ< 280 F. Ho: μ< 280 H₂:μ ≥280 (claim)A random sample of 82 eighth grade students' scores on a national mathematics assessment test has a mean score of 286. This test result prompts a state school administrator to declare that the mean score for the state's eighth graders on this exam is more than 280. Assume that the population standard deviation is 38. At α = 0.05, is there enough evidence to support the administrator's claim? Complete parts (a) through (e). (a) Write the claim mathematically and identify Ho and H₂. Choose the correct answer below. O A. Ho: ≤280 (claim) H₂:μ>280 O D. Ho: μ≤280 Ha: μ> 280 (claim) B. Ho: μ280 OF. Ho: μ = 280 H₂: µ>280 (claim)A jar contains 3 nickels and 2 dimes. You reach in and randomly select 2 coins. Let Xrepresent the value of the two coins in cents. Find [a] theexpected value of Xand [b] the standard deviation of X.Round answers to 2 decimals. [a] Expected Value: __________ [b] Standard Deviation: __________