1. It is claimed that the average weight of a bag of biscuits is 250 grams with a standard deviation of 20.5 grams. Would you agree to this claim if a random sample of 50 bags of biscuits showed an average weight of 240 grams, using a 0.05 level of significance? A ran
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Q: The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 259.1…
A: Given : Mean , u = 259.1 standard deviation, σ = 67.9
Q: The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 263.9…
A: a) The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the…
Q: The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 263.1…
A: μ = 263.1σ = 66.9Normal distributionempirical rule:68-95-99.7% data fall withikn1σ-2σ-3σ of μ…
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Q: The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 245.4…
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Q: A survey found that women's heights are normally distributed with mean 62.8 in. and standard…
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Q: The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 260.2…
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Q: A survey found that women's heights are normally distributed with mean 62.8 in. and standard…
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A: Givenwomen's heights are normally distributed withMean(μ)=62.7standard deviation(σ)=2.6Men's heights…
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- A nutritionist claims that children 13 to 15 years old are consuming less than the recommended iron intake of 20.5 mg. To test the nutritionist's claim of iron deficiency, a random sample of children 13 to 15 years old will be obtained. Assume that the data for iron intake follows the normal distribution with a standard deviation of 4.75 mg. Find the size of the sample that you should take if you want to estimate the true mean iron intake to within 1 mg with 99% confidence. 62 149 O 150 O 61Determine whether the event described are independent or dependent. Then find the probability of the event Randomly drawing and immediately eating three red M&Ms in a row from a bag that contains 10 red M&Ms out of 30 M&Ms totalThe blood platelet counts of a group of women have a bell-shaped distribution with a mean of 245.6 and a standard deviation of 64.4. (All units are 1000 cells/uL.) Using the empirical rule, find each approximate percentage below. a. What is the approximate percentage of women with platelet counts within 3 standard deviations of the mean, or between 52.4 and 438.8? b. What is the approximate percentage of women with platelet counts between 181.2 and 310.0? a. Approximately % of women in this group have platelet counts within 3 standard deviations of the mean, or between 52.4 and 438.8. (Type an integer or a decimal. Do not round.) b. Approximately % of women in this group have platelet counts between 181.2 and 310.0. (Type an integer or a decimal. Do not round.)
- A survey found that women's heights are normally distributed with mean 62.3 in. and standard deviation 2.6 in. The survey also found that men's heights are normally distributed with mean 68.7 in. and standard deviation 3.4 in. Most of the live characters employed at an amusement park have height requirements of a minimum of 57 in. and a maximum of 64 in. Complete parts (a) and (b) below. a. Find the percentage of men meeting the height requirement. What does the result suggest about the genders of the people who are employed as characters at the amusement park? %. The percentage of men who meet the height requirement is (Round to two decimal places as needed.)a. What is the approximate percentage of women with platelet counts within 1 standard deviationof the mean, or between196.2 and 326.8? b. What is the approximate percentage of women with platelet counts between 130.9and 392.1?A metropolitan transportation authority has set a bus mechanical reliability goal of 3,900 bus miles. Bus mechanical reliability is measured specifically as the number of bus miles between mechanical road calls. Suppose a sample of 100 buses resulted in a sample mean of 3,925 bus miles and a sample standard deviation of 225 bus miles. Complete parts (a) and (b) below. a. Is there evidence that the population mean bus miles is more than 3,900 bus miles? (Use a 0.05 level of significance.) Identify the critical value(s). Determine the test statistic. State the conclusion. Determine the p-value and interpret its meaning
- The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 254.4 and a standard deviation of 60.2. (All units are 1000 cells/uL.) Using the empirical rule, find each approximate percentage below. a. What is the approximate percentage of women with platelet counts within 1 standard deviation of the mean, or between 194.2 and 314.6? b. What is the approximate percentage of women with platelet counts between 73.8 and 435.0? a. Approximately 68 % of women in this group have platelet counts within 1 standard deviation of the mean, or between 194.2 and 314.6. (Type an integer or a decimal. Do not round.) b. Approximately % of women in this group have platelet counts between 73.8 and 435.0. (Type an integer or a decimal. Do not round.)10) A county is considering raising the speed limit on a road because they claim that the mean speed of vehicles is greater than 40 mi/hr. A random sample of 15 vehicles has a mean speed of 43 mil/hr and a standard deviation of 4.4 mi/hr. Assume that speeds follow a normal distribution. What statistical test should be used to test the claim? (pick one of the options) 1. t-test 2. 2.73 3. 15 4. 10.9 5. 14 6. z-test 7. 2.52 8. 2.64 Calculate the value of standardized test statistic. (pick one of the options) 1. t-test 2. 2.73 3. 15 4. 10.9 5. 14 6. z-test 7. 2.52 8. 2.64 What is the degree of the freedom for the distribution of the test statistics. (pick one of the options) 1. t-test 2. 2.73 3. 15 4. 10.9 5. 14 6. z-test 7. 2.52 8. 2.64A survey found that women's heights are normally distributed with mean 63.9 in. and standard deviation 3.5 in. The survey also found that men's heights are normally distributed with mean 69.2 in. and standard deviation 3.7 in. Most of the live characters employed at an amusement park have height requirements of a minimum of 55 in. and a maximum of 63 in. Complete parts (a) and (b) below. a. Find the percentage of men meeting the height requirement. What does the result suggest about the genders of the people who are employed as characters at the amusement park? The percentage of men who meet the height requirement is % (Round to two decimal places as needed.)
- The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 260.4 and a standard deviation of 60.2. (All units are 1000 cells/uL.) Using the empirical rule, find each approximate percentage below. a. What is the approximate percentage of women with platelet counts within 3 standard deviations of the mean, or between 79.8 and 441.0? b. What is the approximate percentage of women with platelet counts between 140.0 and 380.8? ..I. a. Approximately % of women in this group have platelet counts within 3 standard deviations of the mean, or between 79.8 and 441.0. (Type an integer or a decimal. Do not round.)The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 255.1 and a standard deviation of 62.2. (All units are 1000 cells/uL.) Using the empirical rule, find each approximate percentage below. a. What is the approximate percentage of women with platelet counts within 3 standard deviations of the mean, or between 68.5 and 441.7? b. What is the approximate percentage of women with platelet counts between 192.9 and 317.3? a. Approximately % of women in this group have platelet counts within 3 standard deviations of the mean, or between 68.5 and 441.7. (Type an integer or a decimal. Do not round.)Systolic blood pressure levels above 120 mm Hg are considered to be high. For the 100 systolic blood pressure levels listed in the accompanying data set, the mean is 128.86000 mm Hg and the standard deviation is 15.28254 mm Hg. Assume that a simple random sample has been selected. Use a 0.01 significance level to test the claim that the sample is from a population with a mean greater than 120 mm Hg.LOADING... Click the icon to view the data set of systolic blood pressure levels. the attachement is listed below. and the systolic blood pressure data is listed below Body and exam measurements are from 100 subjects. SYSTOLIC is systolic blood pressure (mm…
