4.60Although bats are not known for their eyesight,they are able to locate prey (mainly insects) byemitting high-pitched sounds and listening forechoes. A paper appearing in Animal Behaviour ("TheEcholocation of Flying Insects by Bats" [1960]: 141–154)gave the following distances (in centimeters) at whicha bat first detected a nearby insect:62 23 27 56 52 344240 68 45 83a. Compute the sample mean distance at which thebat first detects an insect.b. Compute the sample variance and standard devia-tion for this data set. Interpret these values.

We have given that, The data set are : X:- 62, 23, 27, 56, 52, 34, 42, 40, 68, 45, 83 Then, We…

Answered: 4.60 • Although bats are not known for…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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The following measurements were taken on a sample n= 12 Sprucę trees selected at random from å stand. (X= diameter(cm) (at breasť height) and'Y = height (m)). The data are tabulated below: 6 7 8 9 10 | 11 | 12 tree 1 2 3 | 4 | 5_ X (diam) 22.0 16.6 19.4 19.8 18.9 14.1 20.3 5.8 20.0 10.1 15.5 22.9 Y (height) 22.3 | 18.8 20.2 18.0 20.0 18.5 17.8 8.0 19.2 12.1 16.8 19.8 Σx-205.4, Σy- 211.5, Σ3796.38 , Σν-3895.19, Σsy - 3817.58 1. The value of Sx is: 2. The value of Syy is: 3. The value of Sxy is: oices for 1. to 3. b) 164.7 g) 241.6 c) 167.5 h) 280.6 122.0 d) 177.7 i) 381.4 e) 197.4 205.1 j) 398.1
Please answer part c of the question in the image uploaded
1.3.2 Consider the output given below that was obtained using the One Proportion applet. Use information from the output to find the standardized statistic for a sample propor- tion value of 0.45. Probability of success (n): 0.30 Sample size (n): 25 Number of samples: 1000 O Animate Draw Samples Total = 1000 180 Mean = 0.301 SD = 0.091 120 60 0.08 0.16 0.24 0.32 0.40 0.48 0.56 0.64 Proportion of success
4. Bags of a certain brand of tortilla chips claim to have a net weight of 14 ounces. Net weights actually vary slightly from bag to bag and are Normally distributed with mean μ. A representative of a consumer advocate group wishes to see if there is any evidence that the mean net weight is less than advertised and so intends to test the hypotheses Ho: = 14, Ha: < 14. To do this, he selects 16 bags of this brand at random and determines the net weight of each. A Type I error in this setting would mean (a) concluding that the bags are being underfilled when they actually aren't. (b) concluding that the bags are being underfilled when they actually are. concluding that the bags are not being underfilled when they actually are. (d) concluding that the bags are not being underfilled when they actually aren't. (e) none of these
Imagine we're conducting a single sample t-test. We're testing one-tailed at an alpha level of 0.05 and find a cut-off value of 1.833. What is the used sample size? A) 12 B) 10 C) 9 D) 11
8.2 Use technology to find the P-value for the hypothesis test described below. The claim is that for a smartphone carrier's data speeds at airports, the mean is μ=17.00 Mbps. The sample size is n=21 and the test statistic is t=−1.798
In a 4-week study about the effectiveness of using magnetic insoles to treat plantar heel pain, 51 subjects wore magnetic insoles and 47 subjects wore nonmagnetic insoles. The results are shown at the right. At α=0.06, can you support the claim that there is a difference in the proportion of subjects who feel better between the twogroups? Assume the random samples are independent. Complete parts (a) through (e).
10.35 The dispersion, or variance, of haul times on a construction project is of great importance to the project supervisor, because highly variable haul times cause problems in scheduling jobs. The supervisor of the truck crews states that the range of haul times should not exceed 40 minutes (The range is the difference between the longest and shortest times.) Assuming these haul times to be approximately normally distributed, the project supervisor takes the statement on the range to mean that the stan- dard deviation (o should be approximately 10 minutes. Fifteen haul times are actually measured and show a mean of 142 minutes and a standard deviation of 12 minutes. Can the claim of (o = 10 be refuted at the 5% sig- nificance level?
A poll classified respondents by gender and political party, as shown in the table. A researcher wonders if gender and party affiliation are not independent. (Assume a significance level of α = 0.05) Complete parts a) through e) below. d) Find the P-value for this test. Calculate the chi-square statistic. x² = 2.339 (Round to three decimal places as needed.) Find the P-value for the test. Choose the correct answer below. 0.0823 0.3104 0.003 DRIO 40 40 25 Male Female 49 35 18 e) State an appropriate conclusion. Choose the correct answer below. O A. Fail to reject the null hypothesis. There is sufficient evidence to support the claim. B. Reject the null hypothesis. There is not sufficient evidence to support the claim. C. Reject the null hypothesis. There is sufficient evidence to support the claim. O D. Fail to reject the null hypothesis. There is not sufficient evidence to support the claim.

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